bluuebunny/crossref_metadata_2025 huggingface dataset:
Adaptive loading for water-air SIMO OWC system based on the temporal and spatial properties of waves
Authors: Shao Yingjie , Di Yujie , Chen Lian-Kuan
Published: October 2021

We demonstrated a proactive adaptive loading scheme for air-water SIMO OWC systems through waves based on the prediction of wave characteristics. A maximum of 96.2% increase in throughput is realized by temporal and spatial diversities.
Silicon Photonics Coherent Optical Subassembly for High-Data-Rate Signal Transmissions
Authors: Yamanaka Shogo , Nasu Yusuke
Published: October 2021

We present silicon photonics coherent optical subassemblies for digital coherent optical systems. We also demonstrate up to 96-Gbaud 16QAM transmission experiments.
Silicon Photonic Switch-Enabled Server Regrouping Using Bandwidth Steering for Distributed Deep Learning Training
Authors: Zhu Ziyi , Yan Shijia , Glick Madeleine Strom , Teh Min Yee , Bergman Keren
Published: October 2021

We demonstrate SiP switch-enabled server regrouping using bandwidth steering for performance improvement in distributed deep learning training in a Fat-tree testbed. Our proposed SiP switch control scheme enables scaling to large-scale datacenter and HPC systems.
Wavelength Collision-Free and Low-Loss Full-Duplex Transmission over Switchable Full-Coupling or Half-Split Coherent WDM-PON System with Shared Protection
Authors: Kodama Takahiro , Goto Tetsuji , Matsumoto Ryosuke
Published: October 2021

We propose low-loss and high-tolerance shared protection for full-duplex coherent wavelength division multiplexing-passive optical network systems, achieving < 2 dB penalty with small back reflection in wavelength collision-free secondary link transmissions with primary link failure.
Direct Modulation of Membrane Distributed Reflector Lasers using Optical Feedback
Authors: Matsuo Shinji , Diamantopoulos Nikolaos-Panteleimon , Yamaoka Suguru , Nishi Hidetaka
Published: October 2021

We have developed directly modulated membrane distributed reflector lasers using optical feedback from a DBR or an external waveguide. High-speed modulation with low power consumption is achieved due to photon-photon resonance and detuned loading effects.
Challenges and Opportunities of Directly Modulated Lasers in Future Data Center and 5G Networks
Authors: Sudo Tsurugi , Matsui Yasuhiro , Carey Glen , Verma Ashish , Wang Ding , Lowalekar Viral , Kwakernaak Martin , Khan Ferdous , Dalida Nicholas , Patel Ronak , Nickel Alexander , Young Bruce , Zeng Jimmy , Ha Yuk Lung , Roxlo Charles
Published: October 2021

This talk aims to share a product development team’s perspective on the maturity of the foundations of high-speed DMLs today and confidence in productizing DMLs for 100 Gb/s per wavelength and beyond tomorrow.
High-performance polarization-handling devices on silicon
Authors: Dai Daoxin , Zhu Zhuoning
Published: October 2021

Recent progresses for high-performance polarization-handling components on silicon are reported, including polarization-selective silicon photonic devices as well as photonic devices working with dual polarizations, which are very useful for various optical systems.
Demonstration of an Integrated Photonic Magic T – a Robust Beam Splitter and Novel Polarization Diversity Building Block
Authors: Singh Manuj , Fargas Cabanillas Josep M. , Gluhović Dorde , Zhang Bohan , Popović Miloš A.
Published: October 2021

We demonstrate an adiabatic magic T in a 45 nm CMOS photonics foundry platform, with 3±0.25 dB power splitting and <1.2 dB loss over 1530-1600 nm, with a 60 µm-long device. It functions as a 2×2 beam splitter with splitting ratio from both input ports fundamentally robust by symmetry, and supports novel polarization diversity and modulator designs.
Ultra-compact and broadband 3-dB power splitter based on subwavelength grating at 2-μm
Authors: Wang Zelu , Liu Yingjie , Wang Shuai , Liu Yilin , Du Jiangbing , Song Qinghai , Xu Ke
Published: October 2021

We demonstrate a 3-dB power splitter based on subwavelength grating waveguides. The devices footprint is only 3 μm ×2 μm. The insertion loss is < 0.3 dB and the bandwidth exceeds 55 nm at 2-μm waveband.
60Gb/s waveguide-coupled O-band GeSi quantum-confined Stark effect electro-absorption modulator
Authors: Srinivasan S. A. , Porret C. , Balakrishnan S. , Ban Y. , Loo R. , Verheyen P. , Van Campenhout J. , Pantouvaki M.
Published: October 2021

We report O-band GeSi quantum-confined Stark effect waveguide-coupled electro- absorption modulator with 50GHz bandwidth. Static extinction ratio of 5.2dB, insertion loss of 7.6dB and 60Gb/s NRZ-OOK operation are shown for a 2V swing.
DAC-Less PAM-4 Slow-Light Silicon Photonic Modulator Assisted by Coupled Bragg Grating Resonators
Authors: Jafari Omid , Zhalehpour Sasan , Shi Wei , LaRochelle Sophie
Published: October 2021

We report a slow-light all-silicon modulator with two segmented electrodes that enables high-speed-PAM operations and simultaneously meets all requirements of high bandwidth (>40GHz), power-efficient operation (73fJ/bit), compact footprint (L
SL-MZM
=570μm), and wide operating wavelength range (Δλ=2nm).
25-Gbit/s 100-km Transmission using 1358-nm-wavelength SOA Assisted Extended Reach EADFB Laser (AXEL) for 25 Gbit/s-class PON
Authors: Shindo Takahiko , Kanazawa Shigeru , Nakanishi Yasuhiko , Chen Mingchen , Nada Masahiro , Yoshimatsu Toshihide , Kanda Atsushi , Nakamura Hirotaka , Sano Kimikazu
Published: October 2021

25-Gbit/s non-return-to-zero (NRZ) transmissions were successfully extended to 100 km by using a 1358-nm-wavelength SOA integrated EADFB laser (AXEL) with an optical modulation amplitude (OMA) over 10.5 dBm.
4-channel E-band data transmission over 160 km of SMF-28 using a bismuth-doped fibre amplifier
Authors: Donodin Aleksandr , Dvoyrin Vladislav , Manuylovich Egor , Phillips Ian , Forysiak Wladek , Melkumov Mikhail , Mashinsky Valery , Turitsyn Sergei
Published: October 2021

We experimentally demonstrate transmission of four 10 Gbit/s NRZ channels in the E-band over 160 km of SMF-28 using a bismuth-doped fibre amplifier with 32 dB maximum gain and 5 dB minimum NF.
Giant Brillouin Amplification in Gas Using Hollow-core Fiber
Authors: Thévenaz Luc , Yang Fan , Gyger Flavien
Published: October 2021

Optical amplification in hollow core fibers has been achieved using stimulated Brillouin scattering directly in the gaseous medium. More than 50 dB optical gain is observed over 50 m of fiber using 200 mW of pump power.
A Dynamic Time-Evolution Control Method to Improve the Performance of Optoelectronic Coherent Ising Machine
Authors: Li Zhenhua , Liu Jie , Yu Siyuan
Published: October 2021

A simple dynamic time-evolution control method is proposed and experimentally demonstrated in an opto-electronic-oscillator based coherent Ising machine. The experimental results show significant performance improvement can be realized using this method at different parameter settings.
Using the Capacity and Low Latency of Mobile Edge Clouds for Community Applications
Authors: Kilper Dan , Dong Hongying , Knife Aaron T. , Yu Jiakai , Liu Qi , Kim Kevin , Lincoln Bruce , Banks Clayton , Foster Sheila , Sylvain Olivier , Foley Rider , Williams Ronald D.
Published: October 2021

A community edge cloud is developed to use high capacity, low latency mobile edge clouds to realize community-wide, shared virtual desktop computing. Initial latency experiments show 10 ms latency tolerance for video streaming applications.
Plasmonic Data Center Interconnects (DCIs)
Authors: Leuthold Juerg , Baeuerle Benedikt , Heni Wolfgang , Hoessbacher Claudia , Chérix Loïc , Moor David , Eppenberger Marco , Fedoryshyn Yuriy , Koch Ueli , Smajic Jasmin
Published: October 2021

Data centers require optical interconnect solutions that are highly scalable with respect to the channel count, the bit rates and the power consumption. Plasmonics offers smallest footprints, operates up to highest speed, requires little driver circuitry and thus meets many of the DCI requirements.
Process Variation-Aware Photonic Design
Authors: Boning Duane S. , El-Henawy Sally I. , Zhang Zhengxing
Published: October 2021

We present methods for variation-aware compact models, adjoint-based particle defect analysis, and variation extraction for photonic components. These methods can expedite ensemble simulations and enable design-for-manufacturability to increase yield in photonic integrated circuit design.
Demonstration and Fabrication Tolerance Study of a Low-Loss, Ultra-broadband Rapid Adiabatic 3-dB Coupler in a Next- Generation 45 nm Monolithic Electronic-Photonic Platform
Authors: Fargas Cabanillas Josep M. , Kita Derek M. , Khilo Anatol , Sedgwick Forrest , Fini John , Popović Miloš A. , Wade Mark T.
Published: October 2021

We demonstrate a rapid adiabatic coupler (RAC) with 50±1.08% power splitting ratio over 100 nm and insertion loss <0.2 dB at 1290 nm. We measure the device over seven reticles and show low variations in splitting ratio and insertion loss across the wafer.
Entanglement Assisted Communication vs. Classical Optical Communication
Authors: Djordjevic Ivan B.
Published: October 2021

We demonstrate that under imperfect preshared entanglement-distribution, entanglement-assisted (EA) communication can be inferior compared to classical communication. When both signal and idler channels are used for classical transmission then classical capacity is always higher than EA-capacity.
Passive Positioning using Visible Light Systems
Authors: Majeed Khaqan , Hranilovic Steve
Published: October 2021

Passive indoor visible light localization detects changes in illumination patterns in a room to infer the position of a user. We present analytical bounds on positioning error of an object in an indoor scenario and use deep learning to estimate positioning in realistic scenarios.
Photonics-based tunable 1-50 GHz RF transmitter on silicon chip
Authors: Falconi F. , Porzi C. , Malik M. , Scotti F. , Malacarne A. , Ghelfi P. , Bogoni A.
Published: October 2021

The paper presents an innovative tunable software-defined RF transmitter based on integrated photonics, able to work in 1-50GHz with very fast tuning. The system has been characterized and verified in a communication scenario
Photonic-Assisted Microwave OFDM Quantum-Noise Randomized Cipher Generation via IM/DD IFoF Transmission
Authors: Tanizawa Ken , Futami Fumio
Published: October 2021

We propose and demonstrate an IM/DD IF-over-Fiber system that delivers and generates OFDM quantum-noise randomized cipher for secure wireless communications. A 3.6-GHz IF 4.09-Gbit/s PSK cipher with sufficient signal masking by shot noise is generated.
Robust Zero-Change Self-Configuration of the Rectangular Mesh
Authors: Hamerly Ryan , Bandyopadhyay Saumil , Englund Dirk
Published: October 2021

We propose an algorithm to self-configure the rectangular mesh [Clements et al., Optica, vol. 3, p. 1460, 2016] using only external sources and detectors. This procedure is robust to hardware imperfections and leads to significant accuracy improvements for optical neural networks on realistic hardware.
Energy-Efficient Photonic Spiking Neural Network on a monolithic silicon CMOS photonic platform
Authors: Lee Yun-Jhu , On Mehmet Berkay , Xiao Xian , Ben Yoo S. J.
Published: October 2021

We designed, simulated, and taped-out a photonic spiking neural network on a monolithic silicon CMOS photonic platform. Benchmarking shows proposed PSNN outperforms other neuromorphic hardware with 21.09fJ/spike and 61.4 W average power at MNIST experiment.
Scalable and Compact 3D Tensorized Photonic Neural Networks
Authors: Xiao Xian , Ben Yoo S. J.
Published: October 2021

We propose a scalable and compact 3D tensorized photonic neural network with high- radix (1024×1024) synaptic interconnections implemented by cascaded small-radix (10×10) photonic tensor-train cores. Our architecture exhibits 171.8-dB lower insertion loss and 582× fewer MZIs.
Coherent Homodyne Synaptic Interconnect with Sign- and Weight-Tunable Detection
Authors: Schrenk Bernhard
Published: October 2021

We experimentally investigate a synaptic interconnect with low-complexity emitter and coherent receiver. Phase tuning of the LO enables the signed multiplication of the detected signal, which is demonstrated for 130-ps spikes at 1-GHz repetition rate.
Experimental Demonstration of a Nanoseconds Optical Switch based Disaggregated Data Center Network
Authors: Guo Xiaotao , Xue Xuwei , Pan Bitao , Wang Yu , Zhang Shaojuan , Exarchakos Georgios , Calabretta Nicola
Published: October 2021

A disaggregated DCN prototype based on nanoseconds optical switch is experimentally assessed. Results show a network latency of 122.3ns, no packet loss, and error-free operation with power penalty of 0.5dB at BER of 1E-9.
Experimental Assessments of Fast Optical Switch and Control System for Data Center Networks
Authors: Xue Xuwei , Pan Bitao , Chen Sai , Prifti Kristif , Guo Xiaotao , Yan Fulong , Kraemer Rafael , Zhang Shaojuan , Xie Chongjin , Calabretta Nicola
Published: October 2021

A fast switch and control system is developed for the practical deployment of optical switches in DCNs. Implemented label control and OFC technique experimentally achieve zero packet-loss and 5µs server-to-server latency at 0.5 traffic load.
Device Response Time Reduction for Large-Scale and Fast Optical Switching Systems
Authors: Suzuki Kenya , Yonenaga Kazushige , Takachio Noboru , Tanaka Toshiki , Moriwaki Osamu , Onaka Hiroshi
Published: October 2021

We reduced transient response times of a practically used switch element, wavelength- tunable laser, and DSP—key components of optical switching systems—with 1000-port-class scalability and 100-μs order switching time for datacenter applications. © 2021 The Author(s)
Optical Fiber Cable Employing 200 µm-Coated Multicore Fibers for High Density Wiring in Datacom
Authors: Sasaki Yusuke , Fukumoto Ryohei , Takenaga Katsuhiro , Shimizu Shogo , Aikawa Kazuhiko
Published: October 2021

An optical fiber cable employing 200 µm coated 4-core fibers was fabricated and confirmed to satisfy the characteristics required for conventional cables. 200 µm coating multicore fibers are promising candidates for ultra-high density cables.
Photonic sensor and miniature interrogator based on cascaded silicon microring resonators
Authors: Yang Fan , Zhang Wenjia , Jiang Yue , Tao Jifang , He Zuyuan
Published: October 2021

We experimentally demonstrate a novel DBS interrogation technique for mono- lithic refractive index sensing and interrogating using cascaded microring resonators. The sensitivity is 125.1 nm/RIU and resolution is 7.76×10
−
6 RIU.
A hybrid coating based fiber probe for ultrasound generation and detection
Authors: Xu Dongchen , Yang Liuyang , Fang Fang , Chen Geng , Li Yanpeng , Sun Qizhen
Published: October 2021

We demonstrated a hybrid coating based fiber probe for simultaneous ultrasound generation and detection. The probe exhibits a generated pressure of 864kPa and a bandwidth about 25MHz, as well as a high sensitivity of 3.41V/MPa.
FPGA Implementation of Hierarchical Subcarrier Rate and Distribution Matching for up to 1.032 Tb/s or 262144-QAM
Authors: Yoshida Tsuyoshi , Igarashi Koji , Konishi Yoshiaki , Karlsson Magnus , Agrell Erik
Published: October 2021

A novel hierarchical subcarrier rate and distribution matching has been implemented in an FPGA at 1.032 Tb/s. The implemented subsystem achieves seamless data flow among subcarriers at a resolution < 0.01 bit per channel use.
High-speed and Wide FoV Autonomous Beamformer Driving Forward to 4D Resource Allocation in 6G RAN Era
Authors: Chen You-Wei , Su Shang-Jen , Hsu Chin-Wei , Huang Min-Yu , Wang Hua , Chang Gee-Kung
Published: October 2021

We summarized recent progresses of the proposed analog IF beamformer in a fiber- wireless integration and network (FiWIN) architecture. Besides, intra- and inter-beam NOMA systems are designed and experimentally demonstrated to form 4D multiple access structure.
64 Gbit/s, 256 QAM Transmission Through Coherent Optical-Wireless Link at 61 GHz Using Simple and High OSNR Carrier Frequency Converter
Authors: Kasai Keisuke , Sato Taisei , Hirooka Toshihiko , Yoshida Masato , Nakazawa Masataka
Published: October 2021

We demonstrate a coherently-linked optical-wireless transmission in the 61 GHz band using a simple and high-performance injection-locking-based carrier-frequency converter. 64 Gbit/s, 256 QAM data were transmitted over a 10 km-SMF and over 40 m wirelessly.
3×3 MIMO 60-GHz Direct-Detection OFDM RoFMF System with Mitigation of Optical Carrier Power Fading
Authors: Huang Ping-Yao , Xie Zhen-Xiong , Hsieh Tung-Han , Yu Shao-Hung , Wei Chia-Chien , Chi Sien , Lin Chun-Ting
Published: October 2021

We propose a novel method to mitigate the power fading effect in a V-band fiber-wireless 3x3 MIMO system. The proposed scheme can realize the 114.71-Gbps RoFMF system with 1.7-m FMF and 3-m wireless transmission.
NOMA-CoMP for 5G MMW Fiber Wireless Integration Fronthaul System with SFBC
Authors: Yan Jhih-Heng , Hsu Jin-Wei , Huang Jian-Kai , Lin Yu-Yang , Feng Kai-Ming
Published: October 2021

NOMA-CoMP based space frequency block coding is firstly proposed and experimentally demonstrated for 28 GHz MMW fiber wireless integration fronthaul system. The end-to-end experiment reveals enhanced cell edge user signal quality and improved spectral efficiency.
Static Weight Detection and Localization on Aerial Fiber Cables using Distributed Acoustic Sensing
Authors: Ozharar Sarper , Ding Yangmin , Tian Yue , Wang Ting , Yoda Yukihide , Aono Yoshiaki
Published: October 2021

We demonstrated for the first time to our knowledge, the detection and localization of a static weight on an aerial cable by using frequency domain decomposition analysis of ambient vibrations detected by a φ-DAS system.
5.5%-Δ-PLC/Silicon Photonics Hybrid Wavelength MUX/DEMUX-and-Switch Device
Authors: Ikeda Kazuhiro , Matsubara Noritaka , Hasegawa Junichi , Konoike Ryotaro , Matsuura Hiroyuki , Suzuki Keijiro , Kawashima Hitoshi
Published: October 2021

We propose a novel hybrid integration scheme by demonstrating a polarization- insensitive low-crosstalk 8 × 8 silicon photonics switch butt-jointed with a compact extremely- high-Δ SiO2-ZrO2-based 100-GHz 8-ch AWG, which exploits performance advantages of each platform.
Fast Optical Switch Utilizing Coherent Detection Enabled by Cooperative Filtering of Transmission Signal and Local Oscillator (LO) Wavelength Sourced from an LO Bank
Authors: Matsumoto Ryosuke , Konoike Ryotaro , Matsuura Hiroyuki , Suzuki Keijiro , Inoue Takashi , Ikeda Kazuhiro , Namiki Shu , Sato Ken-ichi
Published: October 2021

We propose cooperative filtering scheme for transmission signals and LO channels from an LO bank; this yields 50% filter chip-size reduction and fast (3.2μs) switching. 1,8561,856 optical switching of 128-Gb/s DP-QPSK signals is successfully demonstrated.
AlGaInAs MQW Laser Regrowth on Heterogenerous InP- on-SOI : Performance for Different Silicon Cavity Designs
Authors: Besancon C. , Néel D. , Ramirez J. , Bitauld D. , Cerulo G. , Make D. , Vaissiere N. , Pommereau F. , Fournel F. , Sanchez L. , Dupré C. , Muffato V. , Hassan K. , Decobert J.
Published: October 2021

Vertical p-i-n lasers integrated by wafer-bonding and regrowth on a heterogeneous InP-on-SOI wafer are presented. We demonstrate for the first time lasers based on regrown III-V active regions efficiently coupled to Si-photonic DBR cavities.
Integrated Coherent Tunable Laser (ICTL) with 118 nm Tuning Range and sub-100 Hz Lorentzian Linewidth
Authors: Morton P. A. , Xiang C. , Khurgin J. B. , Morton C. , Tran M. , Peters J. , Guo J. , Morton M. , Bowers J. E.
Published: October 2021

Silicon Photonics foundry based Integrated Coherent Tunable Laser (ICTL) devices display record performance; 118 nm wavelength tuning covering S-, C- and L-bands, Lorentzian linewidths below 100 Hz, and –155 dBc/Hz relative intensity noise.
Non-Abelian gauge fields with fiber optics and beyond
Authors: Yang Yi , Soljačić Marin
Published: October 2021

We observe the non-Abelian Aharonov–Bohm effect by synthesizing non- Abelian gauge fields in a fiber-optic interferometer, enabled by multiple time-reversal sym- metry breaking in orthogonal bases of the Hilbert space. Based on the realized building blocks of non-Abelian gauge fields, We introduce and study a type of non-Abelian Hof- stadter models.
Record-High Power 1.55-μm Distributed Feedback Laser Diodes for Optical Communication
Authors: Mao Yuanfeng , Cheng Yuanbing , Xu Benbo , Ji Ruiqiang , Li Yanbo
Published: October 2021

We demonstrate the first slab-coupled optical waveguide DFB laser diodes at C/C+ bands. Record-high kink-free CW output power of 850 mW and low divergence angle of 10.7° × 16.8° are simultaneously realized.
Coordinating Pluggable Transceiver Control in SONiC-based Disaggregated Packet-Optical Networks
Authors: Sgambelluri Andrea , Scano Davide , Giorgetti Alessio , Paolucci Francesco , Riccardi Emilio , Morro Roberto , Castoldi Piero , Cugini Filippo
Published: October 2021

Effective control of pluggable transceivers in SONiC-based packet-optical nodes is demonstrated. A workflow for multi-layer recovery upon soft failure detection is validated, showing no traffic disruption and fast node-driven coordination between packet and optical operations.
Multi-layer Transport Network Slicing with Hard and Soft Isolation
Authors: Alcalá A. , Barguil S. , López V. , Contreras L.M. , Manso C. , Alemany P. , Casellas R. , Martínez R. , González-Pérez D. , Liu X. , Pulido J.M. , Fernández-Palacios J.P. , Muñoz R. , Vilalta R.
Published: October 2021

We validate the deployment of isolated transport network slices in IP over DWDM network. To this end, an isolated transport network slice is deployed using multi-layer isolation mechanisms based on OpenConfig and ONF Transport API.
The Best Modulation Format for Symmetrical Single-wavelength 50-Gb/s PON at O-band: PAM, CAP or DMT?
Authors: Zhang Jiao , Zhu Min , Wang Kaihui , Zhou Qingyi , Hua Bingchang , Cai Yuancheng , Lei Mingzheng , Zou Yucong , Li Aijie , Xu Weiliang , Wang Jikuan , Liu Xiang , Yu Jianjun
Published: October 2021

We experimentally demonstrated and compared PAM-4, CAP-16QAM and DMT-16QAM modulations in a symmetrical 50-Gb/s/λ PON based on bandwidth-limited optics over the same fiber link at O-band. The performance of power budget and dispersion are discussed.
Up to 20 Mb/s Auxiliary Management and Control Channel Signal Transmission in 50 Gb/s PON System
Authors: Guo Haipeng , Yang Chuanchuan , Qin Xin , Gao Yunfeng , Zheng Ziyuan , Li Hongbin
Published: October 2021

Up to 20 Mb/s transmission of AMCC signal with different modulation formats over 50 Gb/s PAM4 PON is experimentally demonstrated. The results confirm power penalty for PON signal in AMCC superimposition is lower than 1dB.
Over 100Gb/s PS-4096 QAM Signal Bi-directional Transmission in a Full-Duplex MMW-RoF System at E-band
Authors: Wang Kaihui , Zhao Li , Zhou Wen , Liu Cuiwei , Wang Yanyi , Zhao Feng , Yu Jianjun
Published: October 2021

We experimentally demonstrate a bidirectional photonics-aided MMW transmission system at E-band (71-76 GHz and 81-86 GHz). The proposed full-duplex MMW-RoF system can support 7 GBaud PS-4096 QAM signal transmission over 2-m wireless link when satisfying the SD-FEC threshold at 4.2×10-2.
Demonstration of 28-GHz Band Radio Signal Transmission into Vehicle by Analog Radio over Multi-Mode Fiber
Authors: Yasuda Hiroki , Suzuki Toshinori , Kao Hsuan-Yun , Tanaka Satoshi , Ishimura Shota , Tanaka Kazuki , Yamamoto Naokatsu , Kanno Atsushi , Inohara Ryo , Nishimura Kosuke , Aiba Takamitsu , Wakabayashi Tomohiro , Kawanishi Tetsuya
Published: October 2021

We demonstrate transmitting 28-GHz band radio signals from cascaded IFoF based C-RAN mobile fronthaul system to inside a vehicle by re-radiation of the cost-effective analog radio over multi-mode fiber employing a directly modulated VCSEL.
A Quantum-Dash Dual-Wavelength DFB Laser for Optical Millimeter-Wave Radio-over-Fiber Systems
Authors: Zeb Khan , Lu Zhenguo , Liu Jiaren , Mao Youxin , Rahim Mohamed , Poole Philip J , Barrios Pedro , Liu Guocheng , Pakulski Grzegorz , Jiang Weihong , Vachon Martin , Poitras Daniel , Zhang Xiupu
Published: October 2021

We experimentally demonstrate an optical-heterodyne millimeter-wave radio-over-fiber system with broadband wireless links through 25.22 km standard-single-mode fiber featuring a high bitrate of 24-Gb/s (64QAM × 4GBaud) using a highly correlated InAs/InP quantum-dash dual-wavelength DFB laser.
4×10 Gb/s WDM Fiber Wireless multi-IFoF Reconfigurable Fronthaul using a low-loss Si3N4 ROADM for mmWave 5G
Authors: Ruggeri Eugenio , Spasopoulos Dimosthenis , Vagionas Christos , Kalfas George , Oldenbeuving Ruud M. , van Dijk Paul W. L. , Roeloffzen Chris G.H. , Pleros Nikos , Miliou Amalia
Published: October 2021

Four 10 Gb/s multi-IFoF 16-QAM WDM Fiber-Wireless links are transmitted through 10km fiber and 50cm directional V-band antennas and flexibly reconfigured by a Si3N4 ROADM, towards record 40 Gb/s wavelength-routed fronthaul capacity for mmWave 5G.
Field Trial of Semi-active WDM System Based on Multi-carrier Pilot-tone for 5G C-RAN Front-haul Network
Authors: Wang Dong , Lin Youxi , Sun Jiang , Ge Dawei , Zhang Dechao , Zhao Gongyuan , Cai Qian , Li Yunbo , Zhao Yang , Han Liuyan , Zhou Enbo , Li Han
Published: October 2021

Semi-active WDM system based on multi-carrier pilot-tone with on-line management is proposed. Error-free real-time 24-hour filed-trial transmission of 12-channel 25-Gbps eCPRI signals combined with 12-carrier 512-bps pilot-tone OAM signals over 10 km is demonstrated.
Benchmarking of Carrier Phase Recovery Circuits for M-QAM Coherent Systems
Authors: Börjeson Erik , Larsson-Edefors Per
Published: October 2021

We benchmark blind carrier phase recovery DSP circuits in terms of SNR penalty, power dissipation, latency, area usage, and cycle slip probability, to identify optimal implementations for 16, 64, and 256QAM.
100 GBaud SSB PAM-4 Signal Transmission over 80-km SMF with THP and KK Receiver
Authors: Zou Dongdong , Zhang Qihan , Wang Wei , Sui Qi , Yi Xingwen , Li Zhaohui , Gong Xiaoxue , Li Fan
Published: October 2021

We experimentally demonstrate the transmission of 100 GBaud SSB PAM-4 signal with 93.4 GSa/s AWG over 80-km SMF with BER below 20% SD-FEC threshold of 2×10-2, which is enabled by THP, KK receiver and only linear FFE. The proposed scheme is a potential solution for next generation 800 GE 80-km inter-DCI.
32 Tbit/s Transmission over 1400 km Using Power Allocation Optimization
Authors: Lorences-Riesgo A. , Nguyen T.-H. , Mumtaz S. , Le Gac D. , de Jauregui Ruiz I. F. , Sales-Llopis M. , Dris S. , Frignac Y. , Charlet G.
Published: October 2021

Transmission of C-band 40×800 Gbit/s signals using 125 Gbaud PCS-64QAM is demonstrated by performing power allocation optimization at the input of 3 OMSs along a 15-span link (>20 dB loss each) with EDFA-only amplification.
Experimental Demonstration of Remotely Controlled and Powered Tunable Optical 2-4 Taps Correlator of a 20-100 Gbit/s QPSK Channel Based on Laser-Delivered Bias and Control Signals
Authors: Alishahi F. , Minoofar A. , Fallahpour A. , Zou K. , Zhou H. , Habif J. , Tur M. , Willner A. E.
Published: October 2021

We experimentally demonstrate a 2-4 tap QPSK correlation using a cascade of MZIs which are remotely controlled through an optical link. The delivered power to the correlator is tuned and different target patterns are tailored.
Structured Sparsity Learning-based pruned retraining Volterra Equalization for Data-Center Interconnects
Authors: Yadav Govind Sharan , Chuang Chun-Yen , Feng Kai-Ming , Chen Jyehong , Chen Young-Kai
Published: October 2021

We propose a structured sparsity learning-based pruned retraining Volterra equalization for inter-dadta-center interconnects. Compared with conventional VE, we achieve 95% and 90.5% complexity reduction without signal degradation for B2B and 40-km at 80-Gb/s PAM4, respectively.
High Radix SOA-Based Lossless Optical Switch Prototyping for 25 GBaud PAM4 Transmission in Modern Intra-datacenter Applications
Authors: Mojaver Hassan Rahbardar , Li Shanglin , Tolstikhin Valery , Leong Kin-Wai , Liboiron-Ladouceur Odile
Published: October 2021

In a development towards high-radix datacenter networks, we demonstrate 25 GBaud PAM4 transmission through a three-stage 8 × 8 SOA-based lossless optical switch, implemented as a monolithic photonic integrated circuit in indium phosphide.
Entanglement Blocking in DLCZ-based Networks
Authors: Tillman Ian , Kilper Dan , Battou Abdella
Published: October 2021

Resource and performance dependent blocking mechanisms for entanglement routing in quantum networks are identified and characterized in simulations of a DLCZ architecture under different loss and resource availability conditions.
107.6 Tb/s GMI Throughput over 220 km SSMF using Discrete C- and L-Band Amplification across >12 THz
Authors: Demirtzioglou I. , Bendimerad D. F. , de Jauregui Ruiz I. F. , Le Gac D. , Lorences-Riesgo A. , El Dahdah N. , Gallet A. , Elfaiki H. , Yu S. , Gao G. , Escobar-Landero S. , Brenot R. , Frignac Y. , Charlet G.
Published: October 2021

We demonstrate a 107.6-Tb/s GMI throughput in a 3-span 220-km SSMF link employing high-baudrate 95-GBaud CS64QAM signals and fully discrete C- and L-band amplifiers. A total amplification bandwidth in excess of 12 THz is achieved.
Non-Volatile Operation of a Si PN Ring Resonator with a Ferroelectric Capacitor
Authors: Han Seung-Min , Rho Dae-Won , Ahn Dae-Hwan , Song Jin-Dong , Choi Woo-Young , Han Jae-Hoon
Published: October 2021

We demonstrated the non-volatile operation of a Si PN ring resonator with a ferroelectric HfZrO2 capacitor. Due to the polarization in the HfZrO2 capacitor, the resonance wavelength of the ring resonator shows the bi-stable operation.
Low-Complexity Symbol-rate Rx DSP for Short-Reach Optical Coherent Transmission Systems
Authors: Ke Jianhong , He Zilong , Xin Chao , Yang Ting , Li Chuandong
Published: October 2021

We propose an efficient low-power symbol-rate Rx DSP scheme for short-reach optical coherent systems targeting DCI scenarios. Compared with typical sampling rate of 2 sample/symbol, the power consumption of both Rx DSP and ADC can be reduced by ~50%.
Uncertainty Analysis for Failure Prediction in Optical Transport Network Using Bayesian Neural Network
Authors: Wang Lingling , Wang Danshi , Zhang Chunyu , Liu Songlin , Zhang Min
Published: October 2021

A Bayesian neural network-based uncertainty analysis technique is proposed for failure prediction in optical transport network, which can not only achieve F1-score up to 99.5%, but also give an uncertainty quantification for the prediction results.
Inverse-Designed InP-Based Polarization Rotator-Splitter
Authors: Perestjuk Marko , Boerma Hendrik , Schindler Alexander , Keyvaninia Shahram , Runge Patrick , Schell Martin
Published: October 2021

A size-reduced InP-based inverse-designed polarization rotator-splitter is presented, being the first demonstration of a topology-optimized passive waveguide component on InP. The manufactured device has extinction ratios >10dB for both polarizations over the entire C-band.
System-Level Inverse Design for Stokes Receivers on a Commercial Foundry Platform
Authors: Hammond Alec M. , Ralph Stephen E.
Published: October 2021

Using our novel inverse design methodology we design a compact silicon photonic Stokes vector receiver for a commercial foundry. The receiver is comprised of a polarization splitter, polarization rotator, power splitter, and 90° hybrid.
Photonic Spiking VCSEL Neurons using Multi-Frequency Switching
Authors: Fu Bangqi , Zhang Wenjia , Lu Yao , He Zuyuan
Published: October 2021

We propose an approach to generate neuron-like spikes of VCSELs by multi-frequency switching. A frequency modulation is realized by numerical simulation to obtain stable spiking response of up to 1 Gbps.
Prototype of DSP-Free IM/DD MDM Transceiver Based on Multiple-Ring-Core FMF for Datacenter Interconnection
Authors: Gao Yuyang , Ge Dawei , Shen Lei , He Yongqi , Chen Zhangyuan , Li Guifang , Li Juhao
Published: October 2021

We demonstrate the first prototype system of real-time IM/DD MDM transmission with 4 LP modes over 10-km multiple-ring-core FMF. Scalability of the proposed system is discussed and new transmission impairment of Intra-LP-mode dispersion is evaluated.
Weakly-Coupled MCF Direct-Detection OOK Systems Impaired by Laser Phase Noise
Authors: Alves T. M. F. , Rebola J. L. , Cartaxo A. V. T.
Published: October 2021

On-off-keying multicore fiber systems employing different lasers are experimentally investigated. Laser phase noise increases the instantaneous fluctuations of the crosstalk. DFB-based systems may require an additional crosstalk margin of 4 dB relative to ECL-based systems.
SDM Fibers and Devices: Design, Manufacturing, and Applications
Authors: Antonio-Lopez J. Enrique , Alvarado-Zacarias J. Carlos , Wittek Steffen , Cruz-Delgado Daniel , Martinez-Mercado Julian
Published: October 2021

We report recent advances in the fabrication of multicore and multimode fibers, amplifiers, and devices for space division multiplexing. Low-loss and low-crosstalk fibers and devices can be achieved by carefully optimizing the fabrication processes.
Experimental demonstration of phase-sensitive OTDR with adaptive probe-pulse modulation
Authors: Liang Yongxin , Wang Zinan , Lin Shengtao , Rao Yunjiang
Published: October 2021

With deep learning, the restoration of phase-sensitive OTDR impulse response is achieved with double rectangular test pulses, thereafter optimal probe-pulse is designed to suppress interference fading at designated zone.
Highly Stabilized Brillouin Random Fiber Laser Based on Self-inscribed Dynamic Fiber Grating
Authors: Qiu Zenghuan , Xiao Zhelan , Zhang Jilin , Xie Haoran , Jiang Yikun , Pang Fufei , Zhang Liang
Published: October 2021

A self-inscribed dynamic fiber grating as an auto-tracking mode selective element is embedded into a Brillouin random fiber laser, yielding a frequency stabilized Stokes random lasing radiation with highly suppressed modes hoping.
Fiber lasers with regular and random distributed feedback
Authors: Babin Sergey A. , Kuznetsov Alexey G. , Wolf Alexey A. , Skvortsov Mikhail I. , Dostovalov Alexander V. , Kablukov Sergey I. , Podivilov Evgeniy V. , Wabnitz Stefan
Published: October 2021

We review our recent results on fiber lasers with distributed feedback based on π-shifted or random fiber Bragg gratings, and random index structures inscribed by femtosecond pulses in singlemode or multicore/multimode fibers.
High Capacity and Long-Haul Transmission with Space-Division Multiplexing
Authors: Rademacher Georg , Luís Ruben S. , Puttnam Benjamin J. , Ryf Roland , van der Heide Sjoerd , Eriksson Tobias A. , Fontaine Nicolas K. , Chen Haoshuo , Essiambre René-Jean , Awaji Yoshinari , Furukawa Hideaki
Published: October 2021

We report on recent wideband, high-capacity transmission experiments using either few-mode or coupled-core multi-core fibers. We show that the coupled-core multi-core fiber has overall favorable transmission properties at the cost of a lower spatial channel density.
240-Gbps SDM-FSO communication using 4-bundle fiber and 2D photodetector array
Authors: Umezawa Toshimasa , Jitsuno Kunio , Yamamoto Naokatsu , Kawanishi Tetsuya
Published: October 2021

We demonstrate a high-data-rate, free-space optical communication through a 4-bundle fiber using a multi-pixel 2D photodetector array. By employing pre-distortion techniques, a 10-Gbaud, 64-QAM signal transmission per channel could be successfully achieved (BER< 1x10-3).
Elliptical-Aperture Multimode Diversity Reception for Free-Space Optics Communications Under Anisotropic Turbulence
Authors: Huang Yetian , Huang Hanzi , Chen Haoshuo , Alvarado Juan Carlos , Zhang Qianwu , Fontaine Nicolas K. , Mazur Mikael , Ryf Roland , Li Yingchun , Amezcua-Correa Rodrigo , Song Yingxiong , Wang Min
Published: October 2021

We experimentally demonstrate an elliptical-aperture multimode diversity receiver to resist beam wander under anisotropic turbulence. The proposed scheme reduces outage probability from 35% to 1.8% for detecting polarization-diversity 30-Gbaud QPSK signal.
Implementation and evaluation of 2.5 Gbps mobile FSO communication system based on 2.5 GBASE-T standard
Authors: Heo Young Soon , Ryu Ji Hyoung , Yeo Chan Il , Park Siwoong , Kang Hyun Seo
Published: October 2021

We present a full-duplex mobile FSO system that provides a 2.5 Gbps single channel based on the 2.5 GBASE-T standard. We successfully confirm that the data transmitted 2.3 Gbps even in heavy rain and thick smoke.
224-Gb/s 16QAM SV-DD Transmission Using Pilot-Assisted Polarization Recovery with Integrated Receiver
Authors: Zhang Sen , Lu Liwang , Fan Linsheng , Chen Bin , Zhang Tingting , Zuo Tianjian , Liu Lei , Tang Jin , Zeng Li , Chen Pengxin , Huo Jiahao , Zhou Xian , Lau Alan Pak Tao , Lu Chao , Liu Liu , Guo Changjian
Published: October 2021

We propose and experimentally demonstrate a low-complexity pilot-assisted analytical method for polarization demultiplexing in SV-DD systems, achieving a 224-Gb/s 16QAM transmission over 40-km SSMF and can tolerate up to 75-krad/s RSOP at BTB.
Error-Feedback Noise Shaping for Low-Resolution High-Speed IM/DD and Coherent Transmission Systems
Authors: Shu Liang , Yu Zhenming , Sun Kaixuan , Wan Zhiquan , Huang Hongyu , Xu Kun
Published: October 2021

We investigate the performance of error-feedback noise shaping (EFNS) in low-resolution IM/DD and coherent systems by simulations and experiments. EFNS shows comparable performance to digital resolution enhancer and has advantages of complexity & processing delay.
800Gb/s-FR4 specification and interoperability analysis
Authors: Tian Yu , Lin Youxi , Zheng Jianyu , Tang Jin , Huang Qinhui , Ma Huixiao , Rahman Talha , Kuschnerov Maxim , Leung Raymond , Zhang Lewei
Published: October 2021

Interoperability requirements are discussed for 200Gb/s PAM4 and verified using high-bandwidth electro-absorption modulated lasers (EML) and a concatenated forward error correction (FEC) scheme based on hard-decision zipper code, which can be applied to 800Gb/s-FR4 transmission.
Quantization Noise-Aware Partial Pre-Emphasis Model and Experimental Validation in High-Speed IM-DD System
Authors: Wu Qi , Zhu Yixiao , Yin Longjie , Hu Weisheng
Published: October 2021

We propose a novel theoretical model including both the quantization
noise and electrical noise together. A digital partial
α-pre-emphasis is defined and validated both numerically and
experimentally with 60Gbaud PAM-4 signal in bandwidth-limited IM-DD
system.
Evolution of the Roman Space Telescope Flight Grism Component
Authors: Dominguez Margaret Z. , Bray Evan P. , Chambers Victor J. , Fincher Wesley , Gao Guangjun , Gong Qian , Hagopian John G. , Krom Jason R. , Marx Catherine T. , Seide Laurie
Published: October 2021

The Roman Space Telescope will look to survey emission-line galaxies. The Wide Field Instrument aboard it includes a slitless spectrometer or grism, which plays an important role in such a survey. We have begun the process of building the flight grism. A status update is presented in this paper.
Laser Optics Testing: imaging techniques for laser damage detection and analysis
Authors: Gallais Laurent
Published: October 2021

Evaluation of laser damage threshold of optical components requires reliable and sensitive laser damage detection techniques. In this talk we will discuss about imaging techniques for such applications, with emphasis on phase sensitive and time-resolved measurements.
Large-area Measurement with Stereo Deflectometry
Authors: Zhang Xiangchao , Ren Yurong , Chen Yunuo , Li Shaoliang
Published: October 2021

Stereo deflectometry can specify the position of workpiece and reduce the difficulty of geometrical calibration. But the measuring scope is limited, and this issue is especially severe for the measurement of complex surfaces. A method is proposed to extend the measuring scope of stereo deflectometry. The nominal model of the surface under test is aligned with the overlapped measurement area of the stereo system, and the other areas are measured using the monoscopic SCOTS approach. This method effectively combines the advantages of stereo and monoscopic deflectometry, and the measuring accuracy and flexibility can be guaranteed. © 2020 The Author(s)
Error Estimation of High-Power Multilayer Dielectric Grating
Authors: Sabui Deblina , Gupta Arpit , Khan Gufran S.
Published: October 2021

We have analyzed the effects of different fabrication errors in multilayer dielectric gratings (MLDG) to estimate the diffraction efficiency. This study of error analysis helps to forecast the performance of the fabricated gratings.
Using motor current to monitor large mirror polishing in real time
Authors: Whitsitt R. , Martin H. , Loeff A.
Published: October 2021

Measurement of the motor current used to drive orbital lap motion allows monitoring of the interfacial drag force during polishing of the 8.4 m off-axis segments of the Giant Magellan Telescope’s primary mirror.
Thin curved optics and the Twyman effect
Authors: Lakshmanan Sanjay N. , Lambropoulos John C.
Published: October 2021

We use numerical simulations and analytical techniques to assess the role of local thickness nonuniformity and curvature in the Twyman effect. A flat optic of similar thickness is used as a convenient metric for comparison.
A simulation-based optimization approach for the heating process of precision glass molding
Authors: Zhang Yingying , Liang Rongguang , Milster Tom D.
Published: October 2021

We propose a simulation-based approach to quickly determine mold and glass preform geometries to realize the homogeneous heating process of precision glass molding. By the proposed method, a maximum temperature distribution difference within 3℃ could be realized.
Separating and Estimating Impacts of Anisotropic Mid- Spatial Frequency Errors
Authors: DeMars Luke A. , Suleski Thomas J.
Published: October 2021

We present a methodology based on the areal power spectral density to separate and estimate the impacts of multiple anisotropic mid-spatial frequency surface errors on optical performance.
Enhancing Long Radius Testability with Subaperture Stitching Interferometry
Authors: Murphy Paul E. , Supranowitz Chris
Published: October 2021

Long radius of curvature surfaces (>1 m) often require custom transmission spheres or a long interference cavity. Subaperture stitching interferometry can significantly expand testability of such long radii using standard transmission elements.
Ultrafast Laser Enabled Optical Fabrication
Authors: Qiao Jie
Published: October 2021

This paper presents methods, computational models, physical processes, and demonstrations related to femtosecond laser enabled polishing and micro-joining of optical and optomechanical components.
FT-IR, FT-Raman, NMR Spectroscopic and DFT
Quantum Chemical Investigations of 6-Methylcoumarin
Authors: Kanimozhi R. , Arjunan V.
Published: October 2021

The structural geometry, electronic and reactivity characteristics, vibrational assignments and the
fundamental modes of 6-methylcoumarin have been carried out. The effect of methyl group on the
pyrone skeletal vibrations was also discussed. The experimental vibrational frequencies were compared
with the wavenumbers obtained theoretically from the B3LYP method employing the high level
6-311++G** and cc-pVTZ basis sets. Frontier molecular orbital (FMO) energy and the LUMO-HOMO
energy gap was measured. The atomic charges and the bond properties were examined by natural
bond orbital analysis. The hydrogen and carbon environment were examined by NMR spectra. The
nuclophilic, electrophilic and free radical attacking sites of 6-methylcoumarin were also analyzed.
Patient's reported outcomes – a new philosophy for analyzing the effectiveness of therapy in immunoinflammatory diseases
Authors: Editorial Article
Published: October 2021

A fundamentally important task of modern pharmacotherapy of immunoinflammatory diseases (IID) is a significant improvement in the quality of life (QOL) of patients, the fastest and most complete elimination of the most unpleasant manifestations of the disease, restoration of function and working capacity. Specialists in the therapy of various IID took part in panel dedicated to the discussion of this problem: Professor E.L. Nasonov, PhD., member of the Academy of Science; Professor A.M. Lila, PhD; V.N. Amirjanova, PhD; A.E. Karateev, PhD; T.V. Korotaeva, PhD; O.V. Knyazev, PhD; T.A. Lisitsyna, PhD; M.M Hobeish, PhD; E.S. Filatova. PhD.One of the central issues was the discussion of the need to use the patient's reported outcomes (PROs) indicator in analyzing the results of IID therapy (rheumatoid arthritis, psoriatic arthritis, psoriasis and inflammatory bowel disease). The need for its use is due to the fact that the principal goal of treatment with modern disease modifying antirheumatic drugs (DMARDs) is not only to achieve low activity or remission of IID, but also to maximize the general condition and QOL of patients. Therefore, such manifestations of IID as pain, fatigue, dysfunction, depression and anxiety, etc., must be analyzed in the course of treatment. The development of these symptoms is determined by the main immunopathological process and is associated, among others, with systemic overproduction of a number of pro-inflammatory cytokines. Modern DMARDs: Janus kinase (JAK) inhibitors, in particular tofacitinib, are capable of directly blocking the effect of cytokines on cells (suppressing the intracellular JAK / STAT signaling pathway), quickly and effectively eliminating pain, fatigue and dysfunction. The use of JAK inhibitors seems to be especially appropriate in patients with IID with high inflammatory activity and severe clinical manifestations.
Budáról Rómába
Authors: Tamás Fedeles
Published: October 2021

Rome was the centre of European diplomacy from the middle of 15th century to the depredation of the city in 1527. The formation of certain countries’ foreign representations happened in this period, the appearance of the system of the residing envoys and their spread in a wide range. In this process, when the international relations were modernized, the Holy See, the Republic of Florence and of Venice served as a model. The Roman pope as the primary head of Christianity paid extra attention to the regular connections with the particular churches. As the centre of the Respublica Christiana in the second half of the 15th century, the Eternal City became the supranational heart of European diplomacy; as a consequence every princely court and Signoria was represented by an envoy on the banks of Tiber. The diplomatic representation of king Mathias Corvinus and the Jagiellonian dynasty in the Holy See was multilevel and continuous. In my paper, I am analysing the representation of the Kingdom of Hungary in Rome in the late Middle Ages by focusing on the following questions: What status and nationality did the appointed envoys have? What qualifi cations did they have and what was expected of the diplomats?