bluuebunny/crossref_metadata_2025 huggingface dataset:
A-central model for the geometric calibration of hyper-hemispherical lenses
Authors: Simioni Emanuele , Pernechele Claudio , Erb Wolfgang , Marchini Andrea , Martini Paolo , Lessio Luigi , Penasa Luca , Beghini Monica
Published: May 2024

Hyper-hemispherical lenses are optical objective lenses with an ultra-wide field of view. Due to their extreme field of view, the geometric calibration introduces several setup difficulties. Various methods have been developed for simplifying the geometric calibration of a camera in the close-range field by defining intrinsic and extrinsic calibration parameters in a limited ambience of a clean room and taking advantage of simple calibration chessboards. A well-known example in this regard is Zhang’s approach for pinhole cameras. A similar approach was pursued by Scaramuzza to model more extensive cameras that include fisheye and panoramic lenses. However, despite this toolbox’s efficiency, it is ineffectual in the case of a hyper-hemispherical lens because of model limitations in the approximation of the corresponding projection system. In this study, we define and validate what we believe to be a novel a-central model extension (AME) for the description of hyper-hemispherical lenses that is able to overcome these limitations and to describe more accurately the physical behavior introduced by the design of these lenses. For this apparently new a-central model, we obtain significantly improved calibration results for one of the cameras designed in our laboratory and planned to become a planetary payload of an ESA mission.
Three-Dimensional-Printed hollow Fabry-Perot fiber sensor for ultra-high sensitivity ultrasound detection
Authors: Wang Anqi , Fan Xuhao , Xu Dongchen , Chen Geng , Dai Chenhao , Zhang Zhi , Xiong Wei , Sun Qizhen
Published: May 2024

We demonstrate a hollow Fabry-Perot (FP) fiber sensor fabricated by 3D-printing technology for highly sensitive ultrasound detection. The sensor has a sensitivity of 167 mV/kPa which is 38 times higher than a solid FP fiber sensor.
Employment of polarization diversity architecture to mitigate an impact of pump phase modulation in FOPA
Authors: Bastamova Mariia , Gordienko Vladimir , Doran Nick J. , Ellis Andrew D.
Published: May 2024

We demonstrate via simulations and experiments that a FOPA polarization-diverse architecture allows to mitigate an impact of pump phase modulation on amplified signals and thus reduce or almost eliminate the signal required-OSNR penalty.
Ten-Channel High Power DFB Laser Array with High Single Mode Stability and Low RIN
Authors: Zhang Yuanhao , Lu Qianru , Liu Can , Xiang Minwen , Li Guojiong , Xia Juan , Lu Qiaoyin , Guo Weihua
Published: May 2024

A high power 10-channel single-mode DFB laser array with 200-GHz-spacing is demonstrated. Output power over 85mW, SMSR over 55dB and RIN below -155dBc/Hz have been realized for all channels of the fabricated laser array.
Multi-Wavelength DFB Laser with High Mode Stability and Uniform Spacing via REC Technique
Authors: Sun Zhenxing , Zhao Jie , Zhang Yue , Yang Zijiang , Tang Kaifei , Xiao Rulei , Chen Xiangfei
Published: May 2024

The multi-wavelength DFB lasers with four and six wavelengths simultaneously emitted are experimentally demonstrated for the emerging optical I/O technology. The proposed structure shows high mode stability and high uniform wavelength spacing of 100 GHz.
A Robust Timing Recovery Algorithm for Faster-than-Nyquist Digital Multi-band System
Authors: Deng Hao , Guo Wanzhen , Cai Yi , Zhao Jian
Published: May 2024

We propose a novel timing-recovery algorithm (TRA) for faster-than-Nyquist digital-multi-band systems, and experimentally demonstrate that the proposed TRA works for different compression ratios and outperforms conventional TRAs in dispersion and DGD tolerance and convergence speed.
Clock Recovery of a 180 Gbaud Faster-than-Nyquist Signal Enabled by a Novel Adaptive Equalizer-Aided Algorithm
Authors: Nakamura Yo , Huang Guoxiu , Nakashima Hisao , Hoshida Takeshi
Published: May 2024

We proposed a novel adaptive equalizer-aided clock recovery algorithm for faster-than-Nyquist coherent optical systems and experimentally demonstrated good performance for Tomlinson-Harashima pre-coded 16QAM signal until 180Gbaud under the system with 10dB bandwidth of 65GHz.
Optically Networked Heterogeneous Data-centric Computing System with Silicon Photonics Transceivers
Authors: Kim Dae-Ub , Lee Jyung Chan , Yoo Sanghwa , Song Jongtae , Han Kyeong-Eun , Youn Jiwook , Kim Bup Joong , Park Chanho , Ki Lee Joon
Published: May 2024

An architecture is proposed for optically networked heterogeneous computing system supporting CXL standard. The proposed system is applied to AI applications and achieves a performance degradation of less than 2% compared with the server solution.
Modeling the Input Power Dependency of Transceiver BER-ONSR for QoT Estimation
Authors: Mano Toru , Huang Yue-Kai , Borraccini Giacomo , Ip Ezra , D’Amico Andrea , Wang Zehao , Nishizawa Hideki , Zussman Gil , Chen Tingjun , Wang Ting , Asahi Koji , Kilper Daniel , Curri Vittorio , Takasugi Koichi
Published: May 2024

We propose a method to estimate the input power dependency of the transceiver BER-OSNR characteristic. Experiments using commercial transceivers show that estimation error in Q-factor is less than 0.2 dB.
Topology-Driven Edge Predictions with Graph Machine Learning for Optical Network Growth
Authors: Ahuja Akanksha , Herzberg Sam Nallaperuma , Rafel Albert , Wright Paul , Lord Andrew , Savory Seb J.
Published: May 2024

Graph representation learning on real-world optical core networks outperforms edge prediction heuristics by 10 times, achieving up to 93.4% accuracy on BT(UK), COST(EU), and CORONET(USA) by learning from 10% training data.
Preamble Design for Joint Frame Synchronization, Frequency Offset Estimation and Channel Estimation in Burst Mode Coherent PONs
Authors: Sun Yongxin , Jiang Hexun , Yi Lilin , Hu Weisheng , Zhuge Qunbi
Published: May 2024

We propose a preamble jointly achieving frame synchronization, frequency offset and channel estimation for burst-mode detection in coherent PON. The DSP converges within a 272-symbol preamble in a 15 GBaud experiment.
Hybrid, Multi-Format, Flexible-Rate Coherent PON Supporting Ultimate-Simplified Coherent and Full-coherent Receivers with Compatible OLT in Downstream
Authors: Yan An , Li Guoqiang , Xing Sizhe , Hu Yongzhu , Shen Wangwei , Zhao Junhao , Li Ziwei , Shen Chao , Shi Jianyang , Chi Nan , Zhang Junwen
Published: May 2024

We propose and demonstrate a hybrid, multi-format and flexible-rate coherent PON system supporting ultimate-simplified coherent and full-coherent receivers based on the compatible OLT setup, achieving 50 to 300 Gbps access in FLCS-CPON based on 4/16/64-QAMs.
3D Self-Aligning, Polarization-Independent Fiber-to-Chip Couplers
Authors: Kudalippalliyalil Ramesh , Chakraborty Trisha , Murphy Thomas E. , Grutter Karen E.
Published: May 2024

We demonstrate low-loss (< 1 dB), broadband (BW∼100 nm near λ ∼ 1550 nm) and polarization-independent fiber-to-chip couplers using 3D nano-printed polymer structures on Si3N4-on-SiO2 platform.
Broadband and Low-Loss Metamaterial Silicon Nitride Edge Coupler
Authors: He An , Xiang Jinlong , Zhao Yaotian , Yin Yuchen , Zhang Yvjia , Guo Xuhan , Su Yikai
Published: May 2024

We report a SiN edge coupler based on metamaterial structure with simple fabrication process, the coupling loss with SMF is 1.60/2.21 dB at 1310/1550 nm. The loss is smaller than 1.86/2.80 dB in O/S+C+L band.
A Partially Etched Silicon Spot-Size-Converter for O Band High NA Fibers
Authors: Teng Min , Wu Hao , Wang Feng , Chen Jiangpeng , Cheng Ning , Zheng Xuezhe
Published: May 2024

An O band partially etched silicon edge coupler for 3.3 μm MFD fiber is proposed to enhance coupling efficiency and fabrication tolerance. It's experimentally demonstrated with < 1.25 dB/facet coupling loss and <0.1 dB PDL.
A High-Speed Compact Polarization Controller in Silicon Photonics
Authors: Villegas Juan E. , Tamalampudi Srinivasa R. , Rasras Mahmoud S.
Published: May 2024

An ultra-compact (17 μm) 1550 nm inverse-designed silicon polarization converter with an insertion loss < 0.5 dB and extinction ratio > 25 dB is demonstrated and used to build a polarization controller with 20Gbit/s modulation.
Correlation-Based OTDR for High-Resolution Monitoring in Passive Optical Networks
Authors: Zhong Zhiyi , Liu Wu , Luo Min , Li Min , Xiao Xi
Published: May 2024

Utilizing correlation detection and comical optical transceivers, we detected <-58 dBm reflection signals with <10 cm spatial resolution in typical PON scenarios. Optical power monitoring and fault diagnosis are accomplished through analyzing the correlation results.
Probabilistic Shaping for Direct-Detection Optical Systems
Authors: Kahn Joseph M. , Liang Ethan M.
Published: May 2024

We study probabilistic shaping for direct-detection systems that modulate the intensity or Stokes vector and are limited by thermal or amplifier noise, obtaining analytical formulas for the optimal (non-Gaussian) input distributions and corresponding shaping gains.
Investigation of Concatenated KP4 FEC with Single-Parity-Check Codes for Short-Reach IM/DD Systems
Authors: Wettlin Tom , Calabrò Stefano , Stojanović Nebojša , Lin Youxi , Rahman Talha
Published: May 2024

We investigate the concatenation of KP4 FEC with short single-parity-check codes. This represents an intermediate solution in terms of performance, complexity and latency between standalone KP4 FEC and concatenated schemes based on stronger soft-decision codes.
Solutions to Increase Energy Efficiency of Optical Networks
Authors: Sambo N. , Cugini F. , De Marinis L. , Castoldi P.
Published: May 2024

Power consumption of devices and network functionalities in optical infrastructures is reviewed. Then, possible short-, medium-, and long-term solutions to reduce and make energy consumption scalable are discussed.
Can photonics help in reducing the power consumption in Radio Access Networks?
Authors: Cavaliere Fabio , Bigongiari Alessandra , Tartaglia Antonio
Published: May 2024

we discuss the challenges of future radio access networks in meeting the growth of traffic without a parallel explosion of energy consumption. The opportunities offered by integrated photonics technologies are analyzed.
Lithographic Aperture VCSELs Enabling Beyond 100G Datacom Applications
Authors: Tirelli S. , Corti E. , Duda E. , Pissis A. , Hönl S. , Hoser M. , Paul M. , Zibik E.
Published: May 2024

This paper reports the first demonstration of lithographic aperture VCSELs with bandwidth above 29 GHz. Large-signal measurements and preliminary lifetime data are reported, putting forward lithographic aperture as an enabling technology for applications beyond 100G.
59-fJ/bit Si Photonic Crystal Slow-Light Modulator with FinFET-Compatible Driving Voltage
Authors: Kawahara Keisuke , Tsuchizawa Tai , Yamamoto Noritsugu , Maegami Yuriko , Yamada Koji , Baba Toshihiko
Published: May 2024

Si Mach-Zehnder modulator with slow-light enhancement of photonic crystal phase shifter consumes a low bit energy of 59 fJ/bit and transmits a 64-Gbaud NRZ signal with a FinFET-compatible driving voltage of 0.87 V.
112 Gbaud optical PAM8 modulation based on segmented thin film lithium niobate modulator
Authors: Liu Yang , Wang Qiansheng , Wang Changqing , Wu Dingyi , Zhou Peiqi , Liu Ye , Zhang Hongguang , Chen Daigao , Xiao Xi
Published: May 2024

We experimentally demonstrate an optical transmission of 112 Gbaud PAM8 based on a segmented thin film lithium niobate modulator in an IMDD link. The Vpp of two single-ended RF signals are 2.5V and 3.5 V.
An ultimate-high linear silicon modulator based on all-optical linearization method
Authors: Fan Jingyang , Zhang Qiang , Fang Shengyu , Jiang Xingyi , Zhang Shuyue , Yu Hui
Published: May 2024

We proposed an ultimate-high linear silicon-based modulator based on all-optical linearization method, which demonstrates an SFDR as high as 131/127 dBHz6/7 at 1/10 GHz.
300 GHz photonic-wireless transmission with aggregated 1.034 Tbit/s data rate over 100 m wireless distance
Authors: Zhang Hongqi , Yang Zuomin , Lyu Zhidong , Yang Hang , Zhang Lu , Ozolins Oskars , Pang Xiaodan , Zhang Xianmin , Yu Xianbin
Published: May 2024

We present a long-distance ultrafast THz photonic-wireless communication system by combining frequency-, polarization- and spatial- division multiplexing techniques. An aggregated net rate of 1.034 Tbit/s over record 100 m at 300 GHz is successfully demonstrated.
RETRACTED: Demonstration of Hitless OCS Provision for Multi-modal Traffic in a Centralized Scheduling Hybrid Optical/Electrical Datacenter Network
Authors: Feng Shi , Zhang Jiawei , Dai Jun , Liu Yashe , Wang Xiaorun , Ji Yuefeng
Published: May 2024

We demonstrate a hitless OCS provision in a centralized scheduling
hybrid optical/electrical datacenter network through a real-time
FPGA-based testbed. Experimental results show that it achieves a low
packet delay and flow completion time accelerations.
Performance of Radix Sort using All-to-all Optical Interconnection Network in an Eight-FPGA Cluster
Authors: Mizutani Kenji , Urino Yutaka , Shimizu Takanori , Yamaguchi Hiroshi , Nakamura Shigeru , Usuki Tatsuya , Ishii Kiyo , Matsumoto Ryosuke , Inoue Takashi , Namiki Shu , Koibuchi Michihiro
Published: May 2024

This paper presents a high-throughput dataflow processing using all-to-all communication with eight FPGAs. We demonstrated a parallel radix sorting throughput of 37.2 GB/s for 32-bit key range and 16-GiB data size.
Reach Extension of Net-200G/λ IM-DD PAM4 Links to Beyond-100km with Low-complexity Using OE-EQ
Authors: Zhu Paikun , Yoshida Yuki , Akahane Kouichi , Kitayama Ken-ichi
Published: May 2024

We report C-band net-202Gb/s/λ IM-DD PAM4 transmission over single-span up-to-100.9km SSMF using only a single-drive intensity modulator, one PD, one ADC, low-complexity DSP and practical FEC, based on a theory-backed optoelectronic equalization (OE-EQ) technique.
Distributed vibration sensing and simultaneous self-homodyne transmission of single-carrier net 5.36 Tb/s signal using 7-core fiber
Authors: Tang Jianwei , Li Xueyang , Cheng Chen , Fan Linsheng , Hao Yaguang , Yue Bing , Li Jiali , He Zhixue , Yang Yanfu , Hu Weisheng
Published: May 2024

We demonstrate self-homodyne coherent transmission of a space-division multiplexed dual-pol 120-Gbaud 16 QAM signal achieving a single-carrier net data rate of 5.36 Tb/s, and simultaneously distributed vibration sensing using a 41.4 km weakly-coupled 7-core fiber.
Comparison between Phase and Polarization Sensing using Coherent Transceivers over Deployed Metro Fibers
Authors: Andrenacci Lorenzo , Pilori Dario , Pellegrini Saverio , Minelli Leonardo , Bosco Gabriella , Crognale Claudio , Piciaccia Stefano , Gaudino Roberto
Published: May 2024

We experimentally compare SOP and phase extraction under identical system conditions over a deployed 32-km unamplified metro fiber link for vibrations sensing ap-plications using coherent receivers.
Repeaterless Brillouin OTDR Sensing over 250 km using Erbium doped Fiber Amplifier
Authors: Mathew Neethu Mariam , Vandborg Mads Holmark , Christensen Jesper Bjerge , Wang Zepeng , Grüner-Nielsen Lars , Rishøj Lars Søgaard , Marx Benjamin , Allousch M. Ali , Geisler Tommy , Lassen Mikael , Rottwitt Karsten
Published: May 2024

We demonstrate a Brillouin OTDR sensing range of 251 km using two sections of remotely pumped Erbium doped fiber amplifiers. The temperature shift is measured with an accuracy of 3.3
◦
C at 251 km.
Dust Insensitive, Low Loss, and Low Mating Force Multi-Fiber Expanded Beam Optical Ferrule and Connectors
Authors: Ma Changbao , Chaloupka Kevin , Hernandez Edward , Hagen Nathan , Hao Bing , Koch Barry , Lee Boon , Miller Joseph , Nelson James , Sewall Nelson , Shonkwiler Nathaniel , Sun Xiaoguang , Treadwell Dan , LeBlanc Paul , Baude Paul
Published: May 2024

A new, multi-fiber, expanded beam optical ferrule, with state-of-the-art IL<0.7 dB (typical 0.34 dB), RL>55 dB for single mode (1310 nm), and IL<0.3 dB (typical 0.14 dB), RL>40 dB for multimode (850 nm), is reported.
Silicon Carbide Soliton Microcomb Generation for Narrow-grid Optical Communications
Authors: Li Jingwei , Zhang Haipeng , Wang Ruixuan , Jia Zhensheng , Li Qing
Published: May 2024

We demonstrate efficient soliton microcomb generation in silicon carbide microresonators with a record-low on-chip pump power of 6.5 mW. The microcomb exhibits a near 100 GHz free spectral range, enabling its application in optical communications.
Past and Future Development of Radio-over-Fiber
Authors: Lim Christina , Nirmalathas Ampalavanapillai , Ranaweera Chathurika , Tao Yijie , Edirisinghe Sampath , Wosinska Lena , Song Tingting
Published: May 2024

This tutorial provides an overview of Radio-over-Fiber technology focussing on the development, evolution, and challenges on the physical layer implementation incorporating photonic transport of mm-wave to THz wireless signals.
VCSEL-Based Optical Wireless Transmission: New Research Prospects
Authors: Ciaramella Ernesto , Cossu Giulio , Gilli Lorenzo
Published: May 2024

The fundamental features of VCSELs make them very suitable for various types of optical wireless communications, especially over short links. We present a range of promising applications for these devices in new OWC areas.
Quantum Cryptography with Injection-Locked Dual-Wavelength Diode Laser
Authors: Lee Yung-Hsuan , Lai Szu-En , Lin Gong-Ru
Published: May 2024

Master-to-slave injection-locked dual-mode diode laser is proposed for providing the single-photon DPS-QKD transmission at a shifted key rate of 1 Gbit/s with >3000-sec decoding stability under an interferometric visibility of 99.2% and dual-wavelength usage security.
First Penalty-free Real-time Co-frequency Co-time Full-duplex Optical Fiber Transmission with 202.1Tb/s Net Capacity Enabled by Hollow-core 5-element NANF
Authors: Ge Dawei , Xiong Yifan , Wu Yan , Sun Yizhi , Luan Yancai , Wang Dong , Gao Shoufei , Zhang Dechao , Mei Liang , Wang Yingying , Ding Wei , Li Han , Chen Zhangyuan
Published: May 2024

By leveraging extremely-low distributed Rayleigh backscattering in AR-HCF, we report the first real-time 202.1-Tb/s co-frequency co-time full-duplex transmission over a 466-m 5-element NANF based on ultra-wide 12-THz C+L-band EDFAs, exhibiting identical performance to unidirectional transmission.
Fast, Reliable and Portable Low-loss Antiresonant Hollow-core Fiber Fusion Splicing
Authors: Kremp Tristan , Liang Yue , McCurdy Alan H. , Yoshinaga Shoichi , Mangan Brian. J.
Published: May 2024

Using a fully automated rotational alignment algorithm and a portable 3-electrode arc-discharging fusion splicer, we achieve median splice losses of 0.13 dB between antiresonant hollow-core fibers within 120 seconds with 100% success rate.
Bend Insensitive Hollow Core DNANF with SMF-Matching Mode Field Diameter and 125µm Outer Diameter for Low Loss Direct Interconnection in Short Reach Applications
Authors: Mahdiraji Ghafour Amouzad , Rzegocki Jaroslaw , Davidson Ian A. , Guerra Gianluca , Jasion Gregory T. , Mousavi Seyed Mohammad Abokhamis , Jung Yongmin , Taranta Austin , Bottrill Kyle , Petropoulos Periklis , Poletti Francesco
Published: May 2024

We present the first 125µm outer diameter hollow-core fibre with a 10.6µm mode-field diameter allowing direct low-loss splicing to G652 SMF. We demonstrate O-to-C-band transmission and bend-insensitive single-mode operation, attractive for low-latency sub-1km communications.
High-Performance Thin-Film Lithium Niobate Mach-Zehnder Modulator on 8-Inch Silicon Substrate
Authors: Zhou Jingjie , Cong Qingyu , Lv Liming , Yao Zhanshi , Zhu Shiyang , Wang Yuxi , Li Zhaoyi , Fan Zuowen , Zeng Xianfeng , Hu Ting , Jia Lianxi
Published: May 2024

We first report the thin-film lithium niobate (TFLN) electro-optic Mach-Zehnder modulator (MZM) on an 8-inch silicon substrate fabricated in the back-end-of-line (BEOL) of CMOS foundry. It operates at 1550 nm with electro-optical response of only 1.5 dB roll-off at 67 GHz.
Thin-Film Lithium Niobate Modulator for a Flat Frequency-Response over 110 GHz Bandwidth with Integrated Electro-Optic Frequency-Domain Equalizer
Authors: Yamaguchi Yuya , Dat Pham Tien , Yamamoto Naokatsu , Akahane Kouichi , Kanno Atsushi , Kawanishi Tetsuya
Published: May 2024

We demonstrated an optical modulator with an ultra-flat frequency-response over 110 GHz by using a thin-film lithium niobate platform and the integration of an electro-optic frequency-domain equalizer. The half-wave voltage was 2.4 V, and we measured an extinction ratio exceeding 40 dB.
Linear-Drive Amplifier-Less 112 Gbit/s PAM4 Operation of a Silicon-Organic Hybrid (SOH) Mach-Zehnder Modulator at 265 mVpp
Authors: Schwarzenberger A. , Singer S. , Eschenbaum C. , Martens M. , Mertens A. , Dagher G. , Valenziano L. , Sarwar S. , Kholeif H. , Kotz A. , Zwick T. , Bräse S. , Freude W. , Randel S. , Koos C.
Published: May 2024

We demonstrate an optically packaged silicon-organic hybrid (SOH) Mach-Zehnder modulator operating at PAM4 data rates of up to 112 Gbit/s. The device is directly driven by a CMOS SerDes chip without additional optical or RF amplifiers.
Artificial Intelligence (AI)-Powered Robot for Optical Network Operation Automation
Authors: Xu Xiaonan , Chen Haoshuo , Scheutzow Michael , Simsarian Jesse E. , Ryf Roland , Qua Gin , Hande Amey , Dinoff Rob , Szczerban Mijail , Mazur Mikael , Dallachiesa Lauren , Fontaine Nicolas K. , Sandoz Jim , Coss Mike , Neilson David T.
Published: May 2024

We demonstrate an artificial intelligence (AI)-powered robot f or optical network operation automation and showcase three demos: 1) robot-driven event classification, 2) modified LC duplex connector for robotic operation, and 3) AI inference acceleration using an FPGA.
Hybrid integrated multi-lane erbium-doped Si3N4 waveguide amplifiers
Authors: Qiu Zheru , Ji Xinru , Liu Yang , Hafermann Martin , Kim Taegon , Olson Joseph C. , Ning Wang Rui , Ronning Carsten , Kippenberg Tobias
Published: May 2024

We present the integration of four individual erbium-doped waveguide optical amplifiers on a Si3N4 photonic integrated circuit hybrid integrated with a four-lane semi-conductor pump laser diode chip. Each amplifier achieves 15 dB on-chip gain.
Co-packaged micro reference cavity with photonic integrated circuits
Authors: Cheng Haotian , Jin Naijun , Dai Zhaowei , Xiang Chao , Guo Joel , Zhou Yishu , Diddams Scott A. , Quinlan Franklyn , Bowers John , Miller Owen , Rakich Peter
Published: May 2024

A compact co-packaged micro Fabry-Perot reference cavity integrated with photonic circuits achieves a redirected signal, 14.2 dB back-reflection suppression, and 79.5% cavity mode matching efficiency.
Neural Network with Optical Frequency-Coded ReLU
Authors: Stephanie Margareta V. , Pham Lam , Schindler Alexander , Waltl Michael , Grasser Tibor , Schrenk Bernhard
Published: May 2024

We demonstrate a photonic rectified linear unit (ReLU) function accomplished through frequency-coded neural signals. We show operation of an optical neuron with weighted sum and ReLU activation to perform with a 1% penalty in accuracy.
Sub-pJ/MAC Silicon Photonic GeMM for Optical Neural Networks using a Time-Space Multiplexed Coherent Xbar
Authors: Kovaios S. , Roumpos I. , Tsakyridis A. , Giamougiannis G. , Moralis-Pegios M. , Berciano M. , Ferraro F. , Bode D. , Srinivasan A. , Pantouvaki M. , Pleros N.
Published: May 2024

We present a time-space multiplexed Silicon Photonic Neural Network that acts as a General Matrix Multiply (GeMM) engine, using a 2×2 photonic Xbar prototype for demonstrating experimental results at 20GBd and an accuracy of 93.3% at an energy efficiency of 0.2pJ/MAC.
Reconfigurable All-Optical Integrated Nonlinear Activator with Switchable Response Functions for Photonic Neural Networks
Authors: Chen Bei , Wang Jian , Zhao Zichao , Xiong Xiaowen , Yang Jianyi , Li Ming , Zhu Ninghua
Published: May 2024

We experimentally demonstrate a reconfigurable all-optical integrated nonlinear activator with switchable response functions, including Gaussian, Radial Basis, Soft-plus, leaky ReLU, Swish and clamped ReLU functions, especially all triggered by low-power inputs.
Device dependent distortion correction in time-stretch photonic analog to digital converters using deep neural networks
Authors: Singh Mandeep , Dutta Joydip , J Sreeraj S , Sankar Viswanathan , Srinivasan Balaji , Theagarajan Lakshmi Narasimhan , Venkitesh Deepa
Published: May 2024

We experimentally demonstrate a novel deep learning-aided time-stretch photonic front end architecture to overcome device-dependent distortions to improve the signal-to-noise and distortion ratio by more than 24 dB, and reduce the bandwidth requirements of the back-end electronic ADC by three times.
Probabilistically Shaped 64-QAM Transmission via Distortion-aware Phase Retrieval
Authors: Huang Hanzi , Chen Haoshuo , Song Peiji , Guo Cheng , Gao Qi , Huang Yetian , Fontaine Nicolas K. , Mazur Mikael , Dallachiesa Lauren , Ryf Roland , Li Zhengxuan , Song Yingxiong
Published: May 2024

We experimentally demonstrate 50-GBaud probabilistically shaped 64-QAM transmission with 5.6-bits/symbol entropy over 80-km SSMF using carrierless intensity-only detection via a distortion-aware phase retrieval receiver, resulting net capacity over 200 Gb/s.
Opportunities and Challenges of Optical Communications in Autonomous Driving Vehicles
Authors: Liu Gordon Ning
Published: May 2024

Autonomous driving vehicles require high bandwidth due to the increased sensors and improved architectures. Optical communications provide several advantages over copper cables in intra-vehicle networks, but face many challenges, especially because of the harsh environment.
Assessing the Impact of Patterning Effect on Quantum Key Distribution
Authors: Wang Tao , Wang Yixin , Zhu Yanwen , Liu Sheng , Zhang Jie
Published: May 2024

We assessed the impact of patterning effect on SKR in QKD while considering statistical fluctuations. Through numerical simulations, compared to WCS, HSPS demonstrated superior resistance to patterning effect and can transmit over longer distances.
First Demonstration of a Group-IV Emitter on Photonic BiCMOS Supplying a Quantum Communication Link
Authors: Honz Florian , Hentschel Michael , Jessenig Stefan , Kraft Jochen , Walther Philip , Schrenk Bernhard
Published: May 2024

We implement a silicon-on-insulator light emitter as optical supply for a QKD transmitter and transfer it to an electronic BiCMOS wafer. A secure key is established over short reach in co-existence with shortwave data transmission.
Integrated Photonic Processors for Optical Free-Space Links
Authors: SeyedinNavadeh SeyedMohammad , Rojas Andres Ivan Martinez , di Tria Alessandro , Sacchi Emanuele , Zanetto Francesco , Ferrari Giorgio , Sampietro Marco , Miller David A.B. , Melloni Andrea , Morichetti Francesco
Published: May 2024

Programmable photonic integrated processors offer a large potential for the generation, manipulation, and detection of free-space optical beams (FSO). Applications are shown on the automated setting of optimal orthogonal MIMO channels and transmission through time varying FSO links.
Fabrication-Tolerant High-Speed 5-bit Silicon Optical True Time Delay Line In the O-band
Authors: Ni Ziheng , Wang Yixuan , Lu Liangjun , Liu Yuanbin , Chen Jianping , Zhou Linjie
Published: May 2024

We demonstrated a high-speed 5-bit silicon optical true time delay line based on fabrication-tolerant electro-optic push-pull optical switches, which shows a lower phase deviation and a lower insertion loss compared with the conventional design.
Enhancing Generalization in Neural Channel Model for Optical Fiber WDM Transmission through Learned Encoding of System Parameters
Authors: Zeng Chuyan , Niu Zekun , Yang Hang , Shi Minghui , Hu Weisheng , Yi Lilin
Published: May 2024

We propose a learned encoding method to enhance neural channel model generalization by integrating system parameters as side information. This approach achieves large-scale generalization, encompassing optical fiber transmission launch power and distance.
Pruning Attention in Transformers for Nonlinear Channel Compensation in Optical Systems
Authors: Hamgini Behnam Behinaein , Najafi Hossein , Bakhshali Ali , Zhang Zhuhong
Published: May 2024

We study pruning attention in Transformers for optical nonlinear channel compensation. We show the impact of statistical pruning on the performance and complexity of nonlinear equalization and compare it with a physics-informed pruning scheme.
Improved Physics-based Raman Amplifier Model in C+L Networks through Input Parameter Refinement
Authors: Zhang Yihao , Liu Xiaomin , Qiu Qizhi , Liu Yichen , Yi Lilin , Hu Weisheng , Zhuge Qunbi
Published: May 2024

We propose an input parameter refinement scheme for the physics-based Raman amplifier model. Experiments over C+L band are conducted. Results show the scheme can lower the physical model’s maximum estimation error by ~2.13 dB.
A Scalable, High-Speed Optical Rotor Switch
Authors: Mellette William M. , Agurok Ilya , Forencich Alex , Chang Spencer , Papen George , Ford Joseph E.
Published: May 2024

Rotary optical switching enables low-loss microsecond-scale reconfiguration between pre-programmed interconnects with thousands of ports, supporting high-bandwidth and low-latency Rotornet datacenter architectures. We describe a 7 µs 128 × 128 port rotor switch with 4 dB fiber-to-fiber insertion loss and a 1-dB spectral bandwidth of 120 nm.
C Band Single Wavelength 1.68Tb/s Optical Interconnect over 12.18-km 7-core Multicore Fiber
Authors: Wang Qibing , Li Chao , Zhao Yuanyuan , Liu Zichen , Chen Hui , Jin Siyue , Xiao Xi , Wang Lei , He Zhixue , Yu Shaohua
Published: May 2024

We demonstrate a single-wavelength 112GBaud PAM4 signal transmission over 12.18-km 7-core MCF at C band using FFE, under 7% HD-FEC threshold. Furthermore, a maximum data rate of 1.68-Tb/s is achieved with PAM8 and simplified VNLE.
High-rate quantum access network using coherent states
Authors: Pan Yan , Bian Yiming , Ma Li , Wang Heng , Dou Jiayi , Shao Yun , Pi Yaodi , Ye Ting , Yang Jie , Li Yang , Huang Wei , Yu Song , Zhang Yichen , Xu Bingjie
Published: May 2024

A quantum access network with Mbps level key rate and simple structure compatible with classical network facilities is reported, where the average secret key rate per user can reach 4.24 Mbps at 30 km.
Broadband mid-infrared continuous-wave wavelength conversion in a germanium-on-silicon waveguide
Authors: Yan Zhiwei , Yi Qiyuan , Li Qiyuan , Cheng Guanglian , Sun Yuhan , Xia Lipeng , Liu Yuheng , Xiong Xinzhe , Shen Zengfan , Xu Fanglu , He Meng , Zou Yi , Shen Li
Published: May 2024

We experimentally demonstrate broadband mid-infrared wavelength conversion using a germanium-on-silicon waveguide with conversion efficiency up to -28.72 dB under a continuous-wave pump at 3.56 μm. The measured conversion bandwidth is about 390 nm.
An Integrated Gallium Phosphide Travelling-Wave Optical Parametric Amplifier
Authors: Kuznetsov Nikolai , Nardi Alberto , Davydova Alisa , Churaev Mikhail , Riemensberger Johann , Seidler Paul , Kippenberg Tobias J.
Published: May 2024

We demonstrate optical continuous-travelling-wave parametric amplification in a 5.55-cm-long integrated gallium phosphide waveguide, achieving up to 35 dB of gain and significantly surpassing the bandwidth of erbium-doped fiber amplifiers.
Efficient Two Photon Absorption for 400-nm Remote Optical Control at 2-μm Waveband in a Low-loss Multimode Silicon Waveguide
Authors: Wang Zhaonian , Du Jiangbing , Xu Ke , He Zuyuan
Published: May 2024

Efficient TPA for 400-nm range remote control at 2-μm waveband is experimentally realized with 8.9-dB ER by C-band pump using a low-loss multimode silicon waveguide, indicating fully utilized advantages at both C and 2-μm wavebands.
Over 100nm Wavelength Conversion Bandwidth with High Efficiency on AlGaAsOI Nonlinear Waveguides
Authors: Lei Zhengshun , Xie Weiqiang , Wei Wenqi , Wang Zihao , Wang Ting , Zhang Jianjun , Su Yikai
Published: May 2024

A nonlinear wavelength conversion with over 100nm bandwidth and >–10dB conversion efficiency on AlGaAsOI waveguides is demonstrated, using a low-power and single continuous-wave pump. Theoretical simulations are in excellent agreement with the experimental results.
Hybrid TFDM Coherent PON Featuring Adaptable Capacity and Out-of-band Communication Channels
Authors: Zhang Haipeng , Jia Zhensheng , Campos Luis Alberto , Choutagunta Karthik , Knittle Curtis
Published: May 2024

We present a novel TFDM coherent PON architecture supporting adaptable modulation across subcarriers. Experimental validation highlights its flexibility in various link distance/splitting configurations, featuring out-of-band communication subcarriers. Downstream broadcasting and upstream burst transmission were demonstrated. ©2024 The Author(s)
Analysis of SBS-Induced Performance Penalties and Their Mitigation in 50G TDM-PON Downstream
Authors: Füllner Christoph , Wang Ning , M.A Fathima Shabana , van Veen Dora , Bonk René
Published: May 2024

We study SBS for 50G TDM-PON downstream showing that considerable performance penalties can occur depending on the specific operating conditions of the transmitter. Frequency dithering can mitigate SBS without impact on other performance metrics.
PPLN-Based Polarization-Diverse Phase-Sensitive Amplification of 96-Gbaud PDM-PCS-64QAM Signal with Carrier-Phase-Locked Phase-Conjugated Twin Waves
Authors: Shimizu Shimpei , Kazama Takushi , Umeki Takeshi , Enbutsu Koji , Nakamura Masanori , Abe Masashi , Kobayashi Takayuki , Miyamoto Yutaka
Published: May 2024

We demonstrated non-degenerate phase-sensitive amplification (PSA) of a 96-Gbaud PDM-PCS-64QAM signal. Phase-conjugated twin waves (PCTWs) with a polarization-independent carrier phase provided low-noise PSA of a 2.5-dB black-box noise figure without polarization tracking of the PCTWs.
Cryptographic Key Generation Using Conventional Single-Mode Fiber and an Optical Time Domain Reflectometer
Authors: Sagae Yuto , Nakamura Atsushi , Mori Takayoshi , Koshikiya Yusuke , Nakajima Kazuhide
Published: May 2024

Generation of cryptographic key is demonstrated by conventional equipment for an optical network. Random bit sequences obtained from an optical time domain reflectometry of a single-mode fiber satisfies a quality of randomness as cryptographic keys.
A Joint Mode Permutation Architecture for 10-mode-multiplexed Long-haul Transmissions
Authors: Liu Xiaochuan , Wang Yanze , Huang Qiushi , Zhang Dechao , Wang Xutao , Guo Qiang , Yang Zhiqun , Liu Yaping , Zhou Rui , Sun Wei , Zuo Mingqing , Yan Min , Liu Zhenhua , Zhang Xianyu , Huang Zhanhua , Wang Dong , Xiao Xinhua , Zhang Lin
Published: May 2024

For the first time, we propose and experimentally demonstrate a joint mode permutation architecture for 10-mode transmission. Compared with cyclic mode-group permutation, the required equalizer window is further reduced by 30.7%, while the transmission reach is extended to 2000 km.
10-mode PM-QPSK Transmission over 2320 km Enabled by Optimized Mode Permutation Strategies
Authors: Wang Yanze , Liu Xiaochuan , Huang Qiushi , Zhang Dechao , Wang Xutao , Guo Qiang , Gao Tianyu , Yang Zhiqun , Liu Yaping , Hu Haofeng , Zhou Rui , Sun Wei , Zuo Mingqing , Yan Min , Liu Zhenhua , Zhang Xianyu , Huang Zhanhua , Wang Dong , Xiao Xinhua , Zhang Lin
Published: May 2024

For the first time, we demonstrate a 15-Gbaud PM-QPSK 10-mode transmission, extending the record reach by 1000 km, to 2320 km now. We develop the rules for identifying superior mode-permutation strategies (MPSs) among a huge number of MPSs. 24 MPSs are verified in experiments to greatly mitigate the differential mode delay and mode-dependent loss.
Control of Packet over Multi-Granular Optical Networks combining Wavelength, Waveband and Spatial Switching For 6G transport
Authors: Muñoz Raul , Lohani V. , Casellas R. , Martínez R. , Vilalta R.
Published: May 2024

This paper presents an end-to-end transport SDN control system for packet (IP) and multi-granular (WDM/WBDM/SDM) optical networks for 6G transport. The dynamic routing and resource assignment combining wavelength, waveband, and spatial resources is also addressed.
Comparative Assessment of S+C+L-band and E+C+L-band Systems with Hybrid Amplification
Authors: Souza André , Costa Nelson , Pedro João , Pires João
Published: May 2024

We compare the potential of four multi-band transmission systems leveraging optimized Raman amplification. Simulation results highlight that complementing a SuperC+L-band system with the S-band outperforms using the E-band or interleaving data channels and Raman pumps.
Advanced MLSE with Simple Soft Output Achieving High NGMI for SD-FEC in IM-DD Transmission with Severe Bandwidth Limitation
Authors: Yamamoto Shuto , Taniguchi Hiroki , Nakamura Masanori , Masuda Akira , Yamazaki Etsushi
Published: May 2024

We propose a simple LLR-calculation method which modifies the LLR distribution using hard-decision information for IM-DD systems with MLSE and SD-FEC. The proposed method achieves high NGMI in 128-Gbaud PAM4 transmission with 40-GHz bandwidth limitation.
An Optimization Method for Probabilistic Constellation Shaping in Peak-Power Constraint Systems in the Presence of Peak Enhancement Effects
Authors: Ozaydin Basak , Chen Xi , Che Di
Published: May 2024

We propose a generic method to optimize the probabilistic distributions for a peak-power constraint system with arbitrary peak enhancement effects. The technique is useful for developing flexible-rate optical transceivers in links without optical amplifiers.
Role of Frequency-Resolved SNR in Entropy-Loading DMT Systems: Rate Comparison and Simplified Options
Authors: Song Peiji , Che Di
Published: May 2024

We verify that frequency-resolved SNR is crucial to approach the capacity of a discrete-multitone system with entropy loading (EL), and propose several methods to reduce the complexity of EL while keeping the SNR information to minimize the rate penalty.
XLRON: Accelerated Reinforcement Learning Environments for Optical Networks
Authors: Doherty Michael , Beghelli Alejandra
Published: May 2024

We present XLRON: an open source project enabling, for the first time, GPU-accelerated reinforcement learning on optical network problems. We demonstrate 100-1000x speed-up in training time over similar tools, thereby opening new research possi-bilities.
Experimental Disaggregation of Propagation Effects in Optical Links
Authors: Girard-Jollet J. , Antona J.-C. , Meseguer A. Carbó , Boitier F. , Ramantanis P. , Rekaya G.
Published: May 2024

We introduce a protocol to evaluate experimentally the fiber nonlinear coefficients for intra- and inter-channel effects. We characterized a three-span transmission using highly dispersed QPSK signals, observing good agreement with the eGN model.
Sub-terahertz interconnection based on Ge-Si photodetector
Authors: Chen Wei , Wang Yilun , Chen Liao , Jiang Zhibin , Hou Zhibo , Yu Yu , Zhang Xinliang
Published: May 2024

The sub-THz inter-chip interconnections are first demonstrated with terahertz photomixers based on standard-process fabricated germanium-silicon photodetectors and bow-tie antennas, featuring a frequency range over 200 GHz.
Performance Evaluation and Optimization of LDPC FEC for 100 Gbps Coherent Passive Optical Networks
Authors: Zhang Qun , Zhang Haipeng , Jia Zhensheng
Published: May 2024

Using both simulation and experimental data, we investigate performance of the LDPC FEC code used in current 25G/50G PONs through clipping optimization for coherent PONs, demonstrating its feasibility for future PON’s applications.
Reduced-Complexity Frequency Interleaved DAC for High-Speed Optical Communications
Authors: Bonetti Juan , Hueda Mario
Published: May 2024

We propose a new architecture of frequency-interleaved DACs for the all-electronic generation of high-bandwidth signals. We demonstrate significant reduction in both DSP complexity and PAPR, along with a simplified analog circuit design.
Integrated Coherent Optical Fiber Communication System with Discrete-Time Analog Transmission
Authors: Huang Hongyu , Yu Zhenming , Cheng Liming , Zhang Wei , Mu Yueqiu , Xu Kun
Published: May 2024

We propose and experimentally demonstrate an integrated coherent optical fiber communication system based on discrete-time analog transmission (DTAT-IOFC). The experimental results indicate that DTAT-IOFC exhibits better performance and achieves 6 dB optical signal-to-noise ratio gain.
A Compact Silicon-based Photonic Phase-tunable Microwave Frequency Downconverter
Authors: Jiang Xingyi , Zhang Qiang , Fang Shengyu , Zhang Shuyue , Yu Hui
Published: May 2024

We experimentally demonstrate a compact silicon-based photonic frequency downconverter with tunable phase shift. It can be operated at 20/40 GHz while supporting a 137° phase shift of 0.04 GHz IF signal.
Estimation of Energy Storage Status in Power Supply System Using Power over Fiber for Outdoor Environment
Authors: Kawano Tomohiro , Koyama Ryo , Kuroda Akihiro , Uematsu Takui , Fukai Chisato , Watanabe Hiroshi , Ogushi Ikutaro
Published: May 2024

We demonstrate that our model for estimating power charging regimes of the power supply system combining power over fiber and an energy storage is very accurate as it accounts for the temperature dependence.
PtMP Multi-IF-Over-Fiber Systems Using Remotely Shared Local Oscillators for Plural Antenna Sites
Authors: Tanaka Kazuki , Nimura Shinji , Inohara Ryo
Published: May 2024

A multi-channel intermediate frequency-over-Fiber (IFoF) system with remotely shared local oscillators (LO) is proposed. IF-to-RF conversion by a shared LO is experimentally verified meeting the 3GPP error vector magnitude (EVM) criterion for 64-QAM OFDM signal.
Hierarchical Energy-aware Monitoring Framework for Sustainability of Packet-Optical Networks
Authors: Akbar W. , Vilchez J. , Muñoz R. , Vilalta R. , Gifre Ll.
Published: May 2024

We present a hierarchical energy monitoring framework to systematically analyze energy consumption in computing, IP, and Optical networks. We demonstrated the framework on the laboratory testbed to validate the practicality and scalability.
100 Gbps PAM4 Transmissions over 50 km with 40 dB Power Budget for PON using a High-Gain Quantum Dot SOA
Authors: Venkatasubramani Lakshmi Narayanan , Reza Ahmed Galib , Mikhrin Vladimir S. , Gubenko Alexey , Kovsh Alexey R. , Barry Liam
Published: May 2024

We experimentally demonstrate a 106 Gbps PON downstream signal transmission using a high-gain InAs/InGaAs quantum dot-based SOA as a preamplifier. We achieved a record-high power budget of 40 dB considering an HD-LDPC BER limit of 1 × 10
−
2.
Field Trial of Quantum-Secured IPsec Tunnels with Chip-based QKD
Authors: Sibson Philip , Kennard Jake , Crabtree Tom , Wright Paul , White Catherine , Salas Emilio Hugues , Lord Andrew , Grammel Gert , Mead Bill , Radev Radko , Aelmans Melchior , Jacques Steven
Published: May 2024

We report a field trial of chip-based QKD over 28.5km of deployed G.652 fibre, integrated using RFC 8784 with Juniper routers, with concurrent IPsec tunnels consuming independent keys. This illustrates practical quantum-resilient transport layer communication.
100m Free-Space Over 10Gbps Visible Light Laser Communication Using Gallium-nitride Blue LD and Huffman-coded Dyadic Probabilistic Shaping
Authors: Xu Zengyi , Zhou Yuning , Lu Zhilan , Cai Jifan , Chi Nan
Published: May 2024

In this experiment, we achieved over 10Gbps transmission rate in a 100m free-space visible light laser communication system. Huffman-coded QAM provides probabilistic shaping effects and improves the system's working range and robustness against turbulence.
Reliability Enhancement in FSO Communications Using FMF Assisted by Subcarrier Multiplexing
Authors: Freitas Manuel M. , Fernandes Marco A. , Correia Vitor D. , Monteiro Paulo P. , Guiomar Fernando P. , Fernandes Gil M.
Published: May 2024

We exploit the frequency diversity offered by digital subcarrier-multiplexing to overcome the coherent combining challenge associated with the use of FMF in FSO systems. Experimental validation at 200 Gbps in an atmospheric chamber reveals reliability gains of >20% compared with an equivalent single-mode coupling system.
Eye-Safe Terabit-Class WDM Optical Wireless: How Many Channels are Enough?
Authors: Fernandes Marco A. , Fernandes Gil M. , Brandão Bruno T. , Freitas Manuel M. , Kaai Nourdin , Tomeeva Alina , van Der Wielen Bas , Reid John , Raiteri Daniele , Monteiro Paulo P. , Guiomar Fernando P.
Published: May 2024

On the path towards Terabit-class optical wireless, the use of WDM technology poses many practical questions. Supported by a 1.8 km field-trial, and multiplexing up to 16×200G channels, we expose the tradeoffs between capacity and reliability depending on the channel count, optical pre-amplification architecture and coding requirements.
Plasmonic On-Chip Antenna Enabling Fully Passive sub-THz-to-Optical Receiver for Future RoF Systems
Authors: Ibili Hande , Blatter Tobias , Kulmer Laurenz , Baumann Michael , Turki Salim , Horst Yannik , Koepfli Stefan M. , Vukovic Boris , Smajic Jasmin , Leuthold Juerg
Published: May 2024

We demonstrate a fully-passive on-chip antenna integrated plasmonic modulator receiver with a built-in field enhancement of 10’000 around 235GHz making RF electronics redundant. Transmission of up to 80Gbit/s in a wireless sub-THz link is shown.
Space Qualifying Silicon Photonic Modulators and Circuits
Authors: Mao Dun , Chang Lorry , Dong Po , Gu Tingyi
Published: May 2024

Here we performed the first space experiments of photonic integrated circuits, revealing the critical roles of energetic charged particles. The year-long cosmic radiation does not change carrier mobility but reduces free carrier lifetime, resulting in unchanged electro-optic modulation efficiency and well-expanded optoelectronic bandwidth.
45.7 Tb/s over 12 053 km Transmission with an All-Multi-Core Recirculating-Loop 4-Core-Fiber System
Authors: Di Sciullo Giammarco , Puttnam Benjamin J. , van den Hout Menno , Luís Ruben S. , Shaji Divya A. , Rademacher Georg , Okonkwo Chigo , Mecozzi Antonio , Antonelli Cristian , Furukawa Hideaki
Published: May 2024

We demonstrate 45.7 Tb/s transmission of 4×175×24.5 GBd DP-QPSK signals over 12 053 km of four-core fiber u sing m ulti-core C -band E DFAs and Raman amplification. This is the first all-multi-core component recirculating-loop-based long-haul transmission system.
151.5-GHz Sub-THz Signal Reception and Downconversion Using All-Optical Technology
Authors: Dat Pham Tien , Yamaguchi Yuya , Takano Shingo , Hirata Shotaro , Ichikawa Junichiro , Shimizu Ryo , Inagaki Keizo , Morohashi Isao , Yoshida Yuki , Kanno Atsushi , Yamamoto Naokatsu , Akahane Kouichi
Published: May 2024

A direct reception of a sub-THz signal and its conversion to the microwave band is demonstrated using an all-optical receiver and photonic downconversion technology. An 80-Gb/s OFDM signal was transmitted over a converged fiber–sub-THz–fiber system at 151.5-GHz.
40-GHz Bandwidth Envelope Detector Used in 0.3-THz IM/DD System for 4096-QAM DSM Signal Transmission
Authors: Long Jianyu , Tan Jingwen , Yu Jianjun , Liu Jiaxuan , Yang Xiongwei , Wei Yi , Wang Kaihui , Zhou Wen , Zhao Xianmin , Ding Junjie , Zhang Jiao , Zhu Min , Yu Jianguo , Zhao Feng
Published: May 2024

We experimentally demonstrate a photonics-aided THz IM/DD transmission system using a large-bandwidth envelope detector and delta-sigma modulation. The proposed system can support 4096-QAM DSM modulation and simple and low-cost receiver architecture.
Optical Frequency Division on SiN-based Platform for Low-noise mmWave Generation
Authors: Sun Shuman , Wang Beichen , Liu Kaikai , Wang Jiawei , Liu Ruxuan , Jahanbozorgi Mandana , Yang Zijiao , Morton Paul , Nelson Karl , Blumenthal Daniel , Yi Xu
Published: May 2024

We demonstrate integrated optical frequency division using SiN-based reference cavity and microcomb, achieving a 36 dB phase noise reduction. With 100 GHz carrier frequency, phase noise reaches -115 dBc/Hz at 10 kHz offset.