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Amplification and Compression of Ultrashort Fundamental Solitons in An Erbium-Doped Nonlinear Amplifying Fiber Loop Mirror

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光学学报 2003年第S1期23卷 393-394页

作者： P. K. A. Wai photonics research centre and department of electronic and information engineering The Hong Kong Polytechnic University Hung HomHong Kong

A nonlinear amplifying loop mirror constructed from erbium-doped fiber is proposed for simultaneous amplification and compression of ultrashort fundamental solitons. Numerical simulations show that, the proposed devic... 详细信息

关键词： of length that for Amplification and Compression of Ultrashort Fundamental Solitons in An Erbium-Doped Nonlinear Amplifying Fiber Loop Mirror in

Stopping and storing light pulses within a fiber optic ring resonator

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Chinese Optics Letters 2009年第9期7卷 778-780页

作者： F.H.Suhailin J.Ali P.P.Yupapin Y.Fujii H.Ahmad S.W.Harun Institute of Advanced photonics Sciences Science FacultyUniversiti Teknologi Malaysia Advanced research Center for photonics Faculty of ScienceKing Mongkut's Institute of Technology Ladkrabang department of electronic engineering Gunma University photonics research centre University of Malaya

A simple all optical system for stopping and storing light pulses is demonstrated. The system consists of an erbium-doped fiber amplifier （EDFA）, a semiconductor optical amplifier （SOA）, and a fiber ring resonator. The results show that the multisoliton generation with a free spectrum range of 2.4 nm and a pulse spectral width of 0.96 nm is achieved. The memory time of 15 min and the maximum soliton output power of 5.94 dBm are noted, respectively. This means that light pulses can be trapped, i.e., stopped optically within the fiber ring resonator.

关键词： ring In Stopping and storing light pulses within a fiber optic ring resonator EDFA

Upstream Channel Utilization of CSMA/CD-Based Ethernet over Passive Optical Networks

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光学学报 2003年第S1期23卷 737-738页

作者： Elaine Wong Chang-Joon Chae Australian photonics Cooperation research centre Photonics Research Laboratory Department of Electrical and Electronic Engineering The University of Melbourne VIC 3010 Australia.Australian Photonics Cooperation Research Centre Photonics Research Laboratory Department of Electrical and Electronic Engineering The University of Melbourne VIC 3010 Australia.

We demonstrate that an asynchronous CSMA/CD protocol with an optical loop-back star coupler can achieve high upstream channel utilizatbn in an Ethernet PON, readily supporting a large installed base of Ethernet 10Base... 详细信息

关键词： CSMA on as of Upstream Channel Utilization of CSMA/CD-Based Ethernet over Passive Optical Networks ONU OLT over CD

A small microring array that performs large complex-valued matrix-vector multiplication

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Frontiers of Optoelectronics 2022年第2期15卷 1-15页

作者： Junwei Cheng Yuhe Zhao Wenkai Zhang Hailong Zhou Dongmei Huang Qing Zhu Yuhao Guo Bo Xu Jianji Dong Xinliang Zhang Wuhan National Laboratory for Optoelectronics School of Optical and Electronic InformationHuazhong University of Science and TechnologyWuhan 430074China photonics research centre Department of Electronic and Information EngineeringThe Hong Kong Polytechnic UniversityHong Kong 999077China The Hong Kong Polytechnic University Shenzhen research Institute Shenzhen 518057China photonics research centre Department of Electrical EngineeringThe Hong Kong Polytechnic UniversityHong Kong 999077China Institute of Strategic research Huawei TechnologiesShenzhen 518129China

As an important computing operation,photonic matrix-vector multiplication is widely used in photonic neutral networks and signal ***,conventional incoherent matrix-vector multiplication focuses on real-valued operations,which cannot work well in complex-valued neural networks and discrete Fourier *** this paper,we propose a systematic solution to extend the matrix computation of microring arrays from the real-valued field to the complex-valued field,and from small-scale(i.e.,4×4)to large-scale matrix computation(i.e.,16×16).Combining matrix decomposition and matrix partition,our photonic complex matrix-vector multiplier chip can support arbitrary large-scale and complex-valued matrix *** further demonstrate Walsh-Hardmard transform,discrete cosine transform,discrete Fourier transform,and image convolutional *** scheme provides a path towards breaking the limits of complex-valued computing accelerator in conventional incoherent optical *** importantly,our results reveal that an integrated photonic platform is of huge potential for large-scale,complex-valued,artificial intelligence computing and signal processing.

关键词： Photonic matrix-vector multiplication Complex-valued computing Microring array Signal/image processing

Optimization of Generation and Detection of WDM Signals with Advanced Modulation Formats

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光学学报 2003年第S1期23卷 560-561页

作者： Sarah Dods Australian photonics Cooperative research centre Photonics Research Laboratory Department of Electrical and Electronic Engineering The University of Melbourne Victoria 3010 Australia

This paper presents optimal generation and detection of wavelength division multiplexed (WDM) signals with advanced modulation formats. We investigate the relative phase alignment between phase modulation and data bits for chirped return-to-zero (CRZ) signals, and the frequency offset between the RZ carrier and various optical filters for vestigial side band (VSB)-RZ signals.

关键词： WDM on VSB of with

A flexible and high-performance bidirectional optical amplifier with all-optical gain control using ASE noise path through multi-port circulators

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光学学报 2003年第S1期23卷 421-422页

作者： An Vu Tran Chang-Joon Chae Rodney S. Tucker Australian photonics Cooperative research centre Photonics Research Laboratory Department of Electrical and Electronic Engineering The University of Melbourne Vic. 3010 Australia

We report a flexible all-optical gain controlled bidirectional optical amplifier. The device achieves constant gain and low noise figure over a large input power range. Moreover, the device removes Rayleigh backscatte... 详细信息

关键词： gain control optical amplifier amplifier noise noise figure power range

Novel Scheme for Multiple Channel Pulse Generation from a Single Laser Diodefor 10 Gbit/s Based WDM Systems Using RZ Modulation Format

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光学学报 2003年第S1期23卷 373-374页

作者： H. C. Bao Y. J. Wen H. F. Liu Australian photonics Cooperative research centre Photonics Research Laboratory Department of Electrical & Electronic Engineering The University of Melbourne Parkville VIC 3010 Australia

A new technique for the generation of multi-channel optical pulse from a single laser diode (LD) is presented in this paper. 35 channel pulse source with 6.5 GHz repetition rate per channel and 32.5 GHz channel spacing was generated from a subharmonically hybrid mode-locked two section monolithic laser with enhanced amplitude modulation. The obtained pulse source exhibits high extinction ratio (>10 dB) and low level of root mean square (RMS) phase noise (<0.11 rad) over all channels from 1556 nm to 1565...

关键词： amplitude modulation extinction ratio channel spacing optical pulse new technique laser diode

High-speed optoelectronic devices

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Science China(information Sciences) 2023年第5期66卷 5-27页

作者： Yi LUO Changzheng SUN Bing XIONG Jian WANG Zhibiao HAO Yanjun HAN Hongtao LI Lai WANG Beijing National research Center for information Science and Technology (BNRist) Department of Electronic Engineering Tsinghua University

High-speed optoelectronic devices are key components of modern fiber communication systems,and the backbone of information technology. In this paper, we present our work on high-speed devices over the past decades, including high-performance semiconductor lasers and integrated light sources, wideband electrooptic modulators, high saturation power photodetectors, and their applications in both fiber communications and microwave photonics. Gain-coupled distributed feedback(DFB) lasers were fabricated with high singlemode yield. Electroabsorption modulated lasers(EMLs) were demonstrated based on identical epitaxial layer integration scheme, including single channel 40 Gb/s EMLs, and 4 × 25 and 4 × 56 Gb/s EML arrays. Both In P and thin-film lithium niobate based low half-wave voltage electro-optic modulators with modulation bandwidth over 40 GHz were demonstrated. Back-illuminated modified uni-traveling-carrier photodetectors(MUTC-PDs) with high saturation power and bandwidth exceeding 100 GHz were developed. Applications of high-speed optoelectronic devices in fiber-optic links and sub-THz wave generation are presented.

关键词： optoelectronic devices semiconductor lasers optical modulators photodetectors integrated photonic circuits

Analysis of the thermo-optic effect in lateral-carrier-injection SOI ridge waveguide devices

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Journal of Semiconductors 2010年第6期31卷 60-64页

作者：赵佳特赵勇王皖君郝寅雷周强杨建义王明华江晓清 department of information Science and electronic engineering Zhejiang University

The thermo-optic effect in the lateral-carrier-injection pin junction SOI ridge waveguide is analyzed according to the thermal field *** analysis and experimental results show that the thermo-optic effect caused by carrier injection is significant in such devices,especially for small structure *** a device with a 1000μm modulation length,the refractive index rise introduced by heat accounts for 1/8 of the total effect under normal working conditions.A proposal of adjusting the electrode position to cool the devices to diminish the thermal-optic effect is put forward.

关键词： plasma dispersion effect SOI waveguide device thermo-optic effect silicon photonics