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optical Fiber communication (OFC) Conference

作者： Ziyu Cheng Zidong Guo Yixiao Zhu Weisheng Hu State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University Shanghai China

A bi-directional optical amplification scheme based on single unidirectional EDFA and 8×8 Cyclic-AWG is presented, which has >10dB maximum gain and the additional ROP penalty at 50Gbit/s PAM-4 is ~1dB compared... 详细信息

ISBN: (纸本)9781943580866

关键词： optical fiber amplifiers Stimulated emission Bidirectional control Erbium-doped fiber amplifiers Wavelength division multiplexing optical fiber communication

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6.4Tb/s (16×400Gb/s) nonlinear frequency division multiplexing WDM transmission over 640km SSMF 26

6.4Tb/s (16×400Gb/s) nonlinear frequency division multiplex...

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26th Optoelectronics and communications Conference, OECC 2021

作者： Chen, Xinyu Fang, Xiansong Yang, Fan Ming, Hao Li, Chenjia Zhang, Lei Zhang, Fan State Key Laboratory of Advanced Optical Communication Systems and Networks Frontiers Science Center for Nano-Optoelectronics Department of Electronics Peking University Beijing100871 China Peng Cheng Laboratory Shenzhen518055 China

We experimentally demonstrate nonlinear frequency division multiplexing WDM transmission over 640km SSMF with a record data capacity of 6.4Tb/s by employing the continuous nonlinear spectrum and neural network-based e... 详细信息

ISBN: (纸本)9781557528209

关键词： Frequency domain analysis

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Efficient coupling modulation of silicon racetrack ring resonators at 2 μm waveband

Efficient coupling modulation of silicon racetrack ring reso...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Xi Wang You Wu Jianing Wang Jian Li Yihang Li Jiangbing Du Lei Wang Zhixue He Xi Xiao Ke Xu Department of Electronic and Information Engineering Harbin Institute of Technology Shenzhen China State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China Peng Cheng Laboratory Shenzhen China

We have experimentally demonstrated 30 Gbit/s coupling modulation based on silicon racetrack ring resonator operating at 2 μm waveband. The modulator has EO bandwidth beyond 18 GHz and modulation efficiency of 0.75 V... 详细信息

ISBN: (纸本)9781957171258

关键词： Electrooptical modulators Modulation Modulators optical directional couplers Ring resonators Silicon modulators

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Microcomb based silicon photonics data link with 100Gbps/Lane PAM4 transmission

Microcomb based silicon photonics data link with 100Gbps/Lan...

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CLEO: Science and Innovations, S and I 2022

作者： Shu, Haowen Shen, Bitao Chang, Lin Tao, Yuansheng Xie, Weiqiang Jin, Ming Netherton, Andrew Zhang, Xuguang Qin, Jun Chen, Ruixuan Yu, Shaohua Wang, Xingjun Bowers, John E. State Key Laboratory of Advanced Optical Communications System and Networks Peking University Beijing100871 China Department of Electrical and Computer Engineering University of California Santa BarbaraCA93106 United States Peng Cheng Laboratory Shenzhen518055 China Frontiers Science Center for Nano-optoelectronics Peking University Beijing100871 China

We achieve 100 Gbps/Lane PAM4 transmission by employing an AlGaAsOI microcomb source and silicon modulators. With 20 parallel wavelength channels utilized at C-band, an aggregate data rate of 2 Tbit/s is achieved. ... 详细信息

ISBN: (纸本)9781557528209

关键词： Gallium compounds

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Wideband Microwave Vector Network Analyzer Based on Photonic Harmonic Mixing

SSRN

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SSRN 2022年

作者： Chen, Xiaoen Ding, Min Pan, Lei Chen, Jianping Wu, Guiling State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China

We present a microwave vector network analyzing method based on photonic harmonic mixing that can relax the demand for electrical equipment, such as bandwidth and sample rate. The received microwave signal is down-converted to a digital intermediate frequency signal with a fixed frequency, and the scattering parameters (S parameters) in the frequency domain of the device under test are acquired. Experiments have been conducted to validate the suggested vector network analyzing method. The measurable frequency ranges of 2-20 GHz and 2-40 GHz are obtained by employing 1st and 2nd sidebands, respectively, with accessible devices. With claimed greater bandwidth electro-optic modulators and microwave sources, the measurable frequency range can be expanded to 100 GHz. The harmonics and spurs from the microwave source have no effect on the dynamic range. The relationships between dynamic ranges and frequency are measured using 1st sideband and 2nd one. Compared to the commercial VNA’s dynamic range of 80 dB with an equivalent resolution bandwidth (RBW) of 20 kHz, the dynamic range of the proposed scheme at 2 GHz using 1st sideband exceeds 63 dB with an equivalent RBW of 16 kHz, which can be further enhanced to over 100 dB by increasing the number of sampling points to narrow the equivalent resolution bandwidth. © 2022, The Authors. All rights reserved.

关键词： Electric network analyzers

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A Grey-box Launch-profile Aware Model for C+L Band Raman Amplification

arXiv

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arXiv 2022年

作者： Zhang, Yihao Liu, Xiaomin Liu, Yichen Yi, Lilin Hu, Weisheng Zhuge, Qunbi State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China

Based on the physical features of Raman amplification, we propose a three-step modelling scheme based on neural networks (NN) and linear regression. Higher accuracy, less data requirements and lower computational complexity are demonstrated through simulations compared with the pure NN-based method. © 2022, CC BY-NC-ND.

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optical Field Recovery in the Jones Space

TechRxiv

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TechRxiv 2022年

作者： Wu, Qi Zhu, Yixiao Jiang, Hexun Zhuge, Qunbi Hu, Weisheng The State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China

optical full-field recovery makes it possible to compensate fiber impairments such as chromatic dispersion and polarization mode dispersion (PMD) in the digital signal processing. Coherent detection dominates over the long-haul transmission system due to its high spectral efficiency and tolerance against optical impairments. For cost-sensitive short-reach optical networks, some advanced single-polarization (SP) optical field recovery schemes are recently proposed to avoid chromatic dispersion-induced power fading effect, and improve the spectral efficiency for larger potential capacity. Polarization division multiplexing (PDM) can further double both the spectral efficiency and the system capacity of these SP carrier-assisted direct detection (DD) schemes. However, the so-called polarization fading phenomenon induced by random polarization rotation is a fundamental obstacle to exploit the polarization diversity for carrier-assisted DD systems. In this paper, we propose a receiver of Jones-space field recovery (JSFR) to realize polarization diversity with SP carrier-assisted DD schemes in the Jones space. There different receiver structures of proposed JSFR and the simplification for JSFR are explored theoretically. The proposed JSFR pushes the SP DD schemes towards PDM without no extra optical signal-to-noise ratio (OSNR) penalty. In addition, the JSFR shows good tolerance to PMD since the optical field recovery is conducted before polarization recovery. In the concept-of-proof experiment, we demonstrate 448-Gb/s reception over 80-km single-mode fiber using the proposed JSFR based on 2×2 couplers. Qualitatively, we compare the optical field recovery in the Jones space and Stokes space from the perspective of the modulation dimension. © 2022, CC BY.

关键词： Polarization

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optical Field Recovery in Jones Space

arXiv

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arXiv 2022年

optical full-field recovery makes it possible to compensate for fiber impairments such as chromatic dispersion and polarization mode dispersion (PMD) in the digital signal processing. For cost-sensitive short-reach optical networks, some advanced single-polarization (SP) optical field recovery schemes are recently proposed to avoid chromatic dispersion-induced power fading effect, and improve the spectral efficiency for larger potential capacity. Polarization division multiplexing (PDM) can further double both the spectral efficiency and the system capacity of these SP carrier-assisted direct detection (DD) schemes. However, the so-called polarization fading phenomenon induced by random polarization rotation is a fundamental obstacle which prevents SP carrier-assisted DD systems from polarization diversity. In this paper, we propose a receiver of Jones-space field recovery (JSFR) to realize polarization diversity with SP carrier-assisted DD schemes in Jones space. Different receiver structures and simplified recovery procedures for JSFR are explored theoretically. The proposed JSFR pushes the SP DD schemes towards PDM without extra optical signal-to-noise ratio (OSNR) penalty. In addition, the JSFR shows good tolerance to PMD since the optical field recovery is conducted before polarization recovery. In the concept-of-proof experiment, we demonstrate 448-Gb/s reception over 80-km single-mode fiber using the proposed JSFR based on 2×2 couplers. Furthermore, we qualitatively compare the optical field recovery in Jones space and Stokes space from the perspective of the modulation dimension. Copyright © 2022, The Authors. All rights reserved.

关键词： Polarization

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Optics-Informed Fully Convolutional networks for Enhanced Channel Equalization in High-Speed VCSEL-Based optical Interconnects

Optics-Informed Fully Convolutional Networks for Enhanced Ch...

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Asia communications and Photonics Conference and Exhibition (ACP)

作者： Yuting Xu Chuanchuan Yang Zhaopeng Xu Hao Qin Jianwei Tang Yuping Zhao Pengcheng Laboratory Peking University Shenzhen Graduate School Peking University Shenzhen China State Key Laboratory of Advanced Optical Communication Systems and Networks Peking University Beijing China Department of Circuits and Systems Pengcheng Laboratory Shenzhen China School of Electronics Peking University Beijing China

This paper proposes an optics-informed fully convo-lutional network equalizer for high-speed VCSEL-based optical interconnects. The proposed method demonstrates significant performance improvements across different tr... 详细信息

ISBN: (数字)9798350379266

ISBN: (纸本)9798350379273

关键词： optical interconnections Sensitivity Equalizers system performance optical fiber networks optical receivers optical sensors Convolutional neural networks High-speed optical techniques Photonics

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Active whispering-gallery microclock in pulsed-operation mode

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Physical Review A 2023年第4期107卷 043712-043712页

作者： Deshui Yu Jingbiao Chen Shougang Zhang National Time Service Center Chinese Academy of Sciences Xi'an 710600 China State Key Laboratory of Advanced Optical Communication Systems and Networks Institute of Quantum Electronics School of Electronics Peking University Beijing 100871 China University of Chinese Academy of Sciences Beijing 100049 China

A whispering-gallery-mode microlaser in the bad-cavity limit serves as an active optical clock. In this clock scheme, an ensemble of two-level atoms is trapped in a two-color ring-shaped optical lattice, i.e., Lamb-Dicke regime, and evanescently interacts with an optical microcavity. The microclock is operated in the pulsed mode, where the atoms are periodically pumped into the upper state of the electric-dipole-forbidden clock transition, providing the optical gain. The numerical simulation shows that the fractional frequency instability of the microclock reaches 5×10−14 at 103 s of averaging, mainly limited by the lattice-induced frequency shifts. This miniature optical clock owns the high integration and can be potentially used to supply the time standard in a photonic network, paving the way towards the on-chip metrology.

关键词： Atomic, optical & lattice clocks Superradiance & subradiance

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