bluuebunny/crossref_metadata_2025 huggingface dataset:
Non-Destructive Characterization of Hollow Core Fiber
Authors: Budd Leonard , Taranta Austin , Fokoua Eric Numkam , Poletti Francesco
Published: May 2024

We summarize our recent work developing a technique for accurate and non-destructive measurement of the microstructure geometry of nested and double nested antiresonant fibers. We present results showing microstructure variation along a 2.2 km fiber.
110 GHz Plasmonic Lithium Niobate Phase Modulator
Authors: Wang Yilun , Zhao Jihao , Gao Xiaoyan , Wang Qiansheng , Xiao Xi , Cheng Jian , Gao Dingshan , Gu Wentao , Dong Wenchan , Yan Qizhi , Chen Liao , Yu Yu , Zhang Chi , Zhang Xinliang
Published: May 2024

An ultra-compact lithium niobate phase modulator based on the plasmonic slot waveguide is demonstrated with a length of ~16 μm, featuring a bandwidth exceeding 110 GHz and a high-rate operation beyond 90 Gbaud.
Demonstration of Cooperative Transport Interface using open-source 5G OpenRAN and virtualised PON network
Authors: Slyne Frank , O’Sullivan Kevin , Dzaferagic Merim , Richardson Bruce , Wrzeszcz Marcin , Ryan Brendan , Power Niall , Giller Robin , Ruffini Marco
Published: May 2024

We demonstrate a real-time, converged 5G-PON through the Cooperative Transport Interface, synchronising 5G and PON-DBA upstream schedulers. This innovative approach, implemented using 5G and PON open network implementations, significantly enhances network resource allocation, reducing latency.
Demonstration of a Compositional Learning Framework for Open and Disaggregated Optical Network Control
Authors: Tran Huy Quang , Errea Javier , Thieu Huu Trung , Van Quan Pham , Choi Nakjung , Verchere Dominique , Ksentini Adlen , Zeghlache Djamal
Published: May 2024

We introduce an automated Compositional Learning Framework, which can dynamically combine ML models to create a composite ML service. It leverages the MLOps principle to streamline drift-aware ML workflows. We showcase its applicability in the dy-namic Routing Modulation and Spectrum Allocation scenario with an open disaggregated control platform.
Quantum-Assisted Digital Signature in an SDN-controlled Optical Network
Authors: Giorgetti A. , Andriolli N. , Storelli E. , Ferrari M. , Paduanelli G. , Cacicia A. , Paganelli R. , Tarable A. , Paolini E. , Sajeva G. , Brunero M. , Gagliano A. , Martelli P. , Noviello P. , Schmid G. , Gatto A.
Published: May 2024

This demo presents a quantum-assisted digital signature protocol implemen-tation exploiting Quantum Key Distribution devices and Software Defined Networking (SDN) control. The demonstration shows an innovative practical employment of quantum technology in real-world scenarios.
TAPI-based Telemetry Streaming in Multi-domain Optical Transport Network
Authors: Karunakaran Vignesh , Natalino Carlos , Shariati Behnam , Lechowicz Piotr , Fischer Johannes Karl , Autenrieth Achim , Monti Paolo , Bauschert Thomas
Published: May 2024

We demonstrate a TAPI-based telemetry streaming framework for automated service provisioning and monitoring in multi-domain optical networks. The demo show-cases ML-based anomaly detection and network management across domains adhering to recommended YANG and protocol standards.
AIM Photonics Design Enablement: A Design-Assembly-Test Platform Advancing the Silicon-Photonics Ecosystem
Authors: Dikshit Amit , Wallner Jin , Hossain M. Jobayer , Uddin M. Rakib , Mann Javery , Aiello Anthony , Carpenter Lewis G. , Timalsina Yukta , McDonough Colin , Fahrenkopf Nick , Leake Gerald , Baiocco Christopher , Striemer Christopher , Halepis Maria , Coleman Daniel , Begovic Amir , Yang Hao , Zylstra Michael , Jahn Jerome , Goldstein Jordan , Poulton Christopher V. , Stievater Todd , Tyndall Nathan , Fanto Michael , Harame David
Published: May 2024

AIM Photonics design enablement platforms supporting photonic integrated circuit design, interposer-based assembly, and design-for-test for a 300 mm CMOS-compatible silicon-photonics foundry are presented.
Low-loss, multi-reticle stitched SiN waveguides for 300mm wafer-level optical interconnects
Authors: Xu Pengfei , Marchese Chiara , Lepage Guy , Golshani Negin , Van Eenaeme Ruben , Mingardi Andrea , Van Ongeval Joost , Magdziak Rafal , Halipre Luc , Trivkovic Darko , Verheyen Peter , Chakrabarti Maumita , Velenis Dimitrios , Miller Andy , Ferraro Filippo , Ban Yoojin , Van Campenhout Joris
Published: May 2024

We present 56-cm long LPCVD SiN waveguides traversing a full 300mm wafer, targeting future optically interconnected wafer-scale multi-chip compute systems. High-precision reticle stitching (loss below 0.01dB/interface) enables intra-wafer waveguide loss of just 0.15dB/cm in the O-band.
Experimental Demonstration of Imperfection-Agnostic Local Learning Rules on Photonic Neural Networks with Mach-Zehnder Interferometric Meshes
Authors: El Srouji Luis , On Mehmet Berkay , Lee Yun-Jhu , Abdelghany Mahmoud , Ben Yoo S. J.
Published: May 2024

Mach-Zehnder Interferometric meshes are attractive for low-loss photonic matrix multiplication but are challenging to program. Using least-squares optimization of directional derivatives, we experimentally demonstrate that desired matrix updates can be implemented agnostic to hardware imperfections.
A physical-layer Rogue ONU identification method based on hardware fingerprint technology
Authors: Liu Kaiyu , Huang Danming , Tang Chengzhe , Deng Lei , Yang Qi , Dai Xiaoxiao , Liu Deming , Cheng Mengfan
Published: May 2024

We propose a method for identifying rogue ONUs based on hardware fingerprint technology. By directly detecting waveform fingerprints, the experimental results show that the average identification accuracy within 16 ONUs can reach 96.74%.
Photonic Layer Encryption in High Speed Optical Communications
Authors: Sadot Dan , Wohlgemuth Eyal , Attia Ido , Balasiano Ohad , Jonas Isaak , Keller Elimelech , Shalom Hamutal
Published: May 2024

Combining multi-THz optical spectrum spreading, photonic phase encoding, and negative optical signal-to-noise ratio (OSNR) transmission, forms photonic shield that prevents data recording for offline deciphering. This supports post-quantum security by eliminating raw data availability for quantum computers processing.
Double-stage Carrier Frequency Offset Estimation Using the Eigenvalue and Scattering Coefficient b in the Nonlinear Fourier Transform
Authors: Chino Taisuke , Motomura Takumi , Maruta Akihiro , Mishina Ken
Published: May 2024

We propose a novel method to estimate the carrier frequency offset (CFO) using the eigenvalue and scattering coefficient b in the NFT. Our experiments demonstrate fine CFO estimation below 10 kHz for the proposed method.
Savitzky-Golay-filter-based Phase Recovery for CV-QKD
Authors: Llanos E. , Adillon P. , Sarmiento S. , Tabares J. , Etcheverry S.
Published: May 2024

A Savitzky-Golay filter (SGF) is employed to reduce the excess noise introduced by a pilot-tone-based phase recovery in CV-QKD. Results show an improvement of 29.2% in the secret key rate at 10.9 km when the SGF is used.
Power Monitoring and Thermal Crosstalk Compensation for ORR-based Optical Beamformer
Authors: Shi Bin , Stabile Ripalta , Tangdiongga Eduward
Published: May 2024

We demonstrate thermal-crosstalk-compensated ORR-based beamformer on InP photonic integrated circuit, through an automatic voltage control method that uses on-chip power monitoring for continuous delay tuning, with <1s reconfiguration time.
W-band Wireless Transmission based on 98 GHz Packaged Silicon Photonics Optical Clock Generator
Authors: Malacarne Antonio , Montanaro Alberto , Ahmad Fawad , Pandey Gaurav , D’Errico Antonio , Romagnoli Marco , Bogoni Antonella , Porzi Claudio
Published: May 2024

A fully packaged CMOS-compatible photonic integrated frequency-tunable optical clock synthesizer is used for 93 GHz wireless transmission of complex modulation formats up to 4 Gb/s data rate, with noise performance suitable for upcoming 6G networks.
Beamforming demonstration of Hybrid Photonic Integrated Circuit based on a Blass Matrix for Radar receivers
Authors: Camponeschi Federico , Gemmato Valentina , Scotti Filippo , Rinaldi Luca , Mohammad Ahmad W. , Roeloffzen Chris G. , van Dijk Paul W. , Ghelfi Paolo
Published: May 2024

This paper reports the first-ever beamforming demonstration of a hybrid photonic integrated circuit operating as RF down-converter based on an optical Blass-matrix architecture for a Scan-on-Receive synthetic aperture radar intended for Earth observation from space.
The Information Capacity of the Fiber-Optic Channel: Bounds and prospects
Authors: Shtaif Mark , Antonelli Cristian , Mecozzi Antonio , Chen Xi
Published: May 2024

We discuss the challenges in assessing the theoretical limits to the throughput of fiber-optic communications systems and argue that the uncertainty of available information capacity limits is within a range of 1.17 bit/s/Hz. We show that record experiments are within 20 to 30 percent from these limits in terrestrial single-mode fiber systems for metro to long-haul transmission. It appears that the continued scaling of optical communications will have to rely on parallelism and space-division multiplexed fiber transmission
Programmable integrated photonic circuit for matrix inversion
Authors: Cavicchioli G. , Miller D. A. B. , Engheta N. , Melloni A. , Morichetti F.
Published: May 2024

We propose and demonstrate the optical inversion of a programmable matrix by using a silicon photonic interferometer mesh in a feedback loop, without any optical-to-electronic conversions inside the inversion process.
Automated Tuning of Ring-Assisted MZI–Based Interleaver for DWDM Systems
Authors: Wang Songli , Wang Yuyang , Meng Xiang , Hosseini Kaveh , Hoang Tim Tri , Bergman Keren
Published: May 2024

We present an RAMZI auto-tuning structure for DWDM systems, rectifying phase errors and optimizing passband alignment. Experimental results validate improved performance and operational efficiency, facilitating scalable communication infrastructures in high-performance computing systems and data centers.
Self-locking of free-running DFB lasers to a single microring resonator for dense WDM
Authors: Sun Yonghang , Salamy James , Murray Caitlin E. , Little Brent E. , Chu Sai T. , Morandotti Roberto , Mitchell Arnan , Moss David J. , Corcoran Bill
Published: May 2024

We self-injection lock two DFB lasers to a microring resonator, to enhance frequency-spacing stability, and use these to carry channels with <1 GHz guard-band.
O-band QKD link over a multiple ONT loaded carrier-grade GPON for FTTH applications
Authors: Makris N. , Ntanos A. , Papageorgopoulos A. , Stathis A. , Konteli P. , Tsoni I. , Giannoulis G. , Setaki F. , Stathopoulos T. , Lyberopoulos G. , Avramopoulos H. , Kanellos G. T. , Syvridis D.
Published: May 2024

We have successfully integrated an O-band commercial Quantum-Key-Distribution (QKD) system over a lit GPON testbed that replicates a carrier-grade Fiber-to-the-Home (FTTH) optical access network with multiple ONTs to emulate real-life FTTH operational deployments.
Characterizing Fiber Nonlinearity with Deployed Equipment in Optical Line Systems
Authors: Pei Yinqing , MacKay Alex W. , Boroojerdi Mehrnoosh , Archambault Jean-Luc , Boertjes David W.
Published: May 2024

We introduce the first measurement procedure to characterize fiber nonlinear parameters of all fibers in an optical network using widely deployed network equipment which does not rely on modem measurements or external instrumentation.
GPT-Enabled Digital Twin Assistant for Multi-task Cooperative Management in Autonomous Optical Network
Authors: Zhang Yao , Zhang Min , Song Yuchen , Jiang Xiaotian , Wang Yidi , Shen Shikui , Wang Danshi
Published: May 2024

A GPT-enabled digital twin (DT) assistant is implemented with the capabilities of intention understanding, analysis, reasoning, and complex multi-task collaboration, which integrate DT technologies to enhance the automated operation, monitoring, control, and upgrade of optical networks.
5.27 Peta-bit/s Weakly-Coupled SDM-WDM Transmission over 55-km 10-Mode 7-Core Fiber for SDM-Priority Scheme
Authors: Qiao Gang , Yang Yu , Ji Honglin , Gao Yuyang , Zuo Mingqing , Long Chengbin , Zhang Jiarui , Yu Jinyi , Xu Zhaopeng , Wang Shangcheng , Liu Lulu , Wu Qi , Shen Lei , Luo Jie , He Zhixue , Li Hongbin , Hu Weisheng , Yu Shaohua , Li Juhao
Published: May 2024

We propose an SDM-priority SDM-WDM transmission scheme with simplified optical transceiver structure, for which a record throughput of 5.27 peta-bit/s transmission over 55-km weakly-coupled 10-mode 7-core fiber is experimentally demonstrated with up to 4×4 MIMO-DSP.
147.4 Tb/s DP-64QAM MDM-WDM Transmission over 500-km FMF utilizing MIMO Equalization Based on Multi-Label Neural Network
Authors: Sang Bohan , Wang Chen , Zhang Yao , Zhu Bowen , Long Jianyu , Zheng Tianqi , Wang Kaihui , Zhou Wen , Liu Bo , Shen Lei , Ye Bing , Yu Jianjun
Published: May 2024

In this work, we experimentally demonstrated MDM-WDM transmission of 4 modes × 80 WDM channels × 48 GBd PDM-64-QAM signals over 500 km of strongly coupled FMF with the aid of multi-label based multi-input multi-output neural network equalization (MIMO-NNE). The resulting net bit rate of 147.4 Tb/s and the 25% reach improvement comparing to traditional MIMO-LMS show great potential of MIMO-NNE in SDM systems.
Mechanism and First Experimental Demonstration of ILMD-induced Reduction of Intramodal Cross-phase Modulation in Weakly-coupled FMF Transmission
Authors: Zuo Mingqing , Qiao Gang , Yang Yu , Long Chengbin , Ge Dawei , Wang Dong , Li Yunbo , Chen Zhangyuan , Zhang Dechao , Li Han , Li Juhao
Published: May 2024

We for the first time experimentally analyze the interaction between intramodal XPM and ILMD effects in weakly-coupled FMF, and prove that the ILMD could be a major factor for effectively reducing the intramodal XPM impairments.
Throughput Increase in Multi-Fiber Networks using Partial Lane-Change Capabilities
Authors: Karandin Oleg , Musumeci Francesco , Pointurier Yvan , Tornatore Massimo
Published: May 2024

Effective application of lane change in multi-fiber (MF) networks is hindered by limitations in WSS-size in ROADMs. We show that introducing lane-change only at degree-2 nodes leads to significant throughput increase, for a commensurate additional equipment cost.
Optical Fiber Bendable at 3-mm Diameter for Optical Transceivers and Silicon Photonic Packaging
Authors: Chen Xin , Hurley Jason E. , Shu Yin , Li Ming-Jun
Published: May 2024

A 3-mm diameter bendable and mechanically reliable fiber for both O- and C-band wavelength windows is designed and fabricated. Bending losses of 0.036 dB/turn at 1310 nm and 0.39 dB/turn at 1550 nm are demonstrated.
Neural Network Model of a Second Stage L-band Amplifier using Experimental Training Sets
Authors: Rabbani Hamed , Monga Kaboko Jean-Jacques , LaRochelle Sophie , Rusch Leslie A.
Published: May 2024

Using experimental measurements with high-power input signals, we train a neural network model of the second stage of an L-band amplifier. With the model, we jointly optimize amplifier gain and noise figure (alternately gain flatness).
A Novel Low Complexity and Precise Transceiver IQ skew Calibration Method for Single Carrier Coherent System
Authors: Wang Wei , Wu Zhenpeng , Zou Dongdong , Li Fan , Li Zhaohui
Published: May 2024

We propose a novel precise transceiver IQ skew calibration method utilizing the specially designed training signal for single carrier coherent system. The results show that the estimation error can be within ±0.2ps.
A Silicon Photonic Chip-based System for 2.5-GHz Quantum Key Distribution (QKD)
Authors: Luo W. , Cao L. , Cai H. , Karim M. F. , Kwek L. C. , Liu A. Q.
Published: May 2024

We have demonstrated a compact, chip-based system for high-speed polarization-encoded QKD, which utilizes advanced silicon photonics technology and operates at a clock rate of 2.5 GHz. Our design enables secure key rates up to 1.018 Mbps at equivalent fiber distance of 100 km in the finite-size regime. The results of the proof-of-principle experiment indicate that this high-speed, chip-based QKD system is a viable, high-performance solution well-suited for upcoming quantum communication applications.
Integrating Quantum Key Distribution into TLS 1.3: A Transport Layer Approach to Quantum-Resistant Communications in Optical Networks
Authors: Garcia Carlos Rubio , Cano Abraham , Olmos J.J. Vegas , Rommel Simon , Monroy Idelfonso Tafur
Published: May 2024

We present an experimental quantum-resistant OpenSSL-based TLS 1.3 implementation using classical cryptography and QKD. This solution is ideal for high-performance scenarios with optical fiber communication where QKD potential can be leveraged.
Tailoring rate and latency of free space optical systems to turbulence conditions with probabilistic constellation shaping and data interleaving
Authors: Boddeda Rajiv , Ghazisaeidi Amirhossein , Bigo Sébastien , Rabeh Samar , Dovillaire Guillaume , Almonacil Sylvain , Mardoyan Haïk , Renaudier Jeremie
Published: May 2024

We show up to 250 Gbps per carrier transmission is achievable with digital coherent technologies at 65dB link-loss. We jointly optimize symbol-rate, probabilistic shaping and interleaving while replicating strong turbulence conditions. © 2024 The Author(s)
Transoceanic-Class WDM/SDM Transmission of PDM-QPSK Signals over Coupled 12-Core Fiber
Authors: Arikawa Manabu , Shibahara Kohki , Sakamoto Taiji , Imada Ryota , Nakajima Kazuhide , Miyamoto Yutaka , Le Taillandier de Gabory Emmanuel
Published: May 2024

We demonstrated long-haul transmission of 32-Gbaud PDM-QPSK over cou-pled 12-core fiber with standard cladding diameter. Error-free transmission after FEC was achieved up to 7280 km. The estimated rms MDL per 52-km span was 0.3 dB.
High Performance Silicon Nitride Passive Optical Components on Monolithic Silicon Photonics Platform
Authors: Chandran Sujith , Bian Yusheng , Lee Won Suk , Abumazwed Ahmed , Liu Neng , Xu Luhua , Ding Hanyi , Aboketaf Abdelsalam , Rakowski Michal , Dezfulian Kevin , Najafi Arman , Hirokawa Takako , Liu Qidi , Stricker Andy , Krishnamurthy Subramanian , McLean Kate , Sporer Ryan , Zhang Michelle , Song Shenghua , Wong Helen , Mosleh Salman , Deptuck Dan , Tinkler Janet , Lee Jae Gon , Gupta Vikas , Yu Anthony , Giewont Ken , Letavic Ted
Published: May 2024

We demonstrate low-loss silicon nitride passive optical components including straight and bend waveguides, 1×2MMI, 2×2MMI, directional-coupler and waveguide crossings on a monolithic silicon photonics platform. Hardware performance statistics substantiate the mass manufacturability of the building-blocks.
Transmitter Nonlinearity Mitigation Using Direct Learning Architecture Based Digital Predistortion Coefficients Identification
Authors: Gong Zepeng , Shi Fan , Luo Ming , Zhang Xu , Gong Yuhan , Li Xiang , Huang Tianye , Xiao Xi
Published: May 2024

We propose to identify the coefficients of digital predistortion equalizer based on direct learning architecture (DLA) for 100 GBaud 16QAM and 80 GBaud 64QAM transmission. Effective SNR improvement of 0.54dB and 0.66dB were experimentally verified.
Continuous 16.4-THz Bandwidth Coherent DWDM Transmission in O-band using a Single Fibre Amplifier System
Authors: Elson Daniel J. , Mikhailov Vitaly , Luo Jiawei , Beppu Shohei , Baxter Glenn , Stolte Ralf , Stewart Luke , Takasaka Shigehiro , Jarmolovičius Mindaugas , Sillekens Eric , Killey Robert I. , Bayvel Polina , Yoshikane Noboru , Tsuritani Takehiro , Wakayama Yuta
Published: May 2024

A record transmission bandwidth of 16.4 THz is demonstrated in O-band using a single optical amplifier system. Performance is optimised by simultaneously miti-gating inter-channel stimulated Raman scattering and nonlinear interference near the zero-dispersion frequency.
Wideband S, C, + L-Band Comb Regeneration in Large-Scale Few-Mode MCF Link with Single-Mode Seed Channel
Authors: Puttnam B. J. , Orsuti D. , Luis R. S. , Neves M. S. , van den Hout M. , Di Sciullo G. , Rademacher G. , Sakaguchi J. , Antonelli C. , Okonkwo C. , Palmieri L. , Furukawa H.
Published: May 2024

We use wideband optical frequency combs covering 134 nm to transmit >336 Tb/s in a single core of a multi-core, 3-mode fiber with a single-mode seed transmission core to regenerate synchronized local comb enabling simplified coherent reception.
4D Optical Link Tomography: First Field Demonstration of Autonomous Transponder Capable of Distance, Time, Frequency, and Polarization Resolved Monitoring
Authors: Sasai Takeo , Borraccini Giacomo , Huang Yue-Kai , Nishizawa Hideki , Wang Zehao , Chen Tingjun , Sone Yoshiaki , Matsumura Tatsuya , Nakamura Masanori , Yamazaki Etsushi , Kisaka Yoshiaki
Published: May 2024

We report the first field demonstration of 4D link tomography using a commercial transponder, which offers distance, time, frequency, and polarization-resolved monitoring. This scheme enables autonomous transponders that identify locations of multiple QoT degradation causes.
100-GHz-bandwidth InP-based On-board Coherent Tx Front-end enabling 2-Tb/s/λ Optical Transmission
Authors: Wakita Hitoshi , Nagatani Munehiko , Ogiso Yoshihiro , Nakamura Masanori , Hamaoka Fukutaro , Shiratori Yuta , Kobayashi Takayuki , Miyamoto Yutaka , Takahashi Hiroyuki
Published: May 2024

We present a 100-GHz-bandwidth coherent transmitter front-end consisting of a cost-effective PCB with a flip-chip-bonded InP-HBT-based driver IC and InP-MZM-based optical IQ modulator, which has successfully achieved a net-2.03-Tb/s/λ (192-GBaud PCS-100QAM) 80-km optical transmission.
Low-loss and Thermal-stable Ta2O5 Photonic Platform with Low-temperature Process
Authors: Geng Zhaoting , Cheng Weiren , Liu Zhenyu , You Mingjian , Yu Xiaolun , Wu Pengzhuo , Ding Ning , Tang Xingyu , Liu Yihan , Shen Li , Zhao Qiancheng
Published: May 2024

We demonstrate a Ta2O5 photonic platform with a propagation loss of 0.5dB/cm and a thermo-optic coefficient of 2.3×10-6 /K at 1550 nm. The process temperature is below 350℃, friendly to integration with other optoelectronic components.
Uncooled Operation of Directly Modulated Membrane Laser with Buried Sapphire Layer on Si Substrate
Authors: Hiraki Tatsurou , Maeda Yoshiho , Fujii Takuro , Takeda Koji , Aihara Takuma , Segawa Toru , Ota Yasutomo , Iwamoto Satoshi , Arakawa Yasuhiko , Matsuo Shinji
Published: May 2024

A membrane laser with a buried sapphire layer on Si has 3-dB bandwidths of 40-25 GHz at 25-80°C. The laser demonstrates 80-Gbit/s PAM4 operations up to 80°C at an energy cost of 0.77 pJ/bit.
Transmitter Impairment Mitigation by 8×2 Widely Linear MIMO Equalizer with Improved Frequency Offset Tolerance
Authors: Hu Xuemeng , Gong Zepeng , Wei PengPeng , Shi Fan , Xiao Xiao , Huang Tianye , Li Xiang
Published: May 2024

Transmitter impairment mitigation for 45GBaud DP-64QAM with 8×2 WL MIMO equalizer embedding CW-DA-WL phase estimator is demonstrated. Q penalty less than 0.5-dB with 8-ps IQ skew and 2.5-dB power imbalance are achieved with improved tolerance to frequency offset.
Frequency-Band Analysis of Equalization Enhanced Phase Noise Jointly with DSP Impact
Authors: Martins C. S. , Lorences-Riesgo A. , Mumtaz S. , Nguyen T. H. , Hraghi A. , Wu Z. , Frignac Y. , Charlet G. , Zhao Y.
Published: May 2024

The fundamental of equalization-enhanced phase noise (EEPN) jointly with the DSP impact is investigated, using an approach based on frequency-band segmentation of the frequency-noise (FN) spectrum. This approach enables to study the EEPN penalty of different FN spectral regions and correlated with its bursty nature.
Wavelength-Multiplexed Beam Steering in Fiber and Visible Light Communication Integrated Indoor Access Network
Authors: Niu Wenqing , Li Fujie , Xu Zengyi , Shen Chao , Li Ziwei , Shi Jianyang , Zhang Junwen , Chi Nan
Published: May 2024

We propose a wavelength-multiplexed fiber and VLC integrated access network. Neural networks with a generator-model structure are employed for single-hologram-based wavelength-multiplexed beam steering. A 2 transmission with overall data rate of 4.02 Gbps is demonstrated.
Highly pure 4-qubit states fully integrated in a programmable silicon-photonic chip
Authors: Lee Jong-Moo , Park Jiho , Bang Jeongho , Sohn Young-Ik , Baldazzi Alessio , Sanna Matteo , Azzini Stefano , Pavesi Lorenzo
Published: May 2024

We demonstrate 98% Hong-Ou-Mandel (HOM) visibility, 82% Green-berger–Horne–Zeilinger (GHZ) fidelity, and Bell’s inequality violations by 4-photon coincident measurements using a silicon-photonic chip including photon-pair sources, filters, and linear-optic gates.
S+C+L WDM Coherent Transmission with >1-Tb/s/λ Signals
Authors: Hamaoka Fukutaro , Nakamura Masanori , Kobayashi Takayuki , Miyamoto Yutaka , Yamazaki Etsushi , Kisaka Yoshiaki
Published: May 2024

Ultra-wideband wavelength-division-multiplexed (WDM) transmission is an essential technology to achieve >100-Tb/s single-mode-fiber (SMF) capacity. This paper overviews the status of high-capacity SMF transmission and provides our research results using high-symbol-rate coherent channels under a triple-band WDM configuration.
High-Capacity and High-Spectral Efficiency Transmission Systems for 1.6 Tb/s and Beyond
Authors: Pittalà Fabio
Published: May 2024

Trends and challenges to achieve high-capacity and high-spectral efficiency transmissions for different fiber-optic applications are discussed focusing on 1.6 Tb/s/carrier. Recent research records, industry status and standardization progress of coherent optical interfaces are also reviewed.
Single-Fiber Bidirectional Transmission using 400G Coherent Digital Subcarrier Transceivers
Authors: Torres-Ferrera Pablo , Sime Jacqueline , Duthel Thomas , Virgillito Emanuele , Curri Vittorio , Gaudino Roberto , Fludger Chris , Napoli Antonio
Published: May 2024

We experimentally evaluate the Rayleigh Back-Scattering power penalty in a single-fiber single-wavelength bidirectional link using coherent digital subcarrier-based transceivers and verify a theoretical model in this scenario. A negligible penalty is achieved by using subcarrier-interleaving.
Adaptive all-optical sigmoid activation functions for Photonic Neural Networks using Fabry-Perot laser diodes under optical injection
Authors: Atanasijević Petar , Pappas Christos , Banović Mladen , Crnjanski Jasna , Tsakyridis Apostolos , Moralis-Pegios Miltiadis , Vyrsokinos Konstantinos , Krstić Marko , Mihailović Peđa , Petričević Slobodan , Pleros Nikos , Gvozdić Dejan
Published: May 2024

We experimentally validate the all-optical activation functions in Fabry-Perot lasers under optical injection for random and non-random inputs. Sigmoid-like activations for 100 ps pulses are reconfigured using injection parameters, consuming 1.4 pJ per nonlinear operation.
Inference and training in deep learning using a symmetric optical crossbar array
Authors: Tang Rui , Ohno Shuhei , Tanizawa Ken , Ikeda Kazuhiro , Okano Makoto , Toprasertpong Kasidit , Takagi Shinichi , Takenaka Mitsuru
Published: May 2024

We propose and demonstrate a symmetric optical crossbar array based on microring resonators (MRRs) to accelerate both the inference and training in deep learning, experimentally achieving a 93.3% classification accuracy in an inference task.
50G Burst-Mode Receiver Using Monolithic SOA-UTC and Burst-Mode TIA
Authors: Breyne L. , Caillaud C. , Gurne T. , Paret J.-F. , Straub M. , Coudyzer G. , Mekhazni K. , Verplaetse M.
Published: May 2024

We demonstrate a 50G-PON upstream SOA-UTC based receiver integrated with a BM-TIA, without optical filtering. The OMA sensitivity is -24.3 dBm, the dynamic range exceeds 20 dB and the loud-soft penalty is 1 dB.
Multi-Channel Coherent Optical System Based on A High Power Fabry-Perot QW Laser Diode
Authors: Raisa Sharmila , Ghosh Shalmoli , O’Sullivan Maurice , Laperle Charles , Hui Rongqing
Published: May 2024

We demonstrate 20-channel coherent transmission using a high-power single-section QW FP-laser diode over 78.3 km single mode fiber. The system capability can reach > 4Tb/s with a single laser in the transmitter using polarizations multiplexing.
Real-Time Demonstration of Softwarized Low-Complexity Timing Recovery by CMA Filter Interpolation for Baud-Rate Sampling DSP
Authors: Suzuki Takahiro , Kim Sang-Yuep , Kani Jun-ichi , Yoshida Tomoaki
Published: May 2024

This paper proposes a low-complexity timing recovery method and demonstrates the real-time softwarization of a baud-rate sampling DSP suite. It achieves a 38 % reduction in processing time with no penalty in sampling phase tolerance.
1.92-Tb/s CPRI-Equivalent Rate Direct Detection Transmission based on ANN Pre-Equalization for Digital-Analog Radio-over-Fiber Mobile Fronthaul
Authors: Zhao Junhao , Yan An , Li Guoqiang , Li Zhongya , Shen Wangwei , Hu Yongzhu , Chi Nan , He Zhixue , Zhang Junwen
Published: May 2024

We experimentally demonstrate a 1.92-Tb/s CPRI-equivalent data-rate supporting 1024-QAM OFDM signal in a direct-detection-based digital-analog radio-over-fiber mobile-fronthaul link using ANN for signal pre-equalizations. Performances of pre-equalizers or post-equalizers based on different methods are also studied.
Band aggregators for band-unaware multi-band CDC-ROADM
Authors: Suzuki Kenya , Fukutoku Mitsunori
Published: May 2024

We report on the concept of a multi-band CDC-ROADM network without network operators being aware of the differences between bands and its enabling devices, i.e., band aggregators.
Cost-effective ROADM Using Wide-bandwidth Silicon Tunable Ring Filter for Drop Operation
Authors: Matsumoto Ryosuke , Konoike Ryotaro , Matsuura Hiroyuki , Suzuki Keijiro , Inoue Takashi , Ikeda Kazuhiro , Namiki Shu , Sato Ken-ichi
Published: May 2024

We develop a ROADM using an 8-channel integrated polarization-insensitive, wide-bandwidth silicon tunable ring-filter for signal drop. A 75-GHz-spaced 60-channel 200-Gb/s DP-QPSK signal is transmitted over 640 km (8 span × 80 km) without any penalty.
Dual-Polarization Phase Retrieval Receiver in Silicon Photonics
Authors: Stern Brian , Huang Hanzi , Chen Haoshuo , Kim Kwangwoong , Idjadi Mohamad Hossein
Published: May 2024

We demonstrate an integrated dual-polarization phase retrieval receiver. It uses silicon waveguides and resonators to recover phase from intensity-only measurements. We show retrieval of a polarization-division multiplexed 30-GBd QPSK signal over 80 km of SSMF.
On the Accuracy of Power Profile Estimation using MMSE or Deconvoluted Correlation-Based Profiles
Authors: May Alix , Boitier Fabien , Remigio Ana Ore , Layec Patricia
Published: May 2024

We evaluate the accuracy of the deconvolution of the longitudinal power profile computed using correlation-based method. We show that we obtain a similar accuracy to the MMSE approach in different cases.
State-of-Polarization Monitoring Employing Optical Supervisory Channel Enabling Instantaneous Fluctuation Detection and Localization
Authors: Sasaki Yusuke , Sato Masaki , Noguchi Hidemi , Hosokawa Kohei
Published: May 2024

We demonstrate a state of polarization monitoring system employing an optical supervisory channel can detect even short fluctuations of 10 s with precise localization in the experiment over an FPGA.
Privacy Preserving Digital Twin Knowledge Sharing for Multi-domain Networks
Authors: Ruiz Marc , Velasco Luis
Published: May 2024

Knowledge sharing techniques among OCATA optical layer digital twin instances are proposed for multi-domain scenarios. Intra-domain model transformations are performed to guarantee privacy of intra-domain topology. Remarkable accuracy to estimate multi-domain lightpaths QoT is shown.
Yb-doped Fibers for kW-Class Fiber Lasers
Authors: Rosales-García A. , Nicholson J.W. , Jensen R. , Kristensen P. , Pincha J. , Ovtar S. , Mitrovic M. , Ingerslev K. , Edvold B. , Christensen S. , DiGiovanni D. , Pálsdóttir B.
Published: May 2024

We demonstrate a TMI-free 5.2 kW single-mode output from a fiber amplifier using Yb 20/400 fibers with reduced core thermo-optic coefficient. The TMI threshold is increased by 50% compared to that of commercial Yb-doped fibers.
Circuit Implementation of Pilot-Based Dynamic MIMO Equalization for Coupled-Core Fibers
Authors: Börjeson Erik , Deriushkina Ekaterina , Mazur Mikael , Karlsson Magnus , Larsson-Edefors Per
Published: May 2024

We explore ASIC implementation for pilot-based MIMO equalizers for coupled-core transmission, considering chip area scaling trends and performance impact of time-dependent drift. For a system with 28-GBd subcarriers, an equalizer for 8 ×8 is 5.3 times larger than for 2 × 2.
On the Impact of Spatial Mode Dispersion for Mode-dependent Loss Estimation and Mitigation in Coupled-core MCF Links
Authors: Mao Meng , Chen Bin , Xu Rendong , Sun Lin , Xiong Junjie , Ma Lin , Shen Gangxiang , Liu Gordon Ning
Published: May 2024

Impact of SMD on MDL estimation and mitigation in CC-MCF links is theoretically investigated. SMD below 10 ps/km is mandatory to ensure the efficient MDL mitigation in 1000-km CC-MCF links.
A Low Complexity Coherent 16×400 Gbit/s 4SC-16QAM DSCM system with Precise Transceiver IQ Skew Compensation and Simplified Equalization
Authors: Wang Wei , Zou Dongdong , Wu Zhenpeng , Yi Xingwen , Sun Wei , Li Fan , Li Zhaohui
Published: May 2024

1. Introduction Digital subcarrier multiplexing (DSCM) technique has been regarded as an attractive solution in power consumption sensitive datacenter interconnect (DCI), which exhibits the potential in the simplification of the dispersion compensation [1, 2]. However, compared to the conventional single carrier system, the DSCM signal is more sensitive to the transceiver IQ shew. The subcarriers will suffer severe interference from symmetrical frequency subcarriers in the presence of transceiver IQ skew, especially for the subcarriers located at high frequency, causing seriously performance degradation [3]. Multiple-in multiple-out (MIMO) equalizer is an effective method to address IQ skew impairments [4]. Different from the single-carrier system, an 8×8 real-value MIMO equalizer is required for a symmetric subcarrier pair in DSCM systems, resulting in high computational complexity [5, 6]. In this paper, we propose a novel low-complexity transceiver IQ skew estimation method based on specially designed training signal to compensate both the Tx-skew and Rx-skew for DSCM systems to avoid complicated 8×8 real-value MIMO equalizer. Besides, to further reduce the computational complexity of the Rx-DSP, a simplified equalizer structure embedded a 1-tap phase factor is also proposed, which cascades a 1-tap 2×2 MIMO and two Ntap single-in single-out (SISO) equalizers. The proposed method is proved in 50Gbaud 4SC-16QAM DSCM WDM system with 16 channels. The results show that about 6dB OSNR gain can be obtained at the HD-FEC threshold after transceiver IQ skew compensation. And there is almost no performance penalty of the proposed simplified equalizer compared to the conventional CMMA combined blind phase search (BPS) method. According to the results, the proposed low complexity coherent DSCM scheme is a promising solution for DCI applications. Fig. 1. Experimental setup and DSP flow. (a) Training signal structure.
Enhanced Carrier Phase Recovery for Spectral-efficient Digital Subcarrier Multiplexing Transmissions
Authors: Xiang Meng , Yan Sailan , Wei Can , Lv Hong , Li Jianping , Fu Songnian , Qin Yuwen
Published: May 2024

We demonstrate a performance enhanced carrier-phase-recovery (CPR) method for spectral-efficient digital-subcarrier-multiplexing transmissions with two-interleaved-pilot-tones. By reconstructing and compensating transmitter-side and receiver-side laser phase noises separately, equalization-enhance-phase-noise (EEPN) can be circumvented.
CD-Aware OCT Precoding for C-Band 100-Gb/s IM/DD OFDM Transmission over 50-km SSMF
Authors: Zhang Junwei , Lu Liwang , Tan Heyun , Hong Xiaojian , Fei Chao , Zhong Kangping , Lau Alan Pak Tao , Lu Chao
Published: May 2024

A CD-aware orthogonal-circulant-matrix-transform (OCT) precoding is proposed for C-band 100-Gb/s IM/DD-OFDM transmission over 50-km SSMF. The proposed scheme outperforms conventional schemes and improves the capacity by >20% (>12%) compared to CD-aware subcarrier loading (DFT precoding).
Simultaneous IM/DD Data Transmission and High-Rate Secret Key Distribution over a Single C-band Channel
Authors: Jachura M. , Szlachetka J. , Kucharczyk M. , Jarzyna M. , Kolenderski P. , Turkiewicz J. P. , Banaszek K.
Published: May 2024

We demonstrate hierarchical multiscale PAM-4 transmission combining 500 Mbps data transfer with optical-layer cryptographic key distribution at rates 24.14 Mbps and 8.38 Mbps secure against passive eavesdropper advantage 0 dB and 6 dB respectively.
Port-Agnostic Path Establishment with Point-to-Multipoint Control of Remote User Terminals for Metro/Access-Integrated All-Photonics Network
Authors: Igarashi Ryo , Kaneko Shin , Kimura Yasutaka , Shibata Naotaka , Suzuki Takahiro , Fujiwara Masamichi , Kani Jun-ichi , Yoshida Tomoaki
Published: May 2024

We propose a port-agnostic initial-connection sequence allowing simultaneous connection of multiple user terminals (UTs), and demonstrate end-to-end wavelength-path and fiber-path establishment for DWDM and non-DWDM UTs through point-to-multipoint-type remote UT control in Metro/Access-Integrated All-Photonics Network.
A Cost-efficient 1.28 Tb/s DWDM Receiver using All-Si Double Microring Avalanche Photodiodes
Authors: Peng Yiwei , Yuan Yuan , Sorin Wayne V. , Cheung Stanley , Huang Zhihong , Liang Di , Fiorentino Marco , Beausoleil Raymond G.
Published: May 2024

We demonstrate a novel 8-channel all-Si double-MRR RX with record-high 1.28 Tb/s aggregated data rate and ultra-low -50 dB crosstalk, which can compete with the commercial RXs and promises ~ 40% chip cost saving.
Single Wavelength Laser TO-CAN Integrated with One-Chip Wavelength Locker
Authors: Suzuki Junichi , Hasegawa Kiyotomo , Masuyama Kei , Ohata Nobuo
Published: May 2024

A φ5.6-mm TO-CAN packaged light source module integrated with a Si photonics-based wavelength locker chip has been fabricated with a frequency shift of less than ±1.1 GHz, small enough to achieve wavelength locking operation with a compact TO-CAN package for short-reach coherent communication.
Experimental demonstration of error detection-driven nonlinearity compensation for optical fiber communication systems
Authors: Yankov Metodi P. , da Silva Edson Porto , Forchhammer Søren
Published: May 2024

We demonstrate how the error-detection capabilities of the inner code in an experimental rate-adaptive concatenated FEC scheme can be employed to reduce the computational complexity of the nonlinearity compensation block. Total complexity savings between 17% and 95% are reported depending on the target operating point.
Importance of the Contentionless OXC Property for WDM Networks Handling the Fastest Optical Channels
Authors: Zami Thierry
Published: May 2024

This paper explains why the contentionless property becomes more than only “nice to have” in the add/drop stages of wavelength-routing OXCs with fewer channels in the C-band as channel symbol rate still significantly grows.
Wavelength-stable transmitter at ONU by using burst SOA for coherent TDM-PON
Authors: Tan Acai , Li Zhengxuan , Luo Siyu , Xin Zheng , Yang Qinyao , Song Yingxiong
Published: May 2024

We propose and experimentally demonstrate a wavelength-stable upstream transmission system for coherent TDM-PON by using a burst-mode SOA at the ONU, which is capable of supporting more than 512 ONUs with high performance and reliability.
Impact of Symbol Rate Optimization and Laser Frequency Stability on Transmission Reach of Super-Channel Transceiver Configurations for Beyond 1.6 Tb/s
Authors: Vassilieva Olga , Kim Inwoong , Irie Hiroyuki , Nakashima Hisao , Hoshida Takeshi , Palacharla Paparao
Published: May 2024

We show that subcarrier symbol rate optimization and better laser frequency stability can maximize transmission reach of super-channels. Configurations with 1.6Tb/s subcarriers achieve longer reach with benefits of smaller size/power and easier management.
Comparison of Feedback and Feedforward Clock Recoveries for Ultra-Fast Synchronization in Passive Optical Networks
Authors: Matalla Patrick , Koos Christian , Randel Sebastian
Published: May 2024

We compare digital non-data-aided feedback and feedforward clock recoveries for burst-mode operation in high-speed PONs. For 56 GBd NRZ, PAM2, and PAM4, we demonstrate that a clock frequency offset of 20 ppm can be synchronized within 40.96 ns.
Large-scale integrated focal plane array for two-dimensional scanning
Authors: Yu Lei , Xin Yifan , Wang Pengfei , Luo Guangzhen , Ma Pengfei , Wang Zheng , Chen Licheng , Yang Yibo , Zhang Yejin , Pan Jiaoqing
Published: May 2024

The focal plane array is regarded as a promising solution for LiDAR. In this work, we present an ultra-large-scale focal plane array featuring 1024 antennas and 2113 micro-rings with a FoV of 85.7° × 29.5°.
A Multi-Channel Chromatic Dispersion Compensation for 15-km Front-Haul Transmission
Authors: Ren Yang , Wu Yangbo , Tu Zhengrui
Published: May 2024

We report an integrated Bragg grating based multi-wavelength dispersion compensation. We achieve +20 ps/nm and -28 ps/nm at 1270 and 1335nm, with a on-chip loss of 4dB, showing a broadband dispersion compensation capability.
High-performance chiral mode switching device at 2 μm waveband using photonic crystal waveguide
Authors: Li Kang , Peng Hejie , Wang Siwei , Chen Lin , Wang Jian
Published: May 2024

We experimentally demonstrate a silicon chiral mode switching device by dynamically encircling exceptional point at 2 μm waveband, with high purities (> 95%) for both TE0 and TE1 modes in a broad bandwidth (85 nm).
Topological Rotation Symmetry-Based Wavelength Allocation for Entanglement Distribution Networks
Authors: Zhu Jiali , Cao Yuan , Li Jian , Zhou Xingyu , Zhang Chunhui , Yu Xiaosong , Zhao Yongli , Zhang Jie , Wang Qin
Published: May 2024

We propose a wavelength allocation scheme based on topological rotation symmetry for entanglement distribution networks, reducing the number of wavelength channels required for users from the order of O(N) to
O(N).
Integrated Silicon Photonics Transmitter and Receiver Array Modules Enabling 1 Tb/s Interboard Optical Interconnect over 8-channel Polymer Optical Waveguide
Authors: Yang Chao , Li Chao , Chen Daigao , Luo Ming , Zhu Ying , He Zhixue , Liu Xu , Ma Lin , Xiao Xi
Published: May 2024

1-Tb/s PS-PAM-4 interboard optical interconnect using integrated SiPh transmitter and receiver array modules over an 8-channel polymer optical waveguide is proposed and experimentally demonstrated, achieving a low-cost and high-speed solution for short-range optical interconnects.
Chirp-Dispersion Interaction-enabled Uneven Optical PAM-4 based on Dual-drive MZM for 5.9-dB SNR Gain in Digital RoF Fronthaul with Quantizer Compatibility
Authors: Hu Yimin , Zhu Yixiao , Yang Guangying , Zhang Ziheng , Man Lina , Cheng Ziyu , Hu Weisheng
Published: May 2024

We theoretically model and explain the dispersion-induced eye closure/open in dual-drive MZM-based system and leverage the effect for uneven optical PAM-4 digital radio-over-fiber fronthaul. We evaluated two quantizers and 5.9-dB SNR gain is experimentally achieved.
Polarization-Insensitive Simplified Self-Heterodyne Detection Based on Optical Frequency Comb in MCF Transmission System
Authors: Li Jie , Luo Ming , Li Xiang , He Qinyu , Gong Yuhan , Zhang Xu , Gong Zepeng , Xiao Xi
Published: May 2024

We propose a polarization-insensitive space-division multiplexing scheme with self-heterodyne detection by simplified one balanced photodiode receiver based on optical frequency comb. A 17×200-Gb/s 16QAM transmission over 1-km 19-core fiber using low-cost DFB laser is demonstrated.
Measurement of optical signal state of polarization in OPGW under lightning strike condition
Authors: Tong Fei , Hu Kaijing , Li Wei , Yu Shaohua , Lian Weihua , Zhao Hanqi , Wu Bin , Hong Danke , Luo Ming , Hu Qianggao , Xu Jian
Published: May 2024

We monitored the polarization state of the power grid Optical Ground Wire (OPGW) cable for three months in 100G-OTN system and unprecedented detected the maximum state of polarization (SOP) rotation speed of 43Mrad/s.
Wide-angle vertical coupling gratings enabled by nano-imprinted microlens array
Authors: Xiao Gan , Zhang Xuanming , Lou Fei , Lei Lei , Cheng Xin
Published: May 2024

We experimentally show a vertical grating coupler featuring extended coupling angles through nano-imprinted lens array. This nanostructure exhibits a 2-3.4 dB increase in coupling efficiency within the ±15° angular range compared to the bare device.
Net-1.8 Tbps/λ Transmission Enabled by C+L-band InP-based Coherent Driver Modulator
Authors: Ozaki Josuke , Ogiso Yoshihiro , Yamazaki Hiroshi , Nakamura Masanori , Sugiura Kenta , Nagashima Kazuya , Hashizume Yasuaki , Nunoya Nobuhiro , Miyamoto Yutaka , Ishikawa Mitsuteru
Published: May 2024

Using a newly developed InP-based C+L-band supported coherent driver modulator with an electro-optic 3-dB bandwidth above 90 GHz, an 80km transmission with a net bit rate of 1.8Tbps/λ in the C+L band was successfully demonstrated.
Fully integrated silicon photonic high-speed transmitter with Ring-Assisted Mach-Zehnder modulator
Authors: Wu Xinru , Huang Duanni , Kumar Ranjeet , Su Guan-Lin , Gao Junyi , Liu Songtao , Wang Xiaoxi , Rong Haisheng
Published: May 2024

We report a fully integrated transmitter which includes a DFB laser and a push-pull drive ring-assisted Mach-Zehnder modulator. We demonstrate 224Gb/s PAM-4 transmission with 1.8Vppd differential driving swing and transmitter penalty (TDECQ) of 1.25dB.
Is unceasing increase of channel symbol rate the panacea for WDM transparent meshed networks?
Authors: Zami Thierry , Rossi Nicola , Lavigne Bruno
Published: May 2024

In the context of transparent meshed WDM networks, we illustrate and explain why very large channel symbol rate (288 GBd) can adversely reduce the achievable total network capacity, whilst still improving global expenditures per Gb/s.
Networking Benefits of Coherent Pluggable Optics
Authors: Pedro João
Published: May 2024

This paper overviews the range of applications of coherent pluggable optics. Selected simulation results highlight how deploying devices that feature both high-performance and digital subcarrier multiplexing is a key enabler of cost-effective network solutions.
Tailoring Transceiver Designs for Subsea
Authors: Varughese Siddharth , Lavery Domaniç , Mertz Pierre
Published: May 2024

Unique challenges that subsea cables introduce which influence optical transceiver design are described. DSP algorithms that address these challenges are discussed and the use of subsea transceivers for seismic sensing is also introduced.
66.8 Tb/s Real-Time C+L Unrepeatered Transmission over 301 km using Forward and Backward Raman Amplification
Authors: de Jauregui Ruiz Ivan Fernandez , Abdukerim Nurmemet , van Weerdenburg John , Gerard Thomas , Vaquero Caballero F. J. , Buset Jonathan M. , Galdino Lidia
Published: May 2024

We demonstrate record real-time 66.8 Tb/s over 301 km unrepeatered fiber transmission based on commercial 100.4 GBaud PCS-64QAM digital subcarrier-based transponders and commercial 9.6 THz multi-band C+L line system employing forward and backward Raman amplification.
First Demonstration of Net-1.6-Tbps 4λ-WDM in 150-GHz-Grid IM/DD Transmission with a Single DAC/channel and Advanced DSP for Intra-Datacenter-Interconnects
Authors: Yan An , Li Guoqiang , Xing Sizhe , Hu Yongzhu , Shen Wangwei , Li Ziwei , Shen Chao , Shi Jianyang , Xiao Xi , He Zhixue , Chi Nan , Zhang Junwen
Published: May 2024

For the first time, we experimentally demonstrate net-400-Gb/s/lane 150-GHz-spaced 4λ-WDM transmission over 0.5-km SSMF in C-band for intra-datacenter-interconnects based on 128-GBaud probabilistically shaped PAM-20, using a single DAC per channel and driver-free, high-bandwidth TFLN modulators.
Broadband Single Flat Narrow Beam Shaped Time-domain Adaptive Modulation for Underwater Transmission with Wavelength Characteristics in Blue-green WDM System
Authors: Kodama Takahiro , Kobori Fumiya , Kariya Ayumu , Tanaka Keita , Kuwahara Kiichiro
Published: May 2024

We experimentally demonstrated that time-domain adaptive modulation per wavelength optimizes the underwater transmission capacity of a broad-spectrum WDM-TDHP comprising 450 nm and 520 nm wavelengths, shaped into a flat-narrow beam using a Galileoscope-type beam shaper.