bluuebunny/crossref_metadata_2025 huggingface dataset:
Homemade low-cost fabrication technique and stability analysis of a U-shaped fiber sensor structure
Authors: Lang Xianzheng , Liu Xuecheng , Zhang Wen , Singh Ragini , Li Guoru , Xie Yiyan , Zhang Bingyuan , Kumar Santosh
Published: May 2023

In this work, the fabrication method of a U-shaped optical fiber (UOF) structure using single-mode fiber is proposed. Few UOF sensors have been developed to date, but the fabrication process has not been described in detail. Here, its subsequent homemade fabrication, optimization strategies, and analysis are thoroughly explored. Further, the influence of transmission on U-shaped diameter is explored. The transmitted intensity is mainly used to assess the strength of the evanescent field. For this purpose, three different diameters of 2 mm, 4 mm, and 6 mm UOFs are fabricated. The results show that the transmission of the U-shaped structure is dependent on the diameter of the UOF. Thereafter, different concentrations of glucose solutions are detected using the optimized stable UOF structure to showcase the sensing properties. Overall, this work is essential for beginners who want to conduct research on optical fiber sensors with a curved shape.
Modal Gain Equalization of Few-mode Erbium-doped Fiber Amplifiers Enabled by Mirrored Mode Exchanges
Authors: Xu Tao , Yang Zhiqun , Liu Yaping , Guo Qiang , Zhou Rui , Xiao Xinhua , Li Wenhao , Li Wei , Du Cheng , Huang Zhanhua , Zhang Lin
Published: May 2023

We propose a six-mode erbium-doped fiber amplifier with significantly reduced differential modal gain (DMG) by mirrored exchanging of the spatial modes for the first time. A DMG of <1.8 dB across the whole C-band is experimentally achieved.
Power Efficient Core Pumped Multicore Erbium Doped Optical Fiber Amplifier
Authors: Ohtsuka Takafumi , Kikuchi Takahiro , Suganuma Takahiro , Hasegawa Takemi , Tazawa Hidehisa
Published: May 2023

A core pumped 4-core erbium doped optical fiber amplifier with a pump fan-in integrated combiner achieved the highest optical power conversion efficiency of 32.2% among reported C-band multicore erbium doped optical fiber amplifiers.
Self-Coherent Transmission Using Metasurface-based Stokes-Vector Receiver
Authors: Soma Go , Nomoto Yoshiro , Umezawa Toshimasa , Yoshida Yuki , Nakano Yoshiaki , Tanemura Takuo
Published: May 2023

Stokes-vector receiver with compact metasurface and two-dimensional photodetector array is developed to demonstrate 15-Gbaud 16QAM self-coherent transmission over 25-km single-mode fiber. Surface-normal configuration enables direct coupling to multicore fibers in the future highly parallelized systems.
Man-in-the-Middle Attacks Through Re-Shaping I-Q Optical Constellations
Authors: Ruiz Marc , Comellas Jaume , Velasco Luis
Published: May 2023

A module to re-shape optical constellations making the optical signal resembles as it has traversed some distance is presented. Armed with this module, Main-in-the-Middle attacks can be performed, which could be undetectable by security systems.
Impact and Mitigation of Mode-Dependent Gain in Ultra-Long-Haul SDM Systems
Authors: Mello Darli A. A. , Ospina Ruby S. B. , Srinivas Hrishikesh , Choutagunta Karthik , Chou Elaine , Kahn Joseph M.
Published: May 2023

The effect of mode-dependent gain in ultra-long-haul optical SDM systems with coupled channels is reviewed. Simulation results indicate stringent MDG requirements for future SDM amplifiers. Challenges in MDG estimation are also addressed.
106-Gbps PAM4 Operation at an Extinction Ratio above 3.5 dB using a Conventional Buried-Heterostructure Directly Modulated Laser
Authors: Shinohara Kosuke , Miyagoshi Ryosuke , Suzuki Yosuke , Suzuki Ryoko , Sakaino Go , Shimada Masaaki , Matsumoto Keisuke
Published: May 2023

A 106-Gbps PAM4 operation with an extinction ratio above 3.5 dB and TDECQ values of 1.85 and 3.04 dB was demonstrated using a conventional buried-heterostructure directly modulated laser at temperatures of 25 and 55 °C.
Field Demonstration of Disaggregated Optical Network Consisting of ZR+ and Coherent Channels using Power Equalization by Switched Gain Equalization Controlled Amplifiers
Authors: Chatterjee Sumit , Sanghi Deepak , Maheshwari Praveen , Anchal Abhishek , Lichtman Eyal
Published: May 2023

We report a field trial of 400G-ZR+ QSFP-DD-DCO and ten coherent channels, interoperating with oFEC between two different vendors. We equalize the power by switched gain equalization controlled amplifers. Field trial is verified by simulations.
Branch Identification in Passive Optical Networks using Machine Learning
Authors: Abdelli Khouloud , Tropschug Carsten , Grießer Helmut , Jansen Sander , Pachnicke Stephan
Published: May 2023

A machine learning approach for improving monitoring in passive optical networks with almost equidistant branches is proposed and experimentally validated. It achieves a high diagnostic accuracy of 98.7% and an event localization error of 0.5m.
High-rate continuous-variable measurement-device-independent quantum key distribution
Authors: Hajomer Adnan A.E. , Nguyen Huy Q. , Andersen Ulrik L. , Gehring Tobias
Published: May 2023

We report the first continuous-variable measurement-device-independent QKD system generating secret keys at 5 MBaud without frequency and phase locking. We achieve this using a relay structure based on a polarization 90-degree optical hybrid and well-designed DSP.
Relationship between Polarization Mode Dispersion and Crosstalk in Heterogeneous Multi-core Fibers with Different Cladding Diameters
Authors: Ocampo Gustavo , Sato Takanori , Fujisawa Takeshi , Nakagawa Mayu , Saitoh Kunimasa
Published: May 2023

We experimentally investigate the relationship between crosstalk and polarization mode dispersion (PMD) in two heterogeneous multi-core fibers with different cladding diameters. We observed that increasing the cladding diameter improves the crosstalk, but deteriorates the PMD.
Low-Loss, High Extinction Ratio Fiber to Chip Connection via Laser Fusion for Polarization Maintaining Fibers
Authors: Kumar Sushant , Nauriyal Juniyali , Cardenas Jaime
Published: May 2023

We present a new method for PM-fiber to photonic chip connection via laser fusion. This enables low cost and robust coupling with -1.1dB loss per facet while maintaining 20dB or greater polarization extinction ratio.
Nonlinearity Free Operation of SOA for Use in High-Capacity Co-Packaged Optics
Authors: Kurosu Takayuki , Suda Satoshi , Namiki Shu , Amano Takeru
Published: May 2023

We propose a novel concept to generate high-capacity WDM signals from single source of non-mode-locked multi-wavelength light using SOAs. Using micro-ring modulators in a way to suppress SOA nonlinearity, high-quality PAM4 signals can be generated.
Enhanced Velocity Sensitivity in 4-D FMCW LiDAR by Use of Avalanche Photodiode with Cascaded Multiplication Layer
Authors: Ahmad Zohauddin , Ou Sung-Yi , Su Wei-Chih , Wang Po-Shun , Naseem  , Chen Jyehong , Hung Yung-Jr , Chang You-Chia , Wei Chia-Chien , Horng Tzyy-Sheng , Shi Jin-Wei
Published: May 2023

A 4-D FMCW LiDAR is demonstrated. In comparison to the traditional p-i-n PD in its receiver-side, the cascaded M-layers APDs provide a better quality of 4-D images with unprecedented high velocity- sensitivity (5µm/sec) for slow-moving objects.
Coherent LiDAR Prototype Based on 2D MEMS Mirror Scanning
Authors: Cwalina Sarah , Kottke Christoph , Laske Norman , Jungnickel Volker , Freund Ronald
Published: May 2023

We present a new coherent LiDAR prototype with two-dimensional micro-electro-mechanical-system scanning and walk-off mitigation capability. We address the linearization challenge of the FMCW transmitter, the scan-capture-synchronization and pro-vide point-clouds of two distinct objects.
Data Augmentation to Reduce Computational Complexity of Neural-Network-Based Soft-Failure Cause Identifier
Authors: Khan Lareb Zar , Freire Pedro J. , Pedro João , Costa Nelson , Napoli Antonio , Sambo Nicola
Published: May 2023

We investigated data augmentation to train neural networks (NNs) for soft-failure cause identification, demonstrating its impacts on NN complexity. Results indicate up to 68% reduction in the computational complexity of NN for each inference.
Optical Network Diagnostics Using Graph Neural Networks and Natural Language Processing
Authors: Xu Xiaonan , Chen Haoshuo , Simsarian Jesse E. , Ryf Roland , Mazur Mikael , Dallachiesa Lauren , Fontaine Nicolas K. , Neilson David T.
Published: May 2023

We propose an AI-powered network diagnostic strategy including alarm clustering and fault localization with >98% accuracy for up-to 16-degree ROADMs and demonstrate the advantages of using NLP in encoding.
Calculating with Phase Opens up the High-Precision and High-Reconfigurability Integrated Photonic Computing
Authors: Wu Yuepeng , Guo Hongxiang , Zhang Bowen , Tao Ran , Guo Yi , Zhang Tian , Qiu Jifang , Wu Jian
Published: May 2023

We propose and experimentally demonstrate a novel phase-based optical computing system integrated with photonic AD/DA converters. Further simulation shows that our system can perform 15-bit arithmetic operations when the SNR is around 34 dB.
Optical Network Tomography: Demonstration of Anomaly Loss Monitoring and Fiber-Type Identification
Authors: Shinzaki Ryu , Eto Motohiko , Tajima Kazuyuki , Sone Kyosuke , Yoshida Setsuo , Oda Shoichiro , Kim Inwoong , Vassilieva Olga , Palacharla Paparao , Hoshida Takeshi
Published: May 2023

We demonstrate optical network tomography software prototype for localization of anomaly loss and fiber-type identification based on the estimated optical power profile using experimentally measured waveform data in a multi-span transmission testbed.
Live Demonstration of ML-based PON Characterization and Monitoring
Authors: Brügge Maximilian , Müller Jasper , Patri Sai Kireet , Jansen Sander , Zou Jim , Althoff Stephanie , Förster Klaus-Tycho
Published: May 2023

We demonstrate a machine learning-based solution for optical time-domain reflectometry devices which can assist in the classification and monitoring of reflective events in a passive optical network.
Definition of Mode Field Diameter for Few-Mode Fibers based on Stationary Expression of Propagation Constant
Authors: Nakamura Atsushi , Ohashi Masaharu , Koshikiya Yusuke
Published: May 2023

We derive a novel definition of mode field diameters (MFDs) for few-mode fibers (FMFs) from the wave equation. The MFDs obtained with our definition are useful in evaluating splice losses of each mode in FMFs.
Fully Integrated III-V-on-Silicon Multi-Port DFB Laser Comb Source for 100 GHz DWDM
Authors: Thiessen Torrey , Mak Jason C. C. , Coarer Florian Denis-Le , Yong Zheng , Froberger Kevin , Marchenay Marylise , Peyrou Martin , Milord Laurent , Poon Joyce K. S. , Jany Christophe , Menezo Sylvie
Published: May 2023

We demonstrate a 4λx8 output DFB laser comb source with 94GHz channel spacing. The comb source produces approximately 1mW of fiber-coupled power per wavelength per fiber with 2dB power variability across all 32 output channels.
30-Gbps/ch x 4 ch Simultaneous Error-Free Transmission with A Low-Power Transmitter Flip-Chip-Bonded 1.3-µm LD-Array-on-Si
Authors: Kishi Toshiki , Nagatani Munehiko , Kanazawa Shigeru , Shikama Kota , Fujii Takuro , Nishi Hidetaka , Minotani Tadashi , Sato Norio , Segawa Toru , Matsuo Shinji
Published: May 2023

30-Gbps/ch NRZ PRBS-31 x 4 ch simultaneous error-free 1.6-km transmission was achieved with a low-power 4-ch transmitter consisting of 65-nm CMOS cascode shunt LD drivers and flip-chip-bonded LD-array-on-Si, resulting in power efficiency of 1.2 mW/Gbps.
CMOS-Foundry Compatible, Broadband, and Compact Routing of Multimode SOI Waveguides
Authors: Novick Asher , Jang Kaylx , Rizzo Anthony , James Aneek , Dave Utsav , Lipson Michal , Bergman Keren
Published: May 2023

We demonstrate a CMOS-foundry compatible, broadband, and compact platform for routing multimode wavguides. Insertion loss of <0.5dB and modal cross-talk of <-15dB are measured for 90° and 180° R
eff
< 3µm bends supporting over 200nm of bandwidth.
Passive Integrated Athermal (De) Multiplexers on 300 mm Silicon Photonics Wafers
Authors: Gao Yun , Pestana Noah , Deckoff-Jones Skylar , Zheng Jiajiu , Goldstein Jordan , Netherton Andrew , Shiue Ren-Jye , Watts Michael R. , Poulton Christopher V.
Published: May 2023

We demonstrate passive integrated athermal (de)multiplexers showing near 0 pm/°C wavelength shift from 20 to 80 °C on 300 mm silicon photonics wafers. Waferscale data shows its high fabrication tolerance for next-generation optical transceiver systems.
Low-Reflection Ultrahigh-extinction-ratio All-silicon TM-pass Polarizer covering E to U optical communication bands
Authors: Cheng Guanglian , Yi Qiyuan , Yan Zhiwei , Li Qiyuan , Xu Fanglu , Sima Chaotan , Shen Li
Published: May 2023

We design and demonstrate a low-reflection TM-pass polarizer with high polarization extinction ratio > 30 dB over a 260 nm bandwidth. The fabricated polarizer exhibits excess loss < 0.9 dB for 1410-1700 nm wavelength range.
Integrated Comb-Driven Silicon Photonics
Authors: Wang Xingjun , Shen Bitao , Shu Haowen , Chang Lin , Tao Yuansheng , Xie Weiqiang , Bowers John E.
Published: May 2023

We realize the combination of integrated microcomb and silicon photonics, employing the advanced AlGaAsOI optical nonlinear platform and novel SiPh chips. Data link with 2-Tbps aggregate rate and highly reconfigurable radio frequency filter are demonstrated.
Fast (<9.4 µs) Full-C-Band Tuning of Silicon Photonics Double-Ring Filters using Feed-Forward Control
Authors: Konoike Ryotaro , Matsuura Hiroyuki , Suzuki Keijiro , Matsumoto Ryosuke , Ikeda Kazuhiro , Sato Ken-Ichi
Published: May 2023

We demonstrate full-C-band (1530-1565 nm) tuning of narrowband (~20 GHz) silicon ring filters with <9.4 µs optical 60% rise time, which is >25 times faster than step-function control, by adopting inverse-designed feed-forward analog control.
Slim Push-Pull Fiber Array Connector for Optical Chips
Authors: Brusberg Lars , Matthies Jürgen , Grenier Jason R. , Clark Jeffrey S. , Johnson Betsy J. , Terwilliger Chad C.
Published: May 2023

We report connector loss of 0.42 dB for a low-profile fiber-to-chip connector to replace fiber pigtails and enable flip-chip electronic assembly of optical chips for co-packaged optics.
Temperature-tuned two-segment highly-nonlinear fiber with increased stimulated Brillouin scattering threshold
Authors: Guo Cheng , Vasilyev Michael , Akasaka Youichi , Palacharla Paparao , Takasaka Shigehiro , Sugizaki Ryuichi
Published: May 2023

We apply temperature tuning to align zero-dispersion wavelengths of two fiber segments with different Brillouin frequencies. The resulting two-segment highly-nonlinear fiber exhibits 2.1- dB-increased stimulated Brillouin scattering threshold and flattened parametric gain.
P4INC-AOI: When In-Network Computing Meets All-Optical Interconnect for Adaptive and Low-Latency Optical DCN
Authors: Xie Xuexia , Yang Hao , Zhu Zuqing
Published: May 2023

We propose and experimentally demonstrate P4INC-AOI for orchestrating in-network computing and all-optical interconnect in an optical data-center network. Experimental results show that P4INC-AOI reduces job completion time of Hadoop MapReduce jobs by 77.9% on average.
Transmission and Reception of 17×480 Gbit/s PDM-16QAM with Tx/Rx I/Q Imbalance Compensation and Simplified MLSE for Metro-Regional 400G Optical Communications
Authors: Li Fan , Zou Dongdong , Ni Weihao , Chen Zhiwei , Yi Xingwen , Li Zhaohui
Published: May 2023

We experimentally demonstrate a single-carrier 400G Metro/regional communications based on 60-GBaud PDM-16QAM over 430-km SMF-28. Joint GPD and GSOP and 4×4 MIMO LMS equalizer are adopted to compensate Rx/Tx I/Q imbalance, and simplified MLSE with 99.61% computational complexity reduction is employed to mitigate channel bandwidth constraint.
Four-wave mixing mitigation by using waveguide-based 4λ–WDM filters for 800 and 400 GbE
Authors: Yanagihara Ai , Chen Mingchen , Kanazawa Shigeru , Nakanishi Yasuhiko , Nada Masahiro , Taniguchi Hiroki , Suzuki Kenya
Published: May 2023

We report four-wave mixing mitigation by 4λ-WDM filters fabricated by silica-based planar lightwave circuits for 800- and 400-GbE application. The multiplexing filter integrates a simple polarization-alternating structure on arbitrary lanes for the impairment mitigation.
Digital Pre-Distortion Coefficients Identification Using Gauss-Newton Based Direct Learning Architecture
Authors: Jiang Hexun , Fu Mengfan , Zhu Yixiao , Yi Lilin , Hu Weisheng , Zhuge Qunbi
Published: May 2023

We propose to identify the coefficients of a digital pre-distortion equalizer based on direct learning architecture (DLA) using the Gauss-Newton method. Experimental results show that DLA outperforms indirect learning architecture by 0.5dB.
Study of TDEC for 50G-PON Upstream at 50 Gb/s in Negative Dispersion Regime using 25G-class Transceivers
Authors: Caruso Giuseppe , Cano Ivan N. , Talli Giuseppe , Nesset Derek , Gaudino Roberto
Published: May 2023

We evaluate TDEC and Rx sensitivity in a negative dispersion regime with 25G-class DML and EML modulated at 50 Gb/s. Results show that TDEC can effectively predict the performance of both transmitters for 50G-PON upstream.
Pump Optimization of E-band Bismuth-Doped Fiber Amplifier
Authors: Donodin Aleksandr , Manuylovich Egor , Dvoyrin Vladislav , Forysiak Wladek , Turitsyn Sergei K.
Published: May 2023

We experimentally investigate different bi-directional pumping schemes of an E-band bismuth-doped fiber amplifier. Best performance is achieved with 1320nm pumps, and features 38.9dB gain, 4.7dB NF, and 32.6% power conversion efficiency.
First Monolithically-Integrated Silicon CMOS Coherent Optical Receiver
Authors: Movaghar Ghazal , Arrunategui Viviana , Maharry Aaron , Chansky Evan , Liu Junqian , Andrade Hector , Schow Clint , Buckwalter James
Published: May 2023

An O-band coherent optical receiver (CORX) is integrated in a 45-nm mono-lithic CMOS SOI process. The CORX operates to 80 Gbps with FEC-acceptable BER at 1.2 pJ/bit energy efficiency. To our knowledge, this is the first monolithically-integrated Silicon CMOS CORX.
High Power EDFAs for Free Space Communication
Authors: Nicholson J.W. , Grimes A. , Hariharan A. , Sudarshanam V. , Jin C. , Sun I.
Published: May 2023

Progress and performance of high-power EDFAs, in-band pumped by Raman fiber lasers operating at 1480 nm will be reviewed. Applications of these laser systems to free-space communications will be discussed.
Demonstration of Polar Coded Truncated Probabilistic Shaped 64-QAM Transmission over 2000-km G.654E Fiber
Authors: Jia Xiaoshuo , Luo Ming , Li Yan , Yang Chao , Liu Wu , Hong Xiaobin , Guo Hongxiang , Qiu Jifang , Wu Jian
Published: May 2023

In this paper, a polar coded truncated probabilistic shaped 64-QAM (PTPS-64QAM) scheme is proposed and investigated over the G.654E fiber. Results show that about 2000-km transmission could be achieved aided by the novel proposed scheme.
Uncooled High Speed Ge/Si Avalanche Photodiode for 50 Gbit/s-PON with 60 km Reach
Authors: Potet Jérémy , Simon Gaël , Gaillard Georges , Dessemond Camille , Saliou Fabienne , Gay Mathilde , Chanclou Philippe , Thual Monique
Published: May 2023

A high-speed germanium on silicon APD is demonstrated for DSP-free 50G-PONs. Sensitivities of -24 dBm at 58.2 Gbit/s and -26.5 dBm at 50 Gbit/s over 60 km of fiber are experimentally obtained in real time with temperature from -40°C to 80°C.
100G FSO Transmission Using 3-Bit DAC and Self-Coherent Detection
Authors: Patel Romil K. , Domingues Guilherme A. , Muga Nelson J. , Pinto Armando N. , Fernandes Marco A. , Fernandes Gil M. , Monteiro Paulo P. , Guiomar Fernando P.
Published: May 2023

Using a virtual-carrier-assisted self-coherent system aided by a digital resolution enhancement technique, we experimentally demonstrate 100 Gbps FSO transmission over an out-door 42 m link, supported by a single photoreceiver and a simplified transmitter with a 3-bit DAC.
Lightweight Light-Diffusing Fiber Transmitter Equipped Unmanned-Aerial-Vehicle (UAV) for Large Field-of-View (FOV) Optical Wireless Communication
Authors: Chang Yun-Han , Tsai Deng-Cheng , Chow Chi-Wai , Wang Chih-Chun , Tsai Shang-Yen , Liu Yang , Yeh Chien-Hung
Published: May 2023

We propose a light-diffusing-fiber transmitter (LDF-Tx) equipped unmanned-aerial-vehicle (UAV) for optical-wireless-communication (OWC). Long-short-term-memory-neural-network (LSTMNN) provides efficient rolling-shutter-pattern decoding at 360° around LDF-Tx circumference.
First Demonstration of 512-Color Shift Keying Signal Demodulation Using Neural Equalization for Optical Camera Communication
Authors: Onodera Yukito , Hisano Daisuke , Maruta Kazuki , Nakayama Yu
Published: May 2023

This paper experimentally demonstrates 512 color shift keying (CSK) signal transmission for optical camera communication (OCC). We achieved error-free operation with a CMOS image sensor module and a multi-label classification neural network-based equalizer.
Open quantum channel stabilization for twin-field quantum key distribution
Authors: Zhou Lai , Lin Jinping , Jing Yumang , Yuan Zhiliang
Published: May 2023

We develop a novel technique to stabilize an open channel without using frequency dissemination for twin-field quantum key distribution. A versatile setup is demonstrated at a distance of 615.6 km, achieving the repeater-like behaviour.
Enhancing the Quantum Correlation of Biphotons via Coherent Energy Redistribution
Authors: Crockett Benjamin , Montaut Nicola , van Howe James , Roztocki Piotr , Liu Yang , Helsten Robin , Zhao Wei , Morandotti Roberto , Azaña José
Published: May 2023

Towards meeting the strict demands of practical quantum networks, we leverage coherent energy redistribution for noise-tolerant quantum signal processing. We demonstrate the enhancement of noisy biphoton coincidence-to-accidental ratios by up to 3.8 times.
280 Gbit/s PAM-4 Ge/Si Electro-absorption Modulator with 3-dB Bandwidth beyond 110 GHz
Authors: Hu Xiao , Wu Dingyi , Chen Daigao , Liu Ye , Zhang Hongguang , Liu Yang , Liu Jia , Liu Min , Xu Lu , Wang Lei , Xiao Xi , Yu Shaohua
Published: May 2023

We developed a Ge/Si electro-absorption modulator with a record-high 3-dB bandwidth beyond 110 GHz. 224, 240 and 280 Gbit/s PAM-4 eye diagrams with the TDECQ of 1.79, 2.35 and 3.33 dB are experimentally obtained, respectively.
Randomly Coupled 19-Core Multi-Core Fiber with Standard Cladding Diameter
Authors: Rademacher Georg , van den Hout Menno , Luís Ruben S. , Puttnam Benjamin J. , Di Sciullo Giammarco , Hayashi Tetsuya , Inoue Ayumi , Nagashima Takuji , Gross Simon , Ross-Adams Andrew , Withford Michael J. , Sakaguchi Jun , Antonelli Cristian , Okonkwo Chigo , Furukawa Hideaki
Published: May 2023

We developed a randomly-coupled 19-core fiber with standard 125-µm cladding diameter with spatial mode dispersion of
10.8ps/km, enabling a data rate of 1.7 Pb/s, the highest reported amongst optical fibers with standard cladding diameter.
Transparent Relay and Switching of THz-wave Signals in 285-GHz Band Using Photonic Technology
Authors: Dat Pham Tien , Yamaguchi Yuya , Inagaki Keizo , Takano Shingo , Hirata Shotaro , Ichikawa Junichiro , Shimizu Ryo , Morohashi Isao , Yoshida Yuki , Kanno Atsushi , Yamamoto Naokatsu , Kawanishi Tetsuya , Akahane Kouichi
Published: May 2023

A novel system for transparent relaying and switching of terahertz (THz)-wave signals is demonstrated using a low-loss optical modulator and ultra-fast tunable laser. A 32-Gb/s OFDM signal was transmitted over a switchable fiber–THz–fiber–THz system in the 285-GHz band.
Net 1.6 Tbps O-band Coherent Transmission over 10 km Using a TFLN IQM and DFB Lasers for Carrier and LO
Authors: Berikaa Essam , Alam Md Samiul , Bernal Santiago , Li Weijia , Krueger Benjamin , Pittalà Fabio , Plant David V.
Published: May 2023

We report the first 1.6 Tbps, O-band, 10 km coherent transmission system using DFB lasers for both carrier and LO, and a TFLN IQ modulator, operating at 167 Gbuad DP-64QAM under the 25% SD-FEC threshold.
273.6 Tb/s Transmission Over 1001 km of 15-Mode Fiber Using 16-QAM C-Band Signals
Authors: van den Hout Menno , Di Sciullo Giammarco , Rademacher Georg , Luís Ruben S. , Puttnam Benjamin J. , Fontaine Nicolas K. , Ryf Roland , Chen Haoshuo , Mazur Mikael , Neilson David T. , Sillard Pierre , Achten Frank , Sakaguchi Jun , Antonelli Cristian , Okonkwo Chigo , Furukawa Hideaki
Published: May 2023

We transmit 15×184×24.5 GBd PDM-16-QAM signals, spanning the full C-band, over 1001 km of 15-mode fiber. The resulting net data rate of 273.6 Tb/s is the highest reported in long-distance multi-mode fiber transmission.
1Tb/s and 800 Gb/s real-time transmission at 138 GBd over a deployed ROADM network with live traffic
Authors: Richter Thomas , Searcy Steven , Jennevé Philippe , Giannakopoulos Dimitrios , Owens Bill , Mestre Miquel A. , Awadalla Ahmed , Tibuleac Sorin
Published: May 2023

We demonstrate real-time transmission using a single-carrier coherent pluggable at 138-GBd in a deployed network. We show 800 Gb/s over a record 2220 km and over 1422 km with 24 WSSs, and a record 1 Tb/s over 869 km.
First Real-time Demonstration of 200G TFDMA Coherent PON using Ultra-simple ONUs
Authors: Xing Zhenping , Zhang Kuo , Chen Xi , Feng Qiguang , Zheng Keshuang , Zhao Yijia , Dong Zhen , Zhou Ji , Gui Tao , Ye Zhicheng , Li Liangchuan
Published: May 2023

We demonstrate the first real-time TFDMA coherent PON system with single-DAC and single-ADC ONUs, which can support up to 256 end users, and peak line rates of 100/200 Gb/s in the upstream/downstream, respectively.
EAM-integrated DBR-LD with 16-channel and 100-Gbps/λ PAM-4 modulation
Authors: Park Su Ik , Kwon Oh Kee , Lee Chul Wook , Kim Ki Soo , Park Kyung Su , Jin Jae Hyun , Kim Jung Hoon , Shim Jong In
Published: May 2023

An EAM-integrated DBR-LD is reported using a novel waveguide structure for efficient wavelength tuning, and a 16-channel 100-Gbps/λ PAM-4 operation with a grid of 150 GHz near 1290 nm are achieved successfully.
Optimal Channel Spacing for Next-Gen WDM Networking with 800ZR+ Elastic Optical Transponders
Authors: Zami Thierry , Rossi Nicola , Lavigne Bruno
Published: May 2023

By foreseeing an evolution from 800ZR to 800ZR+, like 400ZR+ just after 400ZR, we evaluate how WDM networks benefit from these 800ZR+ interfaces depending on their traffic and on their quality of wavelength routing equipment
On the Road to 1-Pbps systems: Experimental Demonstration of an Energy Efficient 500-Tbps Transatlantic Cable with 200-μm Outer Diameter Fibers
Authors: Meseguer Alexis Carbó , Zambrano Andrea Quintana , Antona Jean-Christophe , Esparza Juan Uriel , de Araujo Juliana Tiburcio , Courtois Olivier , Letellier Vincent
Published: May 2023

We experimentally emulate an energy efficient 500-Tbps subsea cable with 24 fiber pairs of 200-μm outer diameter Pure Silica Core Fiber and then we draw projections to assess how to achieve a 1-Pbps submarine cable for distances from 3000 to 12000 km.
Constellation Independent Look-up Table Enabled Digital Predistortion for Digital-Analog Radio-over-Fiber System
Authors: Zeng Xiaobo , Zhu Yixiao , Xu Yicheng , Fu Mengfan , Jiang Hexun , Yi Lilin , Hu Weisheng , Zhuge Qunbi
Published: May 2023

A constellation independent look-up table (LUT) method for transceiver nonlinearity predistortion in digital-analog radio-over-fiber system is proposed and experimentally demonstrated, achieving a SNR gain of 1.04dB. The table size can be reduced to 0.3% of the conventional LUT.
200 Gbit/s Transmitter Based on a Spin-on Ferroelectric Waveguide Modulator
Authors: Yokoyama Shiyoshi , Mao Jiawei , Uemura Futa , Sato Hiromu , Lu Guo-Wei
Published: May 2023

We demonstrate a 200 Gbit/s PAM4 transmitter using a ferroelectric waveguide Mach-Zehnder modulator. It has BER below FEC threshold, drive voltage of 1.3 Vpp, and possible reliable operation.
High-Performance EO Polymer/Si and InP Nano-Hybrid Optical Modulators in O-band and C-band Wavelengths
Authors: Fujikata Junichi , Sato Hiromu , Bannaron Alisa , Lu Guo-Wei , Yokoyama Shiyoshi
Published: May 2023

We present high-efficiency of 0.18Vcm and 252Gbps of PAM-4 high-speed operation for EO polymer/Si and InP hybrid optical modulators in C-band wavelengths. We also demonstrate record high-efficiency of 0.35Vcm and high-speed operation in O-band wavelengths.
Heuristic-assisted Deep Reinforcement Learning for Resource-efficient and QoS-guaranteed 5G RAN Slice Migration in Elastic Metro Aggregation Optical Networks
Authors: Gu Jiahua , Zhu Min , Wang Yunwu , Cai Xiaofeng , Cai Yuancheng , Zhang Jiao
Published: May 2023

We propose a heuristic-assisted deep reinforcement learning framework for resource-efficient and QoS-guaranteed 5G RAN slice migration in EONs, which can optimize the spectrum resource consumption, traffic migration, and power consumption, simultaneously.
Disaggregated Optical Network Orchestration based on the Physical Layer Digital Twin
Authors: Borraccini Giacomo , Ambrosone Renato , Giorgetti Alessio , Straullu Stefano , Aquilino Francesco , Virgillito Emanuele , D’Amico Andrea , D’Ingillo Rocco , Sambo Nicola , Cugini Filippo , Curri Vittorio
Published: May 2023

The architecture and functionality of an open and disaggregated optical network is presented, focusing on the orchestration of the physical layer digital twin and the opti-cal network controller, implemented on an experimental multi-vendor triangular-topology setup.
Dynamic bypass of wavelength switching in SDN-enabled WDM VNTs over SDM Networks with high bit-rate optical channels
Authors: Muñoz R. , Manso C. , Balasis F. , Soma D. , Beppu S. , Casellas R. , Gifre Ll. , Vilalta R. , Martínez R. , Yoshikane N. , Tsuritani T.
Published: May 2023

We experimentally demonstrate an SDN architecture for WDM VNTs to offload pass-through high bit-rate optical channels from overloaded ROADMs by provisioning spatial channels between the source and destination ROADM’s add-drop stages, and rerouting the optical channels.
Technologies for Optical Submarine Cables: Past Present & Future
Authors: Nakamura Yuichi , Takeshita Hitoshi
Published: May 2023

Optical submarine cables are critical infrastructures that carry more than 80% of the Internet traffic between continents. An overview of the technology used in past and present optical submarine cables is presented.
Fiber-To-The-Room (FTTR): Standards and Deployments
Authors: Wu Xuming , Zeng Yan , Si Xiaoshu , Wang Xiang , Liu Xiang
Published: May 2023

We review recent advances in the field deployment of fiber-to-the-room (FTTR) systems for Gigabit/s home networking and in the global standardization of the FTTR solution. A novel centralized Wi-Fi access network (C-WAN) architecture is described.
Cost/Bit Scaling Opportunities in Submarine Cables
Authors: Mateo Eduardo F.
Published: May 2023

The cost/bit of submarine networks has experienced enormous reductions in the past three decades. This decline starts to show signs of fatigue. This paper analyzes the causes and discusses opportunities to address this saturation.
Surface and Underwater Surveillance based on Highly Sensitive Distributed Fiber-optic Hydrophone
Authors: Chen Junfeng , Ai Ke , Li Hao , Xiao Xiangpeng , Fan Cunzheng , Yan Zhijun , Sun Qizhen
Published: May 2023

We report field test results of surface and underwater surveillance based on fiber-optic distributed acoustic sensing (DAS) and highly sensitive distributed fiber-optic hydrophone (DFOH). Various intrusive targets like boat, frogman and etc. are detected.
Visible Wavelength PICs for Fluorescent Microscopy and Flow Cytometry
Authors: Mashayekh Alireza Tabatabaei , Merget Florian , Buscher Martin , Klos Thomas , Spehr Marc , Geuzebroek Douwe , Witzens Jeremy
Published: May 2023

We present two multi-color laser engines for fluorescent confocal microscopy and polychromatic flow cytometry implemented in silicon nitride PICs. Besides miniaturization, PICs facilitate structured illumination, used here to distinguish fluorescent signals by excitation wavelength.
Parallel Extension of High-Speed Analog-Circuit FIR Equalizer for Low-Latency Optical Transceiver/Receiver
Authors: Otsuka Shuhei , Koguchi Ryo , Sakamoto Takahide
Published: May 2023

We experimentally demonstrate parallel extension of analog FIR equalizer. By a dual parallel extended configuration, an 18-tap FIR filter with an 18-ps tap delay is constructed, which adaptively equalizes real-time 11.1-Gbaud NRZ signals.
Preemphasis-Aware Semiconductor Optical Amplifier Model
Authors: Hafermann Hartmut , Zhao Xiaohui , Yu Shuqi , Frignac Yann
Published: May 2023

A preemphasis-aware model for SOAs with non-flat WDM inputs yielding a root-mean-square error of less than 0.05 dB is presented. It outperforms generic neural-network models while using a fraction of the training data.
Pilot-Aided Continuous Digital Signal Processing for Multiformat Flexible Coherent TDM-PON in Downstream
Authors: Li Guoqiang , Yan An , Xing Sizhe , Li Zhongya , Shen Wangwei , Wang Jiaye , Zhang Junwen , Chi Nan
Published: May 2023

To avoid burst-signal processing in downstream transmission during modulation-format switching, we propose and experimentally demonstrate a pilot-aided DSP scheme with continuous SOP tracking, carrier-phase recovery, and channel estimation in 300G flexible CPON based on 4/16/64-QAMs.
Low-Cost 100G Coherent PON Enabled by TFDM Digital Subchannels and Optical Injection Locking
Authors: Zhang Haipeng , Jia Zhensheng , Campos Luis Alberto , Knittle Curtis
Published: May 2023

We demonstrate a novel 100G TFDM coherent PON architecture featuring low-cost ECL-free ONU enabled by remote optical carrier delivery through injection locking. System performance shows no degradation compared to a regular ECL based system.
Demonstration of Beyond 100G Three-Dimensional Flexible Coherent PON in Downstream with Time, Frequency and Power Resource Allocation Capability
Authors: Shen Wangwei , Xing Sizhe , Li Guoqiang , Li Zhongya , Yan An , Wang Jiaye , Zhang Junwen , Chi Nan
Published: May 2023

We propose and demonstrate a novel three-dimensional flexible coherent PON with the resource-allocation capability in time, frequency and power domain. High flexibility is demonstrated with >100G over 20-km fiber for coherent PON in downstream.
Geophysical Applications of ϕ-OTDR/DAS
Authors: Lindsey Nathaniel J.
Published: May 2023

ϕ-OTDR/DAS enables dense, long-range (1 - 200 km), array recordings of strain fields with exceptional sensitivity ( < 1 × 10-9 strain) wherever optical fiber exists. The measurement is conventionally based on interferometrically extracting dynamic phase information of the Rayleigh backscattered light from one end of a single-mode fiber. Recently, ϕ-OTDR/DAS has expanded into telecommunications networking, seismology and geophysics, water infrastructure monitoring, and civil engineering.
Supporting Bandwidth Guarantee for a Fast Optical Switching Network with Micro Buffer Switching Fabric
Authors: Yan Fulong , Xie Chongjin , Calabretta Nicola
Published: May 2023

We propose a micro buffer fast optical switch (MFOS) fabric for a data center network. MFOS highly improves the network performance, and achieves 6.7 µs latency and 99.9% throughput at a load of 0.8.
Degradation Detection and Severity Estimation by Exploiting an Optical Time and Frequency Digital Twin
Authors: Devigili M. , Ruiz M. , Barzegar S. , Costa N. , Napoli A. , Pedro J. , Velasco L.
Published: May 2023

We exploit the intrinsic advantages of a time and frequency domain digital twin to detect degradations and to estimate their severity. Noticeable performance shown for filter failures confirms the usefulness of this approach.
DFE and BCJR Performance with SD FEC in 112 GBd PAM4 IMDD Systems
Authors: Stojanović Nebojša , Youxi Lin , Rahman Talha , Calabrò Stefano
Published: May 2023

Soft information quality of different DSP schemes followed by hybrid soft/hard decision FEC is investigated. We demonstrate in simulations and experiments that BCJR achieves a significant gain over DFE by providing better soft information.
Optical Multipath Interference Mitigation for PAM4 Transmission Using Line Coding and High-pass Filtering
Authors: Cheng Ning , Zhang Dechao , Ge Dawei , Song Yan , Lv Meijuan , Li Shanglin , Lv Bin , Zheng Xuezhe
Published: May 2023

A simple method using DC-balanced line-coding and receiver-side high-pass filtering is proposed to mitigate MPI in high-speed PAM4 transmission. 5-dB improvement in MPI tolerance is achieved in both simulations and experiments for 25GBd PAM4 transmissions.
Phase-preserving amplitude regeneration in a Mamyshev regenerator with mid-stage optical phase conjugation
Authors: Guo Cheng , Vasilyev Michael
Published: May 2023

We experimentally demonstrate phase-preserving amplitude regeneration of an RZ-QPSK signal by placing an optical phase conjugator between two Mamyshev regenerators, improving intensity noise 2.8 times, Q-factor by 2.4 dB and EVM by 4.0%.
Experimental Demonstration of Reconfigurable “Digital Average” of Two 20-Gbaud Phase-Encoded Data Channels Using Nonlinear Optical Wave Mixing
Authors: Minoofar Amir , Song Hao , Almaiman Ahmed , Karapetyan Narek , Ko Wing , Zou Kaiheng , Zhou Huibin , Ramakrishnan Muralekrishnan , Annavaram Murale , Habif Jonathan L. , Tur Moshe , Willner Alan E.
Published: May 2023

We experimentally demonstrate the reconfigurable “digital average” of two 10/20-Gbaud phase-encoded data channels using two nonlinear optical stages. In the first nonlinear stage, we compute the average. In the second nonlinear stage, we multicast the average result to the input signals wavelengths.
Impact of Spatial Variations on Splitter-Tree-Based Integrated Optical Phased Arrays
Authors: Zhang Zhengxing , Notaros Milica , Gao Zhengqi , Chakraborty Uttara , Notaros Jelena , Boning Duane S.
Published: May 2023

We consider the impact of spatially correlated geometric variations on splitter-tree-based integrated optical phased arrays. These variations can substantially affect the emitted beam. Our analysis is shown to be consistent with experimental results.
Controllable Passive Multi-polarization-states Generator based on Silicon Photonics for Quantum Communication
Authors: Kim Kap-Joong , Lim Kyongchun , Choi Byung-Seok , Lee Wook-Jae , Ko Young-Ho , Choe Joong-Seon , Kim Minchul , You Jong-Bum , Youn Chun Ju
Published: May 2023

We demonstrate a silicon-based controllable multi-polarization-states generator for quantum key distribution. Our device can effectively generate various sets of well-defined four-polarization states using the thermo-optics effect and combine them into one port at a telecom-wavelength.
208km ultra-long single span hybrid BOTDR and Φ-OTDR with ROPA technology
Authors: Liu Jiasheng , Li Ming , Xu Jian , Yu Jiekui , Nie Mingchao , Zhang Shiyu , Chen Xingyun , He Guoliang , Sun Shujuan , Tan Man , Hu Qianggao
Published: May 2023

Ultra-long single span hybrid BOTDR and Φ-OTDR system with ROPA technology is proposed. Using double heterodyne detection configuration, high order Raman amplifiers, cascaded RGUs, 208km unrepeatered real time simultaneous temperature and vibration measurement is achieved.
Optoelectronic oscillator based on SBS-assisted parity-time symmetry
Authors: Wang Lin , Liu Yifan , Yu Yuan , Zhang Xinliang
Published: May 2023

A parity-time symmetric optoelectronic oscillator is constructed based on stimulated Brillouin scattering. A stable microwave signal at 9.66 GHz is generated with a phase noise of −103.9 dBc/Hz at an offset frequency of 10 kHz.
Deep Learning-Based End-to-End Bit-Wise Autoencoder for G-Band Fiber-Terahertz Integrated DFT-S-OFDM Communication System
Authors: Li Zhongya , Huang Changle , Jia Junlian , Li Guoqiang , Shen Wangwei , Shi Jianyang , Li Ziwei , Shen Chao , Zhang Junwen , Chi Nan
Published: May 2023

We proposed and experimentally demonstrated a bit-wise end-to-end deep-learning-based autoencoder for a fiber-THz integrated DFT-S-OFDM communication system at 209 GHz. More than 5.5-dB sensitivity gain is achieved compared with traditional DFT-S-OFDM system at 50Gbps.
Multimode Fiber Bandwidth Uniformity and its Impact on Optical links in Hyperscale Datacenters
Authors: Chen Qin , Lu Rui , Wang Peng , Xie Chongjin
Published: May 2023

We characterize multimode fiber bandwidth uniformity and its impact on optical links in data centers, discussing the importance of MMF bandwidth uniformity to data center deployment of the next-generation 100-Gb/s multimode products.
Nonlinear Impairment Scaling in Few-Mode Fiber Transmission Systems with Mode Permutation Technique
Authors: Xing Rui , Ji Xiaofan , Liu Yaping , Yang Zhiqun , Huang Zhanhua , Zhang Lin
Published: May 2023

Few-mode fiber transmission systems with three states of the permutation strategies are evaluated using a GN model with MDL considered, for the first time. CMP strategy outperforms by 0.3 dB in terms of SNR difference among modes with an MDL of 0.1 dB/km.
Reliable and Low-complexity Multiple Performance Parameters Prediction for Optical Network Equipment
Authors: Chen Yu , Wang Danshi , Zhang Chunyu , Ye Bing , Jia Yinqiu , Li Jin , Zhang Min
Published: May 2023

A multi-objective and multi-step performance parameters prediction scheme based on SCINet for optical network equipment is proposed. It not only saves 83.96% of training time on average, but also has high reliability.
Modulator-free intensity- and phase-modulated optical transmitter for quantum communications
Authors: Woodward R. I. , Lo Y. S. , Walk N. , Lucamarini M. , De Marco I. , Paraïso T. K. , Pittaluga M. , Roger T. , Sanzaro M. , Yuan Z. L. , Shields A. J.
Published: May 2023

We demonstrate a simplified optical transmitter design for generating intensity-and phase-modulated pulses, using injection locking and pulse interference. The transmitter is applied for proof-of-principle quantum key distribution, achieving Mbps secure bit rates.
Second-Order Temporal Interference with Thermal Light: Interference beyond the Coherence Time
Authors: Ihn Yong Sup , Kim Yosep , Tamma Vincenzo , Kim Yoon-Ho
Published: May 2023

We report observation of a counter-intuitive phenomenon in multi-path correlation interferometry with thermal light. The intensity correlation between the outputs of two unbalanced Mach-Zehnder interferometers (UMZI) with two classically correlated beams of thermal light at the input exhibits genuine second-order interference with the visibility of 1/3. Surprisingly, the second-order inter- ference does not degrade at all no matter how much the path length difference in each UMZI is increased beyond the coherence length of the thermal light. Moreover, the second-order interference is dependent on the difference of the UMZI phases. These results differ substantially from those of the entangled-photon Franson interferometer which exhibits two-photon interference dependent on the sum of the UMZI phases and the interference vanishes as the path length difference in each UMZI exceeds the coherence length of the pump laser. Our work offers deeper insight into the interplay between interference and coherence in multi-photon interferometry.
3.2Tb/s Heterogeneous Photonic Integrated Circuit Chip in a Co-Packaged Optics Configuration
Authors: Lambert Damien , Rahn Jeff , Sodagar Majid , Askari Murtaza , Apiratikul Paveen , Spann John , Pham Thang , Huang Yishen , Krasulick Stephen
Published: May 2023

We present a low-cost, scalable 3.2Tbps heterogenous photonic integrated circuit chip assembled in a co-packaged optics configuration. The integration of III-V material directly into the Silicon-Photonic chip offers clear form-factor, density, and thermal dissipation advantages.
Experimental Demonstration of a Simplified SOA Nonlinearity Mitigation scheme
Authors: Sillekens Eric , Ferreira Filipe M. , Killey Robert I. , Bayvel Polina
Published: May 2023

We experimentally demonstrated a digital learned-filter mitigation scheme for semiconductor optical amplifier-induced nonlinear distortion of single-polarisation 32 GBd 16QAM and 64QAM signals in a back-to-back configuration.
VCSEL Based Neuromorphic Computing
Authors: Newns Dafydd Owen , Hejda Matej , Robertson Joshua , Hurtado Antonio
Published: May 2023

We report on Vertical-Cavity Surface-Emitting Lasers (VCSELs) for high-speed and energy-efficiency systems for photonic neuromorphic computing, yielding excellent performance in complex processing tasks whilst benefitting from hardware-friendly implementations and full compatibility with optical communication technologies.
Chaotic-Cavity Surface-Emitting Lasers for Optical Wireless Communication
Authors: Alkhazragi Omar , Dong Ming , Chen Liang , Liang Dong , Ng Tien Khee , Zhang Junping , Bagci Hakan , Ooi Boon S.
Published: May 2023

We demonstrated using chaotic cavities to lower the spatial coherence of vertical-cavity surface-emitting lasers. Our design achieved a 10-Gb/s data rate with a 60% increase in the optical power and double the number of modes.
Broadband and Fine-resolution Microwave Photonic Filtering with High-Speed Electronic Reconfigurability
Authors: Zhu Xinyi , Crockett Benjamin , Rowe Connor M. L. , Azaña José
Published: May 2023

We experimentally demonstrate electronically programmable, user-defined time-varying frequency filtering of continuous broadband signals, over a 22 GHz frequency tuning range and with >1 GHz reconfiguration speed, using electro-optic modulation of a reversible time-mapped spectrogram.
Nonlinear Tolerant Conjugated RoF System Secured by Physical Layer Encryption with Deliberate Signal Randomization
Authors: Ishijima Tatsuki , Otsuka Shuhei , Harada Shun , Sakamoto Takahide , Tanizawa Ken , Futami Fumio
Published: May 2023

We propose and demonstrate conjugated RoF (C-RoF) secured by physical layer encryption with deliberate signal randomization, for high-RF-link-gain and high-security analog RoF transmission. 19.4-dBm high-power secured C-RoF-QPSK is experimentally achieved with improved fiber nonlinearity tolerance.
Hybrid distributed acoustic sensing and Kramers–Kronig communication system over a two-mode fiber
Authors: Marin Juan M. , Briantcev Dmitrii , Kang Chun Hong , Alkhazragi Omar , Ng Tien Khee , Ashry Islam , Trichili Abderrahmen , Ooi Boon S.
Published: May 2023

We report on the co-propagation of distributed acoustic sensing (DAS) and Kramers–Kronig communication scheme over a two-mode fiber, achieving DAS with a signal-to-noise ratio larger than 2 dB and gross data rate of 2.04 Gbps.
Birefringent and low loss semi-tube hollow-core fiber
Authors: Wang Yingying , Hong Yifeng , Gao Shoufei , Lu Xiaosong , Zhang Zhe , Ding Wei
Published: May 2023

We summarize our recent work on design, fabrication and characterization of birefringent, low loss and broadband semi-tube hollow-core anti-resonant fiber. We also show its low loss interconnection with panda fiber.
Near-zero Radiation Induced Attenuation in Nested Anti-resonant Nodeless Hollow-core Fibers at 1550 nm
Authors: Medaer Sacha E. R. , Di Francesca Diego , Fokoua Eric Numkam , Poletti Francesco , Ricci Daniel , Schmauss Bernhard , Taranta Austin , Toccafondo Iacopo
Published: May 2023

The first nested anti-resonant hollow-core fiber radiation study is reported. A record near-zero radiation induced attenuation is observed under γ-rays and X-rays. These results open new possibilities for fiber-based applications in radiation environments.
Comparison between PAM and DMT in a 200-Gb/s IM-DD System Considering the Interaction between Bandwidth Limit and Peak Power Constraint at Transmitter
Authors: Che Di
Published: May 2023

We revisit the PAM vs DMT debate in a 200G-class IM-DD system. Distinguished from previous works, we study the interaction between bandwidth limit and peak power constraint in an IM transmitter with peak distortion, and involve DSP techniques like faster than Nyquist and entropy loading for a more comprehensive achievable information rate comparison.
Performance Evaluation of Low-Complexity Channel-Polarized Multilevel Coded 146-Gbaud PDM Probabilistically Shaped 16QAM over 101-km Transmission
Authors: Kakizaki Takeshi , Nakamura Masanori , Hamaoka Fukutaro , Kisaka Yoshiaki
Published: May 2023

We experimentally show that low-complexity channel-polarized multilevel coding enables up to 74% decoding-complexity reduction compared to concatenated codes over a 101-km 146-Gbaud probabilistically shaped 16QAM signal transmission.