bluuebunny/crossref_metadata_2025 huggingface dataset:
Mechanisms of femtosecond laser ablation of monolayer hBN and its application to nanopatterning
Authors: Ahmad Sabeeh Irfan , Dave Arpit , Sarpong Emmanuel , Yao Hsin-Yu , Solomon Joel M. , Jiang Jing-Kai , Luo Chih-Wei , Chang Wen-Hao , Her Tsing-Hua
Published: September 2024

We observe a reduced ablation threshold of monolayer hBN in comparison to bulk materials with similar bandgap energy. The ablation mechanism is established to be intrinsic and impressive nanopatterning resolution is demonstrated.
Femtosecond Laser Damage Comparison between Silica/Hafnia Nanolaminates vs. Mixed Material Coatings for High Power Laser Optics
Authors: DeAngelis Emma , Noor Mohamed Yaseen , Weiss Maxwell , Menoni Carmen , Chowdhury Enam
Published: September 2024

Two layer anti-reflection coatings (Air/SiO2/HfSiO/substrate. vs Air/SiO2/Hf-SiO2 nanolaminates/substrate) were tested with p-polarized 77 fs 1030 nm laser pulses. Damage threshold fluence of the sample with nanolaminate was ~ 2/3 of the damage fluence of the mixed layer sample.
Ultrawide Field-of-View, Large Depth-of-Field Imaging Using Metalenses
Authors: Martin-Monier Louis , Li Zhaoyi , Gu Tian , Hu Juejun
Published: September 2024

Herein, we present a bi-layer metasurface with a 172° field-of-view, a depth-of-field extending from 1 mm to 300 mm, a resolution down to 50 lp/mm, and thicknesses down to 0.2 mm.
Photo-Thermal Plasmonic Sensors for Technology-Independent Control and Stabilization of PICs
Authors: di Tria A. , Martinez A. , Bongiorno S. , Grimaldi V. , Kohli M. , Chatzitheocharis D. , Koch U. , Leuthold J. , Sharma D. , Bouhelier A. , Melloni A. , Morichetti F. , Zanetto F. , Ferrari G. , Sampietro M.
Published: September 2024

This paper presents photo-thermal plasmonic sensors enabling closed-loop stabilization of photonic integrated circuits. Micrometric dimensions and simple fabrication make them suitable for any technological platform, providing sensitivity and control to technologies not featuring active optoelectronics.
1D Line-scan Metalens Integrated with MEMS Actuator for Depth Sensing Applications
Authors: Fu Yuan Hsing , Carminati Roberto , Wang Huanhuan , Lim Leh Woon , Choi Narak , Lai Keng Heng , Goh Charmaine Shuyan , Tsang Yat Fung , Singh Navab , Zhang Qingxin
Published: September 2024

A 1D line-scan metalens integrated MEMS actuator with a field-of-view 80° × 60° has been demonstrated as proof-of-concept. This metalens integrated MEMS actuator shows promise as a compact optical module for depth sensing applications.
Subwavelength Grating Cascaded Microring Resonator Biochemical Sensors with Record-High Sensitivity
Authors: Cheng Weiqing , Sun Xiao , Ye Shengwei , Yuan Bocheng , Marsh John H. , Hou Lianping
Published: September 2024

A compact SOI-based subwavelength grating cascaded microring resonator is demonstrated with a record-high sensitivity of 810 nm/RIU and a limit of detection of 2.04×10-5 RIU. The measured concentration sensitivity is 1430 pm/%.
An Improved Upsampling-free Kramers-Kronig Receiver for Low Carrier-to-Signal Power Ratio
Authors: Luo Shiwei , Li Jianping , Yu Xinkuo , Qin Yuwen , Xiang Meng , Fu Songnian
Published: September 2024

An improved upsampling-free Kramers-Kronig receiver has been proposed in which 0.8dB CSPR reduction can be realized for the 40GBaud 16-QAM signal after 80km transmission with a comparison of the typical KK receiver without digital upsampling.
Self-Induced Optical Nonlinear-Nonlocal Effect and Short-Term Memory for Chip-Scale Reservoir Computing
Authors: Gao Chengkuan , Gaur Prabhav , Rubin Shimon , Fainman Yeshaiahu
Published: September 2024

We demonstrate nonlinear and nonlocal optical phase change effects due to thermocapillary deformation of thin liquid film interacting with photonic mode in silicon photonic waveguide. The interaction allows storing information in the liquid film, achieving short term memory, and implementing compact chip-scale Reservoir Computing (RC)
Compact and power-efficient thermo-optic phase shifter using strongly over-coupled resonators in tandem
Authors: Hu Gaolei , Tsang Hon Ki
Published: September 2024

We propose and experimentally demonstrate a compact thermo-optic phase shifter using strongly over-coupled resonators in tandem. The device consumes 2.2 mW for 2π phase shift with a modulation dependent loss of 0.5 dB.
Deep recurrent neural networks operations based on stimulated Brillouin scattering
Authors: Becker Steven , Cabello Jesús Humberto Marines , Englund Dirk , Stiller Birgit
Published: September 2024

We experimentally demonstrate eight layers of a recurrent operator for photonic neural networks using stimulated Brillouin scattering. The programmable optoacoustic building block captures and processes coherently and frequency-selectively information without relying on artificial reservoirs.
Soliton Frequency Combs via Cascaded Brillouin Scattering
Authors: Zhang Hao , Zhang Shuangyou , Bi Toby , Ghalanos George , Zhang Yaojing , Yan Haochen , Pal Arghadeep , He Jijun , Pan Shilong , Del’Haye Pascal
Published: September 2024

We present Kerr soliton generation via a forward propagating second order Brillouin scattering process in a microresonator. The solitons repetition rates are independent from the Brillouin gain frequency shift (~10 GHz in fused silica).
Maniputing Brillouin Scattering on Chip Using Suspended Anti-resonant Acoustic Waveguides
Authors: Lei Peng , Xu Mingyu , Bai Yunhui , Chen Zhangyuan , Xie Xiaopeng
Published: September 2024

Inspired by the anti-resonant properties of hollow-core fibers, we introduce suspended anti-resonant acoustic waveguides for on-chip phonon confinement and selection. It enables record-breaking achievements in forward and backward Brillouin scattering on a chip-scale.
50fs, VIS and NIR Tunable Femtosecond Pulses via Hollow Core Fibre spectral broadening of sub-ps Yb lasers
Authors: Abdolghader Pedram , Ivanov Maksym , Doiron Étienne , Scaglia Marco , Jeong Young-Gyun , Labranche Alexis , Tempea Gabriel , Légaré François , Razzari Luca , Vampa Giulio , Schmidt Bruno E
Published: September 2024

Starting from a 330fs Yb laser, we generate 50fs femtosecond VIS pulses (340-580 nm) and in the NIR (1600-2500 nm) via frequency mixing of spectral side lobes out of a hollow core fibre continuum.
Dual-Comb Spectroscopy in the Deep Ultraviolet
Authors: McCauley John J. , Zhang Yu , Weeks Reagan R. D. , Harilal Sivanandan S. , Phillips Mark C. , Jones R. Jason
Published: September 2024

Time-resolved dual-comb spectroscopy was performed at the shortest wavelengths to date in the deep ultraviolet. Measurements on laser-produced plasmas provide both atomic and ion number densities while spectral analysis yields temperature and electron density evolution.
Hz-level Broadband Spectroscopy with a Dual-Modulated Tunable Diode Laser
Authors: Zhang Shuangyou , Bi Toby , Del’Haye Pascal
Published: September 2024

We demonstrate Hz-level broadband spectroscopy using a dual radio frequency modulated diode laser referenced to a fiber cavity. This approach offers great simplicity, robustness and low costs, making it well-suited for out-of-the-lab applications.
Supermode-dependent Modulation Instability in Dual-Core Fiber Cavities
Authors: Shishavan Negar Shaabani , Shi Minji , Mussot Arnaud , Conforti Matteo , Perego Auro M.
Published: September 2024

This work explores nonlinear dynamics in dual-core fiber resonators by means of two coupled Lugiato-Lefever equations uncovering peculiar bistability features and supermode dependent modulation instability gain.
Synchronisation of Breather Molecular Complexes in a Laser Cavity
Authors: Wu Xiuqi , Peng Junsong , Boscolo Sonia , Finot Christophe , Zeng Heping
Published: September 2024

We report on the experimental and numerical observations of subharmonic synchronisation and desynchronisation of breather molecular complexes in an ultrafast fibre laser. We also unveil an intermediate regime featuring self-modulation of the synchronised state.
Soliton Self-Frequency Shift of μJ-Level Pulses at MHz Repetition Rates for Tunable and Broadband THz Generation Using an Organic Crystal
Authors: Lippl Markus , Couture Nicolas , Butryn Martin , Menard Jean-Michel , Joly Nicolas Y. , Tani Francesco
Published: September 2024

We present a tunable light source based on soliton self-frequency shift in hydrogen filled hollow-core fibers with record breaking pulse energy and use it to pump a DSTMS crystal for efficient and broadband terahertz generation.
Fiber-Interferometric Second Harmonic Generator for Dual-Color Standard Quantum-limited Noise Suppression
Authors: Edelmann Marvin , Pergament Mikhail , Hua Yi , Sedigheh Malek M. , Kärtner Franz X.
Published: September 2024

We present a novel fiber-interferometric mechanism that employs controlled nonlinear polarization rotation in interaction with type-I phase matched SHG to generate dual-color optical pulse trains (515/1030 nm) with concurrent >14 dB standard-quantum limited noise suppression.
A Crown Ether Decorated Silicon Photonic Platform to Safeguard Against Lead Poisoning in Society
Authors: Ranno Luigi , Tan Yong Zen , Ong Chi Siang , Guo Xin , Koo Khong Nee , Li Xiang , Wang Wanjun , Serna Samuel , Liu Chongyang , Rusli  , Littlejohns Callum , Reed Graham , Hu Juejun , Wang Hong , Sia Jia Xu Brian
Published: September 2024

Lead poisoning is an ongoing public health crisis. We present the foremost development of a lead-selective crown ether/silicon photonic platform. We envisage the potential application of this technology to safeguard against pervasive societal lead poisoning.
Real-time Identification of Trace Gases at Ppb Level by Dispersive Mid-infrared Spectroscopy
Authors: Endo Tsubasa , Tani Shuntaro , Komeda Osamu , Suto Hiroyuki , Saitoh Hiroaki , Kobayashi Yohei
Published: September 2024

We achieved detection of molecules in trace gases within 1 second by dispersive mid-infrared spectroscopy with detection limits of 1 ppb for methane, 1 ppb for ethane, and 10 ppb for ethylene.
Fiber-coupled waveguide-enhanced Raman spectroscopy of trace vapors
Authors: Tyndall Nathan F. , Butt Jordan N. , Walsh Kyle J. , Emmons Erik D. , Hung Kevin , Roese Erik , Wilcox Phillip G. , Guicheteau Jason A. , Pruessner Marcel W. , McGill R. A. , Striemer Christopher C. , Pennington Graham S. , Stievater Todd H.
Published: September 2024

We report the first Raman detection of trace vapors with a fiber-attached photonic integrated circuit. We detected DMSO and MeS vapor with waveguide-enhanced Raman spectroscopy (WERS) using integrated edge couplers, lattice filters, and sensing trenches.
Single 5-nm particle photothermal microscopy with microtoroid optical resonators
Authors: Hao Shuang , Su Judith
Published: September 2024

Fluorescence detection suffers from limited fluorophore availability, bleaching, and blinking. We detect single 5-nm quantum dots with a signal-to-noise ratio of 104 using a label-free FLOWER based photothermal microscopy approach.
Wobulation in structured illumination microscopy using a tunable electrowetting prism
Authors: Saladrigas Catherine A. , Miscles Eduardo J. , Kumar Vikrant , Kymissis Ioannis , Bright Victor M. , Gopinath Juliet T.
Published: September 2024

We demonstrate a new implementation of structured illumination microscopy, in which a tunable electrowetting prism is incorporated in the microscope to “wobulate” the structured illumination on the sample. Optical sectioning is demonstrated with fluorescent beads.
Self-referenced mid-infrared frequency comb using a silicon-carbide nanophotonic waveguide
Authors: Xu Bingxin , Deniel Lucas , Guidry Melissa A. , Lukin Daniil M. , Pilat Jérémie , Yang Ki Youl , Yang Joshua , Vučković Jelena , Hänsch Theodor W. , Picqué Nathalie
Published: September 2024

A dispersion-engineered SiC waveguide on a photonic chip simultaneously provides an f-2f interferometer and mid-infrared dispersive-wave frequency-comb generation at 120-pJ pulse energies. Accurate comb-assisted tunable-laser molecular spectroscopy is demonstrated at 3.6 μm.
A 10 MHz repetition rate Er:fiber laser frequency comb
Authors: Wu Tsung-Han , Diddams Scott A.
Published: September 2024

We present a low-noise Er:fiber laser frequency comb at 10 MHz repetition rate. Self-referencing with nanophotonic lithium niobate waveguides requires only 3 mW of optical power and electrical power of 540 mW.
Inverse Design of Digital Mode (De)multiplexer with Large Fabrication Tolerance Using the Modified Adjoint Method
Authors: Wang Kaiyuan , Li Yunlong , Hu Qiaomu , Liu Deming , Zheng Shuang , Zhang Minming
Published: September 2024

A three-channel mode (de)multiplexer with fabrication tolerance using the Modified adjoint method is proposed and experimentally demonstrated, providing insertion losses < 2 dB, crosstalks of < 17 dB and large fabrication tolerance of ±10 nm.
Wide Waveguide Concatenated Euler Bends for Compact and Fabrication Error-Tolerant Pseudo-Single Mode Silicon Photonics
Authors: Kita Shota , Daniel Bedilu , Maegami Yuriko , Ohno Morifumi , Cong Guangwei , Yamamoto Noritsugu , Yamada Koji , Shinya Akihiko , Notomi Masaya
Published: September 2024

We propose novel wide waveguide bends for compact, fabrication error-tolerant silicon photonics. They experimentally show ultrasmall bend loss < 0.005 dB/bend with an 8-um radius. Their 10×10 interferometers show a fidelity of 0.979 without calibration.
Ultrabroadband and Compact Silicon-to-Silicon Nitride Light Couplers
Authors: Ozcan Can , Aitchison J. Stewart , Mojahedi Mo
Published: September 2024

We demonstrate a significant length reduction for silicon- to-silicon nitride light couplers with experimentally measured losses below 0.1 dB over a 200 nm bandwidth for a device length of only 25 µm.
Bound states in the continuum in monolithic van der Waals metasurfaces
Authors: Sortino Luca , Maier Stefan A. , Tittl Andreas
Published: September 2024

We merge bound states in the continuum for strong light-matter interactions and the exceptional properties of van der Waals materials, demonstrating coupling with spin defects in hBN metasurfaces, and self-hybridized exciton-polaritons in WS2 metasurfaces.
Normal-direction Yellow Laser Emission by Quasi-BIC TiO2 Metasurface
Authors: Bashiri Ayesheh , Vaskin Aleksandr , Tanaka Katsuya , Steinert Michael , Rikers Marijn , Weissflog Maximilian A. , Tugchin Bayarjargal N. , Pertsch Thomas , Staude Isabelle
Published: September 2024

We study the lasing action from rhodamine 6G laser dyes integrated with a quasi-BIC TiO2 metasurface supporting high Q-factor resonances. We experimentally observe low threshold lasing (8 nJ) at 568 nm from the integrated system.
Mitigating Electron Beam Induced Defects for Low-Loss and Stable Active Photonic Circuits
Authors: Renaud Dylan , Assumpcao Daniel , Jin Chang , Barton David , Holzgrafe Jeffrey , Powell Keith , Yeh Matthew , Shams-Ansari Amirhassan , Loncar Marko
Published: September 2024

We report on the controlled generation and annihilation of defects in photonic platforms using low-energy electron beams. We show how these defects impact propagation losses and EO-stability in LNOI, and how they can be rectified.
Probing and controlling dynamics in quantum materials with terahertz light waves
Authors: Averitt Richard D.
Published: September 2024

Coherent terahertz waves enable investigations of nonlinear many-body dynamics in quantum materials. Our recent work in this area has focused on condensates in superconductors and excitonic insulators.
Photovoltaic Effect in Ohmic Metal-Semiconductor Structures Excited by Femtosecond Laser Pulses
Authors: Emmert Luke A. , Schmuker Landon , Jalouli Alireza , Addamane Sadhvikas J. , Zarkesh-Ha Payman , Rudolph Wolfgang , Gruzdev Vitaly
Published: September 2024

Photovoltage 2D mapping of low-temperature GaAs metal-semiconductor-metal micro-structures reveals thermovoltaic and photovoltaic effects with the former being the dominant process at high average power for both cw and femtosecond-pulse excitations.
Optical Limiters Based on PT-Symmetry Breaking of Reflectionless Modes
Authors: Riboli Francesco , Kononchuk Rodion , Tommasi Federico , Boschetti Alice , Suwunnarat Suwun , Anisimov Igor , Vitebskiy Ilya , Wiersma Diederik S. , Cavalieri Stefano , Kottos Tsampikos , Chabanov Andrey A.
Published: September 2024

We report optical limiting of single 532-nm 6-ns laser pulses by two coupled optical cavities with a PT-symmetric spectrum of reflectionless modes at fluences above 10 mJ/cm2. The optical limiting is related to broken PT symmetry due to light-induced changes in one of the cavities. At the limiting threshold, the optical limiter quickly becomes highly reflective rather than absorbing, thereby protecting itself from laser-induced damage.
Efficient Single-Photon Upconversion Detection from SWIR to SPAD using PPLN Waveguides
Authors: Smith Ruaridh , Wright Lewis , Pandiyan Krish , Morland Imogen , McCarthy Sarah , Anwar Ali , Davidson Noelia Palomar , Gawith Corin , McKnight Loyd J.
Published: September 2024

We present efficient single-photon upconversion detection from SWIR using a precision-machining waveguide fabrication process that offers high power handling and good mode coupling. We demonstrate an internal photon upconversion efficiency of 69%.
Anomaly Detection of WSS in ROADM Enabled by Single Sideband Multi-Tone Signal
Authors: Zhang Zhuofan , Xue Rui , Dai Longquan , Zhang Ziheng , Li Hongyu , Deng Lei
Published: September 2024

We report an anomaly detection scheme of the wavelength selective switch using a single sideband multi-tone signal and 28.5MHz photodiode. The maximum measurement error of 0.5GHz and maximum error deviation of 0.15GHz are achieved.
Integration of Communication and Vibration Sensing Based on Frequency Pilot Tones in DSCM System Using Commercial 100 kHz ECL
Authors: Yang Bang , Tang Jianwei , Yang Yanfu , Fan Linsheng , Jin Yongchao , Yao Yong
Published: September 2024

Integrated optical communication and vibration sensing in DSCM systems is demonstrated with frequency pilot tones used for signal demodulation and phase-based vibration sensing simultaneously under 100 kHz ECL.
Enhancing Unrepeated Link Transmission by Signal Pre-Distortion in Tailored Fiber and Optical Phase Conjugation
Authors: Pelusi Mark , Schou Christian Koefoed , Matsumoto Ryosuke , Inoue Takashi , Namiki Shu , Oxenløwe Leif K , Galili Michael
Published: September 2024

Pre-compensation of Kerr nonlinearity in unrepeated fiber links is demonstrated by optical phase conjugation and advanced signal pre-distortion fiber designs. Improved Q
2
-factor by up to 3.7 dB is achieved for WDM 5×8 Gbaud DP 16-QAM signals in 224 km standard fiber.
Rate-adaptive Long-haul Transmission with Semiconductor Optical Amplifiers for In-line Amplification
Authors: Swain Smaranika , Schou Christian Koefoed , Yankov Metodi P. , Galili Michael , Oxenløwe Leif Katsuo
Published: September 2024

We investigate off-the-shelf semiconductor optical amplifiers for long-haul transmission and find error-free performance after 2400 km of 7×WDM, polarization division multiplexed 32-Gbaud probabilistically-constellation-shaped 16 and 64-QAM rate-adaptive signal in a recirculating loop system.
Lasers for Fusion
Authors: Roth Markus
Published: September 2024

With the science of laser fusion proven, the transition into a working power plant still is a challenge of similar size. One key aspect is the development of efficient, high-repetition rate lasers that meet the demand to ignite a million fusion capsules a day.
100Hz Joule class ultra-short pulses TiSa laser
Authors: Pellegrina A. , Kabacinski A. , Jeandet A. , Leroux V. , Lavenu L. , Chalus O. , Casagrande O. , Simon-Boisson C. , Besaucèle H.
Published: September 2024

Joule class lasers at 100Hz with ultra-short pulse involve a lot of challenges to manage thermal issues in the amplifiers as well as in the compressors. Recent results achieved in this direction are presented.
Loss-free shaping of few-cycle terawatt-scale pulses at 1 kHz
Authors: Railing L. , Le M. , Lazzarini C , Milchberg H.
Published: September 2024

We demonstrate pulse shaping of few-cycle terawatt-scale pulses without energy loss. In particular, we demonstrate double few-cycle pulse generation with pulse separations as short as ~10 fs.
A yoctosecond-precision timing detector
Authors: Wang Tong , Sun Chongwu , Li Mingzhe , Zhang Yi , Yang Jie , Shen Yulin , Xin Ming
Published: September 2024

We experimentally presented a yoctosecond-precision timing detector based on electro-optic modulators. The minimum detection floor is 2.35×10-15 fs2/Hz and a large dynamic range of 127.78 dB is achieved with 1.5 mW input optical power.
Dual-Comb UV Spectroscopy Based on High Harmonic Generation from Cr:ZnS Laser Combs
Authors: Muraviev Andrey , Konnov Dmitrii , Smirnov Vadim , Vasilyev Sergey , Vodopyanov Konstantin L.
Published: September 2024

We have demonstrated high-resolution dual-comb spectroscopy in the UV region (326– 343 and 372–408 nm), simultaneously resolving up to 900,000 comb modes spaced by 80 MHz in a single measurement.
Shot-Noise Limited Interferometry of a Dual-Comb Supercontinuum Source Generated from a Single ANDi Fiber
Authors: Camenzind S. L. , Rampur A. , Sierro B. , Willenberg B. , Heidt A. M. , Keller U. , Phillips C. R.
Published: September 2024

We report shot-noise limited and coherently-averaged dual-comb interferometry from a watt-level gigahertz supercontinuum source. Both combs are generated in the same free-running laser cavity arrangement and directly coupled into a single all-normal-dispersion photonic crystal fiber.
All-Polarization-Maintaining, Polarization Multiplexed, All-Fiber Dual-Comb Laser
Authors: Lv Yuanyuan , Li Yihan
Published: September 2024

We present an all-polarization-maintaining, polarization multiplexed, dual-comb all fiber laser based on a nonlinear amplifying loop mirror and gain sharing.
Diffraction-free Orbital Angular Momentum Holography Enabled by an Extended Depth-of-focus Flat Lens
Authors: Lin Dajun , Lu Ping , Majumder Apratim , Menon Rajesh
Published: September 2024

In this paper, we apply the extended-depth-of-focus (EDOF) flat lens to holography and demonstrate a new concept of diffraction-free Orbital Angular Momentum (OAM) multiplexing holography assisted by the EDOF lens with 20 mm depth-of-field.
Slanted Wire Diffraction Gratings Fabricated by Two-Photon Polymerization
Authors: Stinson Victoria Paige , Subash Uma , Shuchi Nuren , Poutous Menelaos K. , Hofmann Tino
Published: September 2024

Slanted wire diffraction gratings are difficult to fabricate using conventional etching approaches, due to their off-axis symmetry. In this study, we present the first fabrication of slanted wire diffraction gratings by two-photon polymerization and verify the diffractive characteristics.
High Efficiency Fiber-Chip Edge Coupler for Near-Ultraviolet (NUV) Waveband
Authors: Du Yuhan , Ji Xingchen , Xie Weiqiang , Tian Meng , He Yu , Su Yikai
Published: September 2024

We design and experimentally demonstrate an efficient fiber-chip edge coupler for NUV using symmetric double-tip taper and MMI-based coupler. We measure the coupling loss down to 2.85 dB at 407 nm on an alumina-on-insulator platform.
Quantum correlations in multimode nonlinear optics
Authors: Uddin Shiekh Zia , Sloan Jamison , Rivera Nicholas , Pontula Sahil , Salamin Yannick , Birk Michael , Sidorenko Pavel , Kaminer Ido , Soljačić Marin
Published: September 2024

We develop a framework describing quantum noise propagation in highly spatially multimode nonlinear optical systems. We predict quantum deviations of the spatial intensity noise distribution from the spatial power distribution, and observe this effect experimentally.
Continuous Ultraviolet to Blue-Green Astrocomb
Authors: Cheng Yuk Shan , Dadi Kamalesh , Mitchell Toby , Thompson Samantha , Piskunov Nikolai , Blanchard-Emmerson Greg , Gawith Corin B. E. , McCracken Richard A. , Reid Derryck T.
Published: September 2024

Broadband UV-green generation is achieved from a 1-GHz Ti:sapphire frequency comb using a Zn-indiffused, grating-engineered MgO:PPLN ridge waveguide. Etalon-filtering produces a 30 GHz astrocomb from 390–480 nm, with modes resolvable by an Echelle-prism spectrograph.
Direct Laser Frequency Comb Calibration of an Astronomical Spectrograph
Authors: Newman William , Slattery Jamie , Mitchell Toby , McCracken Richard A. , Reid Derryck T.
Published: September 2024

By measuring the optical frequency of an isolated astrocomb mode, we obtain the complete wavelength solution of an astronomical spectrograph with 150-MHz accuracy, eliminating the need for pre-calibration with a hollow-cathode lamp or single-frequency laser.
Two-Photon Dual-Comb LiDAR for Non-Cooperative Targets
Authors: Wright Hollie , Nelmes Alexander J. M. , Weston Nick J. , Reid Derryck T.
Published: September 2024

We demonstrate two-photon dual-comb LiDAR ranging to various non-cooperative targets using amplified detection. Although our metal targets return very weak reflections, we show measurement precisions <200 nm can be achieved with 500 ms of averaging.
Enhanced Sensitivity of Refractive-Index-Sensing Optical Comb by Frequency Multiplication based on THz Comb
Authors: Higaki M. , Miyamura S. , Taue S. , Tokizane Y. , Hase E. , Minamikawa T. , Yasui T.
Published: September 2024

Refractive-index-sensing optical comb is capable of RF-reading high-precision refractive index (RI) measurements. To amplify the RI-dependent frequency shift, we report a method for frequency multiplication of the RF sensor signal based on THz comb.
High-energy Fiber-delivered Ultrashort Pulses on Demand
Authors: Wahl Michael , Qing Yuanchi , Silfies Myles , Allison Thomas
Published: September 2024

We describe a nonlinear Er:doped fiber amplification scheme for producing fiber-delivered, 44 fs pulses with 100 kW peak power at arbitrary (0-60 MHz) repetition rate. Subsequent spectral broadening produces 80 THz of bandwidth.
24-fs pulses from a Kerr-lens mode-locked Yb:Sc2SiO5 laser
Authors: Lin Zhang-Lang , Li Zhi-Qiang , Zeng Huang-Jun , Zhang Ge , Zheng Lihe , Zhang Zhen , Su Liangbi , Liu Shande , Loiko Pavel , Mateos Xavier , Petrov Valentin , Chen Weidong
Published: September 2024

Soliton pulses as short as 24 fs are generated from a diode-pumped Kerr-lens mode-locked Yb:Sc2SiO5 laser at 1077.2 nm with an average power of 63 mW at a repetition rate of ~66.1 MHz.
Diode-pumped sub-100-fs SESAM mode-locked Tm,Ho:CLNGG laser at 2090 nm
Authors: Suzuki Anna , Wang Yicheng , Tomilov Sergei , Pan Zhongben , Saraceno Clara J.
Published: September 2024

We present a diode-pumped SESAM mode-locked Tm, Ho:CLNGG laser operating at 2090 nm, representing the first demonstration of an affordable diode-pumped sub-100-fs mode-locked laser in the 2-µm wavelength range.
Dynamically encircling exceptional points in a 3D photonic chip for robust all-optical logic operations
Authors: Li Chu , Li Meng , Wang Ruiqi , Chen Yang , Ren Xifeng , Yan Linyu , Li Qiang , Gong Qihuang , Li Yan
Published: September 2024

We realize an on-chip eigenstate generator using a depth-varying 3D waveguide to overpass the encircling exceptional point (EEP) system. By combining two such generators, both the robust all-optical XOR and OR logic operations are achieved.
Generation of low-phase noise K-band microwave signal using free-running integrated soliton microcombs
Authors: Aldhafeeri Alwaleed , Chin Hsiao-Hsuan , Melton Tristan , Wong Chee Wei
Published: September 2024

We demonstrate the generation of low-phase noise K-band microwave signal(-137dBc/Hz@100kHz) using an integrated Silicon-Nitride soliton microcomb with a 20 GHz free spectral range without any active stabilization of the repetition rate nor pump-cavity detuning.
Photonics integrated circuits for distributed radar systems in space
Authors: Gemmato V. , Pandey G. , Rinaldi L. , Porzi C. , Camponeschi F. , Amir H. , Maresca S. , Malacarne A. , Reza M. , Imran M. , Ghelfi P. , Scaffardi M. , Bogoni A.
Published: September 2024

A hybrid photonic integrated circuit enabling distributed multiband coherent MIMO radar systems for Earth observation from space is implemented. The characterization at device-level shows performances enabling the target application.
Evanescently Coupled Waveguide Uni-Travelling Carrier Photodiodes with Wide Bandwidth and High Responsivity
Authors: Sun Mingwei , Xiong Bing , Sun Changzheng , Hao Zhibiao , Wang Jian , Wang Lai , Han Yanjun , Li Hongtao , Gan Lin , Luo Yi
Published: September 2024

Evanescently coupled waveguide uni-travelling carrier photodiodes utilizing multi-layer coupling waveguide structure has been proposed. Wide bandwidth of 120 GHz and high responsivity of 0.50 A/W at −1 V bias have been demonstrated without spot-size converters.
Kerr optical frequency division with SiN-based photonics for low noise mmWave generation
Authors: Sun Shuman , Harrington Mark , Tabatabaei Fatemehsadat , Hanifi Samin , Wang Beichen , Yang Zijiao , Liu Kaikai , Wang Jiawei , Liu Ruxuan , Morgan Jesse S. , Bowers Steven , Morton Paul , Nelson Karl , Beling Andreas , Blumenthal Daniel , Yi Xu
Published: September 2024

Kerr optical frequency division is demonstrated with SiN-based reference cavity and soliton. Stable 110 GHz mmWave is generated, and the measured phase noise reaches record-low level at 10 kHz offset for integrated photonic microwave/mmWave os-cillators.
An Octave-Spanning Near-Infrared Frequency Comb Broadened by Si-SiO2-Si Horizontal Slot Waveguide
Authors: Sato Ryosuke , Kou Rai , Ishizawa Atsushi , Yamamoto Noritsugu , Cong Guangwei , Murai Toshiya , Maegami Yuriko , Atsumi Yuki , Yamada Koji , Kita Tomohiro
Published: September 2024

We have measured the coherence of supercontinuum-generated light in a Si-SiO2-Si horizontal slot waveguide formed by μ-Transfer Printing. SNR of beat about 20 dB was observed at 1630 nm.
Modeling and characterization of cooperative effects in ensembles of inhomogeneous solid-state emitters
Authors: Zahedian Maryam , Wu Wenxin , Zhou Qingyi , Cambria Matthew C. , Dolde Jonathan , Titze Michael , Bielejec Edward , Kolkowitz Shimon , Yu Zongfu , Choy Jennifer T.
Published: September 2024

We propose a platform for the study of collective emission in a solid-state system, consisting of silicon-vacancy (SiV) centers implanted in subwavelength ordered arrays. Numerical simulations of emitter-emitter interactions, fabrication, and preliminary characterization are presented.
Strain and Defect Contributions towards Photoluminescence in AgScP2S6
Authors: Mukherjee Abhishek , Wlodarczyk Damian , Somakumar Ajeesh , Sybilskirk Piotr , Blevins Morgan , Polking Mark , Susner Michael A. , Suchocki Andrzej , Boriskina Svetlana V.
Published: September 2024

We show experimentally that structural defects in metal thiophosphate AgScP2S6 are prominent in exhibiting photoluminescence, which is likely driven by the defect-state-to-bulk-band transitions and can be further tuned by temperature-induced strain gradients.
Desensitizing Self-trapped Excitonic Emission in Bi-Ho Co-doped Cs2AgInCl6 Nanocrystals
Authors: Ahmed Md Soif , Barman Chinmay , Banerji Natalie , Raavi Sai Santosh Kumar
Published: September 2024

Under the excitation of 370 nm, the photophysics of Bi-Ho co-doped double perovskite nanocrystals is revealed here. Temperature-dependent photoluminescence has been studied to explore their self-trapped exciton and exciton-phonon coupling properties.
Identifying the optimal molecular gas in a quantum cascade laser pumped molecular laser
Authors: Chevalier Paul , Autric Amaury , Capasso Federico , Everitt Henry O.
Published: September 2024

We present an improved numerical model for quantum cascade laser pumped molecular lasers (QPMLs) and present predictions of QPML performance for various molecular gases such as OCS, NH3, N2O, CH3F, HCN or H2O.
Broad Angle Resolver for THz Band
Authors: Amarasinghe Yasith , Guerboukha Hichem , Shiri Yaseman , Shrestha Rabi , Klarskov Pernille , Mittleman Daniel M.
Published: September 2024

We design a broad angle receiver using a leaky parallel plate waveguide by manipulating the plate separation. The device operates at 200 GHz, has a broad angle of acceptance and can resolve the received angle.
3 THz Frequency Synthesizer with Hz Stability
Authors: Heffernan Brendan M. , Greenberg James , Rolland Antoine
Published: September 2024

We use a 10 GHz electro-optic frequency comb and a 300 GHz dissipative Kerr soliton to synthesize a 10 MHz clock reference to 3 THz with an out-of-loop instability starting at 8 × 10
−
13 at 1 second.
Optimization of an electromagnetically induced transparency (EIT)-based vector atomic magnetometer
Authors: Maldonado Mario Gonzales , Zimmerman Chester , Rollins Owen , Toyryla Alex , Matsko Andrey , McKelvy Jamie , Fan Isaac , Wang Ying-Ju , Kitching John , Novikova Irina , Mikhailov Eugeniy E.
Published: September 2024

We optimize various experimental parameters to improve the sensitivity of magnetic field measurements based on lin||lin EIT resonances. We achieve scalar magne-tometer sensitivity
<3pT/Hz in a 100 mm3 vapor cell and demonstrated vector measurements capabilities.
A sub-volt near-IR lithium tantalate electro-optic modulator
Authors: Powell Keith , Renaud Dylan , Li Xudong , Assumpcao Daniel , Xin C. J. , Sinclair Neil , Lončar Marko
Published: September 2024

We demonstrate an integrated electro-optic Mach-Zehnder modulator in thin-film lithium tantalate at 737 nm with record low V
π
L of 0.65 Vcm. An extinction ratio of 30 dB and a detector-limited operating bandwidth of 20 GHz was measured.
High-energy Spatiotemporal Self-Mode-locked Fiber Laser
Authors: Zhang Zihao , Zhang Yang , Duan Xinghao , Zhang Yi , Dong Yue , Wang Junli
Published: September 2024

We demonstrate an all-fiber spatiotemporal self-mode-locked fiber laser with 4.23 nJ high pulse energy and 74 mW low mode-locked threshold. The soliton pulse is obtained with multimode beam profiles and clear Kelly sidebands.
Suppressing Stimulated Brillouin Scattering in Multimode Fiber Amplifier With High Beam Quality Via Full-Field Wavefront Shaping
Authors: Rothe Stefan , Chen Chun-Wei , Ahmadi Peyman , Wisal Kabish , Ercan Mert , Stone A. Douglas , Cao Hui
Published: September 2024

We propose an efficient method of maintaining high beam quality of a highly multimode fiber amplifier by full-field wavefront shaping of a coherent seed. This approach strongly suppresses the stimulated Brillouin scattering through multimode excitation.
Suppressing Nonlinear Instabilities in Multimode Fibers via Wavefront Shaping
Authors: Wisal Kabish , Chen Chun-Wei , Ahmadi Peyman , Rothe Stefan , Cao Hui , Stone A. Douglas
Published: September 2024

We demonstrate a general and powerful approach based on coherent multimode excitation to suppress various nonlinear instabilities in optical fibers, including stimulated Brillouin scattering (SBS) and transverse mode instability (TMI).
Compact and Thermal-Noise-Limited Optical Reference Cavity Operated in Air
Authors: Liu Yifan , Lee Dahyeon , McLemore Charles A. , Kelleher Megan , Nakamura Takuma , Jin Naijun , Schima Susan , Rakich Peter , Diddams Scott A. , Quinlan Franklyn
Published: September 2024

We present a vacuum-gap, compact Fabry-Pérot ultrastable optical reference cavity that operates without a vacuum enclosure. A laser stabilized to the cavity exhibits low, thermal noise-limited phase noise and 5×10-14 Allan deviation at 1 second.
>1.5 Octave-broad Optical Frequency Comb for Multi-clock Comparisons and Wide-band Spectral Purity Transfer
Authors: Lompe Thomas , Woschnik Phillip , Schlichting Kerstin , Lago-Rivera Dario , Wu Yuanjie , Steinmetz Tilo , Fricke Andreas , Fischer Marc , Giunta Michele , Holzwarth Ronald
Published: September 2024

We present a system composed of an Er:laser-based ultra-low-noise frequency comb seeding a custom-designed photonic-crystal fiber with 2nJ pulse energies. A super-continuum is obtained spanning from 650nm to 2µm. System qualifications will be presented.
Modular Fiber Laser Platform for Strontium Atomic Clocks
Authors: Pertoldi Andrea , Jha Abhilash , Hauge Jakob M. , Varming Poul , Singh Yeshpal , Montague Patrick B.
Published: September 2024

A modular laser platform for an industry-ready strontium atomic clock is developed. Two approaches to reach strontium wavelengths based on thulium-doped fiber lasers are demonstrated, together with a full integration of the new laser system.
A SPIDER Technique Based on Nonlinear Kerr Effect for Characterizing Ultrashort UV Laser Pulses
Authors: Chen Yu-hsin , Jones Theodore G.
Published: September 2024

We describe our measurements of nonlinear refractive index with spectral interferometry (SI) at 400 nm wavelength. We also propose a novel SPIDER apparatus based on Kerr effect for ultrafast pulse characterization at wavelengths including UV.
Transmissive metasurface quarter-wave plate for few-femtosecond pulses at deep ultraviolet wavelengths
Authors: Kaassamani Shatha , Chapkin Kyle , Song Junyeob , Agrawal Amit , Lezec Henri , Zhu Wenqi
Published: September 2024

We design and fabricate transmissive dielectric metasurfaces made of high-aspect-ratio, wide-bandgap oxide materials to achieve λ/4 retardance at deep ultraviolet wavelengths. We optimize the design towards a broadband quarter-wave plate for few-femtosecond pulses.
Low-Temperature Sputtered Ultralow-Loss Silicon Nitride for Integrated Photonics
Authors: Zhang Shuangyou , Bi Toby , Harder Irina , Lohse Olga , Gannott Florentina , Gumann Alexander , Butzen Eduard , Zhang Yaojing , Del’Haye Pascal
Published: September 2024

We demonstrate ultralow-loss, high-thickness silicon nitride waveguides and microresonators based on room-temperature sputtering. We reach propagation losses of 3.5 dB/m after 800 °C annealing, enabling ring resonators with optical quality factors >10 million.
Compact, low loss, and high-speed GeSi quantum-confined stark-effect electro-absorption modulator
Authors: Kandeel Ahmed , Hiblot Gaspard , Shimura Yosuke , Porret Clement , Yudistira Didit , Vaskasi Javad Rahimi , Milenin Alexey , Tseng Chih-Kuo Neil , Berciano Mathias , Malik Dharmander , Van Thourhout Dries , Chakrabarti Maumita , Velenis Dimitrios , Verheyen Peter , Ban Yoojin , Ferraro Filippo , Van Campenhout Joris
Published: September 2024

We present 50 GHz O-band GeSi quantum confined stark effect electroabsorption modulators integrated in a 300 mm Si photonics platform with improved integration flow to reduce wafer-scale insertion loss.
Cascadable Optical Nonlinear Activation Function
Authors: Zhao Baiheng , Wu Bo , Zhou Hailong , Dong Jianji
Published: September 2024

We have presented an easily fabricated, cascadable optical nonlinear activation function device and developed a self-compensation scheme based on it. This approach significantly enhances the performance of optical neural networks in complex classification tasks.
Nanophotonic Metastructures for Green-Yellow Emission from Non-Planar InGaN Quantum Wells
Authors: Malek Stephanie C. , Wood Michael G. , Sovinec Courtney L. H. , Rice Anthony , Lee Stephen R. , DeJong Elizabeth , Feezell Daniel , Serkland Darwin K.
Published: September 2024

We demonstrate high-efficiency emission at wavelengths longer than 540 nm from InGaN quantum wells regrown on periodic arrays of GaN nanostructures and explore their incorporation into nanophotonic resonators for semiconductor laser development.
Low-Phase-Noise Frequency-Agile Hybrid Integrated Laser Offering Highly Linear Tuning for FMCW LiDAR
Authors: Peng H. , Chen Y. , Lopez I. Robles , Lihachev G. , Tian H. , Voloshin A. , Riemensberger J. , Maier P. , Skacel S. , Lauermann M. , Attanasio A. , Randel S. , Freude W. , Bhave S. , Kippenberg T. J. , Koos C.
Published: September 2024

We demonstrate piezo-tunable hybrid integrated lasers offering linewidths below 100 Hz along with highly linear and fast frequency tuning. For a tuning range of 1 GHz, residual nonlinearities are below 0.07 %, allowing for 5 cm ranging precision in an FMCW LiDAR demonstration.
A large-scale coherent imager with digital beamforming
Authors: Gurses Volkan , Sarkar Debjit , Khachaturian Aroutin , Fatemi Reza , Hajimiri Ali
Published: September 2024

We showcase a 128-element nanophotonic coherent imager with a parallelized readout. This architecture enables single-shot coherent optical imaging without the need for on-chip phase shifting and beam scanning. Using 6 elements, we demonstrate digital beamforming and coherent image reconstruction with a 1.67° beamwidth over an 8.30° field-of-view.
Ge2Sb2Se4Te Phase Change Material Monolithic Platform for Integrated Photonics
Authors: Acharjee Niloy , Sun Hongyi , Ghosh Siddhartha , Ríos Ocampo Carlos A.
Published: September 2024

We demonstrate a monolithic Ge2Sb2Se4Te platform for tunable photonic integrated circuits. We fabricated and measured various on-chip components, including waveguides with preliminary 55.7±3.65 dB/cm propagation loss. Refractive index tuning is demonstrated via post-fabrication localized crystallization.
Controllable multi-level switching of optical phase change materials via microheater temperature profile engineering
Authors: Sun Hongyi , Lian Chuanyu , Vásquez-Aza Francis , Huang Yi-Siou , Vitale Steven A. , Takeuchi Ichiro , Hu Juejun , Youngblood Nathan , Pavlidis Georges , Ríos Ocampo Carlos A.
Published: September 2024

We demonstrate doped-silicon-on-insulator microheaters with triangle-like temperature profiles. Such devices control the hotspot size and temperature and, thus, the area that undergoes amorphization or crystallization in optical phase-change materials, leading to controllable multi-level, nonvolatile response.
Reconfigurable SiGe waveguide using Sb2S3 phase-change material in the mid-IR
Authors: Biegański Adam , Perestjuk Marko , Armand Rémi , Torre Alberto Della , Laprais Capucine , Saint-Girons Guillaume , Reboud Vincent , Hartmann Jean-Michel , Tortai Jean-Hervé , Moreau Antonin , Lumeau Julien , Mitchell Arnan , Nguyen Thach , Monat Christelle , Cueff Sébastien , Grillet Christian
Published: September 2024

We study the Sb2S3 optical index in the mid-IR and integrate in onto a SiGe-on-Si waveguide, introducing low additional propagation loss below 1 dB/cm between 3.3 and 3.9 µm regardless of the phase.
Waveguide laser fabricated in Er:YAG ceramics by femtosecond direct laser writing
Authors: Sumiya Taishi , Tani Shuntaro , Tsunoda Akihiro , Nakazaki Masato , Kobayashi Yohei
Published: September 2024

High-quality optical-graded Er-doped YAG ceramics are fabricated, and waveguide structures are written in the ceramics by femtosecond direct laser writing method. These waveguide lasers successfully lased at a wavelength of 1645 nm.
Laser Induced Reversible Phase Transition of Sb2S3 for Tunable Nanophotonics
Authors: Laprais Capucine , Berguiga Lotfi , Zrounba Clément , Bouvier Julien , Baboux Nicolas , Girons Guillaume Saint , Cueff Sébastien
Published: September 2024

We experimentally demonstrate the all-optical reversible switching of Sb2S3, an emerging phase change material suitable for low-loss active nanophotonics. We then propose approaches to optimize this local, multi-level and reversible phase transition using multiphysics considerations.
On-chip integrated terahertz sensing platform for biomolecules
Authors: Xu Xitan , Lu Yao , Jiang Xinda , Wu Qiang , Xu Jingjun
Published: September 2024

We present an integrated terahertz sensing platform on lithium niobate chips, with antenna arrays that guide terahertz waves transmission and enhance interaction with biomolecules. Its sensing performance is demonstrated through spectrum and dispersion relations.
Introducing defects in metal-wire waveguides for broadband terahertz signal processing
Authors: Ghazialsharif Mohammad , Dong Junliang , Vorobiov Anton , Kip Detlef , Morandotti Roberto
Published: September 2024

We demonstrate a terahertz plasmonic signal processor by introducing defects into a two-wire waveguide. The defects are achieved by connecting two multiscale structures with inverted unit cells, leading to the occurrence of a transmission peak in the forbidden band.
Foveation for Enhancing Deep Tissue Imaging
Authors: Balaji Muralidhar M. , Ahsanullah Danyal , Rangarajan Prasanna
Published: September 2024

The work proposed in this submission combines ideas from the operation of human visual systems and computational imaging to optimally allocate sampling resources and improve the sampling density of diffuse optical imaging methods.
Raman-shifting of Microjoule-Energy, 300-fs Pulses in the Anomalous-Dispersion Regime in N2-Filled Hollow Fiber
Authors: Eisenberg Yishai , Chen Yi-Hao , Haig Henry , Antonio-Lopez Enrique , Amezcua-Correa Rodrigo , Wise Frank
Published: September 2024

We study the evolution of 300-fs pulses at 1030 nm in anti-resonant fiber hollow-core fiber filled with N2 in the anomalous-dispersion regime. Experimental results are compared to numerical simulations.
Microring Modulation-and-Weight Banks
Authors: Zhang Weipeng , Zhang Jiawei , Lederman Joshua C. , Shastri Bhavin J. , Prucnal Paul
Published: September 2024

For photonic neural networks, we propose a novel microring bank with carrier-effect and thermal dual-tunability, which can 1) combine modulating and weighting for saved space, 2) improve tuning efficiency, and 3) inherit WDM-enabled scalability.
Transfer Printing of GaAs-based Amplifiers on a-Si:H Waveguides for Evanescently-Coupled Light Amplification in the Near-Infrared Band
Authors: Akritidis Konstantinos , Billet Maximilien , Kiewiet Max , Fricke Jörg , Wenzel Hans , Koester Jan-Philipp , Knigge Andrea , Neutens Pieter , Jansen Roelof , Brouckaert Joost , Van Dorpe Pol , Weyers Markus , Kuyken Bart
Published: September 2024

We demonstrate 7-dB light amplification at 921 nm by transfer-printing a GaAs-based amplifier on a a-Si:H waveguide. This paves the way towards the development of evanescently-coupled integrated laser systems on SiN emitting in the near-infrared.
Flexible Integrated Photonic Devices and Applications
Authors: Wu Yingchun , Tang Renjie , Luo Ye , Wu Jianghong , Jian Jialing , Bao Kangjian , Li Zongxi , Sun Chunlei , Lin Hongtao , Li Lan
Published: September 2024

This paper covers our recent progress in flexible integrated photonics devices based on cascaded microcavities for high spatial resolution, quasi-distributed strain and temperature sensing, and integration possibility of on-chip photodetection and spectroscopy for enhanced functionality.
Multi Kilowatt-Class Single-Mode Laser Transmission at 38 GHz Linewidth Through a 100 m Antiresonant Hollow-Core Fiber
Authors: Cooper Matthew A. , Bate Timothy , Wahlen Joseph , Yerolatsitis Stephanos , Antonio-Lopez Jose E. , Schülzgen Axel , Correa Rodrigo Amezcua
Published: September 2024

We demonstrate the transmission of 1.8 kW 38 GHz linewidth laser at 1080 nm through a 100 m AR-HCF, maintaining 95% efficiency, near-diffraction-limited beam quality, and no measurable stimulated Brillouin scattering response. Our results also highlight a potential path for high-efficiency multi-kW CW Raman lasing.
Efficient Hardware Configuration Method for Photonic Neural Network with Genetic Algorithm
Authors: Zhao Zichao , Chen Bei , Ma Haoran , Fu Ziyi , Yu Zeyu , Wang Yuehai , Yang Jianyi
Published: September 2024

The component imprecisions set obstacles for the implementation of on-chip photonic neural networks (PNNs). In this work, an efficient configuration method based on the genetic algorithm (GA) is proposed and applied for PNNs. Great convergence abilities are experimentally presented through performing complex-valued PNNs with two photonic chips.
Training Photonic Neural Networks with Dual Backpropagation
Authors: Zheng Ziyang , Duan Zhengyang , Chen Hang , Yang Rui , Gao Sheng , Zhang Haiou , Xiong Hongkai , Lin Xing
Published: September 2024

We report dual backpropagation training for end-to-end optimizing photonic neural networks (PNNs). We demonstrate the effectiveness of the proposed method by using diffractive and interference-based PNNs on image classification tasks under significant systematic errors.
Mid-IR supercontinuum generation in a birefringent SiGe waveguide with selectable dispersion regime
Authors: Biegański Adam , Torre Alberto Della , Armand Rémi , Perestjuk Marko , Reboud Vincent , Hartmann Jean-Michel , Mitchell Arnan , Nguyen Thach , Cueff Sébastien , Monat Christelle , Grillet Christian
Published: September 2024

We showcase pulse spectral broadening by pumping a birefringent SiGe-on-Si waveguide at 3.9 μm wavelength. By changing the pump polarization, we alter the waveguide’s dispersion regime and therefore the properties of generated spectra.