检索结果-南通市图书馆

Ultra-low-loss multi-layer 8×8 microring optical switch

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2023年第5期11卷 712-723页

作者： XIN LI WEI GAO LIANGJUN LU JIANPING CHEN LINJIE ZHOU State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Key Laboratory of Navigation and LocationServicesShanghai Institute for Advanced Communication and Data ScienceDepartment of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China SJTU-Pinghu Institute of Intelligent Optoelectronics Pinghu 314200China

microring-based optical switches are promising for wavelength-selective switching with the merits of compact size and low power ***,the large insertion loss,the high fabrication,and the temperature sensitivity hinder the scalability of silicon microring optical switch *** this paper,we utilize a three-dimensional(3D)microring-based optical switch element(SE)on a multi-layer Si_(3)N_(4)-on-SOI platform to realize highperformance large-scale optical switch *** 3D microring-based SE consists of a Si∕Si_(3)N_(4) waveguide overpass crossing in the bottom and the top layers,and Si_(3)N_(4) dual-coupled microring resonators(MRRs)in the middle *** switch is calibration-free and has low insertion *** the 3D microring-based SEs,we implement an 8×8 crossbar optical switch *** the resonance wavelengths of all SEs are well aligned,only one SE needs to be turned on in each routing path,which greatly reduces the complexity of the switch *** optical transmission spectra show a box-like shape,with a passband width of~69 GHz and an average on-state loss of~0.37 *** chip has a record-low on-chip insertion loss of 0.52-2.66 *** also implement a non-duplicate polarization-diversity optical switch by using the bidirectional transmission characteristics of the crossbar architecture,which is highly favorable for practical applications.100 Gb/s dual-polarization quadrature-phase-shift-keying(DP-QPSK)signal is transmitted through the switch without significant *** the best of our knowledge,this is the first time that 3D MRRs have been used to build highly scalable polarization-diversity optical switch fabrics.

关键词： polarization microring optical

Highly reliable integrated W-band transmitter based on an on-chip dual-mode DFB laser and cascaded microring modulators

在线全文

学校读者我要写书评

暂无评论

光子学研究:英文版 2023年第8期11卷 1431-1436页

作者： XUYING LIU WENJIA ZHANG YUE JIANG HAN WANG DAN LU FAN YANG ZUYUAN HE State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Semiconductor Material Science Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 610054China

We propose an integrated W-band transmitter enabled by an integrated dual-mode distributed feedback(DFB)laser and cascaded silicon photonic microring modulators for next-generation wireless communication.10 Gb/s error-free intensity modulation and direct detection W-band transmission are achieved in experiments by using the dual-mode DFB laser and two free-running ***,we conduct an experiment of dual-carrier modulation based on cascaded microring modulators,achieving 3 dB signal-to-noise ratio improvement and better signaling integrity for wireless *** proposed photonic integrated W-band transmitter will be a viable solution for a high-speed and low-power wireless communication system.

关键词： Gb/s cascaded microring

240 Gb/s optical transmission based on an ultrafast silicon microring modulator

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2022年第4期10卷 1127-1133页

作者： YUGUANG ZHANG HONGGUANG ZHANG JUNWEN ZHANG JIA LIU LEI WANG DAIGAO CHEN NAN CHI XI XIAO SHAOHUA YU State Key Laboratory of Optical Communication Technologies and Networks China Information and Communication Technologies Group Corporation(CICT)Wuhan 430074China National Information Optoelectronics Innovation Center Wuhan 430074China Key Laboratory of Information Science of Electromagnetic Waves(MoE) Fudan UniversityShanghai 200433China Peng Cheng Laboratory Shenzhen 518055China

An ultrafast microring modulator(MRM) is fabricated and presented with V_(π)· L of 0.825 V · cm. A 240 Gb/s PAM-8 signal transmission over 2 km standard single-mode fiber(SSMF) is experimentally demonstrated. PN junction doping concentration is optimized, and the overall performance of the MRM is improved. Optical peaking is introduced to further extend the EO bandwidth from 52 to 110 GHz by detuning the input wavelength. A titanium nitride heater with 0.1 nm/m W tuning efficiency is implemented above the MRM to adjust the resonant wavelength. High bit rate modulations based on the high-performance and compact MRM are carried out. By adopting off-line signal processing in the transmitter and receiver side, 120 Gb/s NRZ, 220 Gb/s PAM-4, and240 Gb/s PAM-8 are measured with the back-to-back bit error ratio(BER) of 5.5 × 10^(-4), 1.5 × 10^(-2), and 1.4 × 10^(-2), respectively. A BER with different received optical power and 2 km SSMF transmission is also investigated. The BER for 220 Gb/s PAM-4 and 240 Gb/s PAM-8 after 2 km SSMF transmission is calculated to be 1.7 × 10^(-2), and 1.5 × 10^(-2), which meet with the threshold of soft-decision forward-error correction,respectively.

关键词： Gb/s modulator microring

Realization of directional single-mode lasing by a GaN-based warped microring

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2021年第4期9卷 432-438页

作者： Shengnan Zhang Yufeng Li Peng Hu Zhenhuan Tian Qiang Li Aixing Li Ye Zhang Feng Yun Shaanxi Provincial Key Laboratory of Photonics&Information Technology Xi’an Jiaotong UniversityXi’an 710049China Solid-State Lighting Engineering Research Center Xi’an Jiaotong UniversityXi’an 710049China

Multimode and random directionalities are major issues restricting the application of whispering gallery mode microcavity *** demonstrated a 40μm diameter microring with an off-centered embedded hole and warped geometry from strained III-nitride quantum well ***-mode directional whispering gallery mode lasing was achieved by the warped structure and high-order mode suppression induced by the off-centered *** addition,the introduction of the off-centered hole reduced the lasing threshold from 3.24 to 2.79 MW/cm^(2) compared with the warped microdisk without an embedded hole while maintaining a high-quality factor of more than *** light emission in 3D was achieved and attributed to the warped structure,which provides a vertical component of the light emission,making it promising for building multifunctional coherent light sources in optoelectronic integration.

关键词： microring mode lasing

Low dispersion broadband integrated double-slot microring resonators optical buffer

在线全文

学校读者我要写书评

暂无评论

Frontiers of Optoelectronics 2016年第4期9卷 571-577页

作者： ChuanWANG Xiaoying LIU Minming ZRANG Peng ZHOU School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan 430074 China

microring resonator optical buffer is attractive in high-speed optical network system, but ordinary microring resonator use strip waveguide as its basic light guide medium, which cannot provide small footprint, low dispersion and high delay-bandwidth product （DBP） simultaneously. Double-slot waveguide structure was first proposed to construct racetrack-microring resonators. It was found that cascading multiple microrings can increase the delay-bandwidth and lower the dispersion of the resonators by optimizing the structure parameters. Optical buffer cascaded by 8 microrings with fiat bandwidth of 20 GHz provided the delay of 150 ps and the dispersion of -10-7 ps/um over 1530-1630 nm, and the footprint of each microring was about 511ma2. This study can provide design methods and theoretical basis support for practical application.

关键词： optical buffer microring resonator delay,slot waveguide dispersion

Dispersion of double-slot in optical microring resonators buffer

在线全文

学校读者我要写书评

暂无评论

Frontiers of Optoelectronics 2016年第1期9卷 106-111页

作者： Chuan WANG Xiaoying LIU Peng ZHOU Peng LI Jia DU School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan 430074 China

In the optical packet switching network, optical buffer is an important device. microring resonator optical buffers provide good delay performance and flexibility in design. By cascading multiple microring resonators, higher delay-bandwidth product is obtained, but the requirements of high integration and low dispersion are hard to satisfy simultaneously. Double-slot waveguide was proposed to construct highly integrated racetrack microring resonators in this study. Based on dispersion analysis of the thickness of each layer of a waveguide, the structure ofwaveguide was optimized to reach flat and low dispersion. Average dispersions of straight and 3 μm bend waveguides were 5.1 ps/（nm·km） and 4.4 ps/（nm· km）, respectively. Besides, the additional loss from coupling was greatly reduced when applying proper relative displacement between straight and bend waveguides. Theoretical and design basis provided in this paper will help to develop multi-microring optical buffers in the future.

关键词： microring optical buffer double-slot waveguide

Modulation characteristics and microwave generation for AlGaInAs/InP microring lasers under four-wave mixing

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2014年第6期2卷 177-181页

作者： Ling-Xiu Zou Yong-Zhen Huang Xiao-Meng Lv Bo-Wen Liu Heng Long Yue-De Yang Jin-Long Xiao Yun Du State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China

The dynamic characteristics are investigated for a microring laser with an external radius of 12μm subject to external optical ***-mode operation with a side mode suppression ratio of 33.4 dB is realized at a biasing current of 25 mA and a temperature of 290 K,and the corresponding small-signal modulation response is obtained with a resonance peak frequency of 7.5 *** the optical injection from a tunable laser,the improvements of the small-signal modulation response induced by four-wave mixing are observed for the microring laser,which shows an additional resonance peak around the frequency of the beat frequency between the lasing mode and the injecting ***,optical generation of a microwave signal is realized by the light beating between the lasing mode and the injecting light measured by a high-speed photodetector and a spectrum analyzer.

关键词： microring microwave mixing

Self-calibrating microring synapse with dual-wavelength synchronization

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonics Research 2023年第2期11卷 347-356页

作者： JUNWEI CHENG ZHENMING HE YUHAO GUO BO WU HAILONG ZHOU TEYAN CHEN YIXIN WU WENWEI XU JIANJI DONG XINLIANG ZHANG Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Optics Valley Laboratory Wuhan 430074China Galileo Advanced Technology Lab Huawei TechnologiesShenzhen 518129China Institute of Strategic Research Huawei TechnologiesShenzhen 518129China

As a resonator-based optical hardware in analog optical computing, a microring synapse can be straightforwardly configured to simulate the connection weights between neurons, but it faces challenges in precision and stability due to cross talk and environmental perturbations. Here, we propose and demonstrate a self-calibration scheme with dual-wavelength synchronization to monitor and calibrate the synaptic weights without interrupting the computation tasks. We design and fabricate an integrated 4 × 4 microring synapse and deploy our self-calibration scheme to validate its effectiveness. The precision and robustness are evaluated in the experiments with favorable performance, achieving 2-bit precision improvement and excellent robustness to environmental temperature fluctuations(the weights can be corrected within 1 s after temperature changes 0.5°C). Moreover, we demonstrate matrix inversion tasks based on Newton iterations beyond 7-bit precision using this microring synapse. Our scheme provides an accurate and real-time weight calibration independently parallel from computations and opens up new perspectives for precision boost solutions to large-scale analog optical computing.

关键词： synchronization microring resonator

Rapid fabrication of microrings with complex cross section using annular vortex beams

在线全文

学校读者我要写书评

暂无评论

Chinese Optics Letters 2022年第2期20卷 187-191页

作者： Chenchu Zhang Hanchang Ye Rui Cao Shengyun Ji Heng Zhang Linhan Zhao Sizhu Wu Hua Zhai Anhui Province Key Laboratory of Aerospace Structural Parts Forming Technology and Equipment Institute of Industry and Equipment TechnologyHefei University of TechnologyHefei 230009China Caltech Optical Imaging Laboratory Andrew and Peggy Cherng Department of Medical EngineeringCalifornia Institute of TechnologyPasadenaCA 91125USA Hefei National Laboratory for Physical Sciences at the Microscale and CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Precision Machinery and Precision InstrumentationUniversity of Science and Technology of ChinaHefei 230026China

A ring-shaped focus, such as a focused vortex beam, has played an important role in microfabrication and optical *** shape and diameter of the ring-shaped focus can be easily adjusted by the topological charge of the vortex. However,the flow energy is also related to the topological charge, making the individual control of diameter and flow energy of the vortex beam impossible. Meanwhile, the shape of the focus of the vortex beam remains in the hollow ring. Expanding the shape of focus of structural light broadens the applications of the vortex beam in the field of microfabrication. Here, we proposed a ring-shaped focus with controllable gaps by multiplexing the vortex beam and annular beam. The multiplexed beam has several advantages, such as the diameter and flow energy of the focal point can be individually controlled and are not affected by the zero-order beam, and the gap size and position are controllable.

关键词： microfabrication femtosecond laser structural beams microring