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检索条件"机构=State Key Lab State Key Laboratory of Advanced Optical Communication System and Networks"

共 1615 条记录，以下是1441-1450 订阅

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Phase shift compensation of high modulation depth multi-layer InGaAs/InAlAs SESAM

Phase shift compensation of high modulation depth multi-laye...

引用

Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Lingling Chen Meng Zhang Yue Cai Chun Zhou Ling Ren Zhigang Zhang Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Peking University Beijing China

A new InGaAs/InAlAs multi-layer design of broadband SESAM including precise phase shift compensation is proposed. Simulation demonstrates a uniform modulation depth up to 25% for the wavelength from 1000 to 1080 nm.

ISBN: (纸本)9781424438303

关键词： Phase modulation Indium gallium arsenide Indium compounds Reflectivity Absorption Laser mode locking Fiber lasers Laser theory Semiconductor lasers Solid lasers

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Ultra-low repetition rate all-normal-dispersion linear-cavity mode-locked fiber lasers

Ultra-low repetition rate all-normal-dispersion linear-cavit...

引用

Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Meng Zhang Lingling Chen Chun Zhou Yue Cai Zhigang Zhang Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Peking University Beijing China

We demonstrate the long linear-cavity with ultra-low repetition rate Ytterbium-doped fiber laser mode-locked by a SESAM. Output pulses were highly-chirped, with energies high to 75.2 nJ and minimum repetition rate was... 详细信息

ISBN: (纸本)9781424438303

关键词： Fiber lasers Laser mode locking optical fiber polarization optical fiber communication Ring lasers optical fiber couplers optical pulses Laser stability Semiconductor lasers Pump lasers

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A simple and accurate measurement of fiber time delay in free-running linear-cavity laser configuration

A simple and accurate measurement of fiber time delay in fre...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Lingling Chen Meng Zhang Yue Cai Chun Zhou Zhigang Zhang Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Peking University Beijing China

A simple, convenient and accurate technique for measurement of time delay in fiber by using a free-running linear-cavity laser is demonstrated. The uncertainty of time delay was in the order of 10 -7 ~ 10 -6 .

ISBN: (纸本)9781424438303

关键词： Time measurement Delay effects Fiber lasers Frequency measurement Laser mode locking Erbium-doped fiber lasers Laser theory optical fiber testing optical fiber communication Length measurement

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Ultra-low repetition rate SESAM-mode-locked linear-cavity erbium-doped fiber laser

Ultra-low repetition rate SESAM-mode-locked linear-cavity er...

引用

Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Lingling Chen Meng Zhang Chun Zhou Yue Cai Ling Ren Zhigang Zhang Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Peking University Beijing China

We investigated linear-cavity with ultra-low repetition rate Erbium-doped fiber laser mode-locked by a high modulation depth SESAM. Output pulses were highly-chirped, at energy up to 14 nJ and minimum repetition rate ... 详细信息

ISBN: (纸本)9781424438303

关键词： Erbium-doped fiber lasers Laser mode locking optical fiber polarization optical pulses optical fiber communication Laser stability Fiber lasers Laser theory Pulse amplifiers Ring lasers

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OFDM adaptive digital predistortion method combines RLS and LMS algorithm

OFDM adaptive digital predistortion method combines RLS and ...

引用

IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Wei Jian Chongxiu Yu Jianxin Wang Jianguo Yu Lin Wang Key Laboratory of Optical Communication and Light wave Technology (Ministry of Education) Beijing University of Posts and Telecommunications Beijing China State Key Laboratory of Optical Communication Technologies and Networks Wuhan China Key-Laboratory of All-Optical networks & Advanced Communications Networks (Ministry of Education) Beijing Jiaotong University Beijing China

ISBN: (纸本)9781424427994

A novel adaptive digital predistortion method combines RLS (Recursive Least-Square) and LMS (Least Mean-Square) with Volterra kernel is proposed to compensate the nonlinear and memorial distortion of OFDM power amplifier. For RLS could induce unexpected modulation mistakes in small error signal, it is chosen to estimate coefficients in big error signals to ensure the high convergent speed. As soon as the value of error signal is less than defined error threshold, adaptive algorithm is changed from RLS to LMS automatically. LMS that has a stable convergence in small error signals can update coefficients in a smooth convergent process. This particular characteristic is also beneficial to hardware implementation to trace the time variability of power amplifier and compensate memorial nonlinear effects. Furthermore, the constellation distortion and spectrum characteristics of 16-QAM modulated OFDM signals with different predistortion algorithms are analyzed in detail by the simulation process. Compared with conventional single RLS or LMS predistortion algorithm, the results show that the performance of digital adaptive predistortion system could be optimized with both high speed and stability by this new method.

关键词： Predistortion Resonance light scattering Least squares approximation Nonlinear distortion Power amplifiers OFDM modulation Signal processing Kernel Adaptive algorithm Convergence

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A Digital Adaptive Predistortion Method of OFDM Power Amplifier

A Digital Adaptive Predistortion Method of OFDM Power Amplif...

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International Conference on networks Security, Wireless communications and Trusted Computing, NSWCTC

作者： Wei Jian Chongxiu Yu Jianxin Wang Jianguo Yu Lin Wang Key Laboratory of Optical Communication and Light-wave Technology (Ministry of Education) Beijing University of Posts and Telecommunications Beijing China State Key Laboratory of Optical Communication Technologies Networks Wuhan China Key-Laboratory of All-Optical networks & Advanced Communications Networks (Ministry of Education) Beijing Jiaotong University Beijing China

ISBN: (纸本)9781424442232

A novel adaptive digital pre-distortion algorithm with Volterra kernel is provided. According to the error threshold, corresponding convergent process is selected to compensate coefficients of OFDM power amplifier. When the error signal is big, adaptive algorithm with high speed convergence will be picked up. Otherwise,the pre-distorter coefficients updating base on a smooth convergent process which is propitious to hardware implementation to trace the time variability of nonlinear power amplifier and compensate nonlinear effect with memory. Therefore, cost of digital adaptive pre-distortion system can be saved and hardware implementation could be facile.

关键词： Predistortion OFDM Power amplifiers optical amplifiers Kernel Adaptive algorithm Convergence Hardware Polynomials Adaptive filters

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An OFDMA-PON enabling optical interconnections among the optical network units

An OFDMA-PON enabling optical interconnections among the opt...

引用

Asia communications and Photonics Conference and Exhibition (ACP)

作者： Cishuo Yan Yanzhi Wu Tong Ye State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University 800 Dongchuan Rd Shanghai 200240 China State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China

we proposed an orthogonal frequency division multiple access-passive optical networks (OFDMA-PON) that support communication between different optical network units (ONUs) assisted with a FBG. The bandwidth of ONU dat... 详细信息

关键词： optical interconnections optical network units OFDM Bandwidth Passive optical networks optical filters optical receivers optical fiber networks Amplitude modulation Frequency domain analysis

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Simplified cavity for erbium-doped fiber laser mode locked with spectral filtering

Simplified cavity for erbium-doped fiber laser mode locked w...

引用

Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Yue Cai Chun Zhou Lingling Chen Meng Zhang Ling Ren Zhigang Zhang Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Beijing Normal University Beijing China

We report a simplified mode-locked Er fiber laser in normal dispersion with birefringence filters compared with the one with nonlinear polarization evolution mechanism.

ISBN: (纸本)9781424438303

We report a simplified mode-locked Er fiber laser in normal dispersion with birefringence filters compared with the one with nonlinear polarization evolution mechanism.

关键词： Laser mode locking Erbium-doped fiber lasers optical fiber polarization Filters Laser theory Birefringence optical fiber communication Wavelength division multiplexing Filtering optical pulses

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Advances in SESAM and carbon nanotube saturable absorber mode locked fiber lasers

Advances in SESAM and carbon nanotube saturable absorber mod...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Zhigang Zhang Meng Zhang Lingling Chen Yiyang Jiao Zhao Tu Ling Ren Yue Cai Chun Zhou Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Beijing Normal University Beijing China

The paper summarizes recent advances in Er and Yb doped mode locked fiber lasers with saturable absorbers such as semiconductor and carbon nanotube saturable absorbers.

ISBN: (纸本)9781424438303

The paper summarizes recent advances in Er and Yb doped mode locked fiber lasers with saturable absorbers such as semiconductor and carbon nanotube saturable absorbers.

关键词： Laser mode locking Carbon nanotubes Fiber lasers optical fiber polarization Laser theory Absorption optical fiber devices Semiconductor lasers Mirrors optical fiber communication

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Sub-100khz repetition rate mode-locked dispersion managed erbium-doped fiber laser

Sub-100khz repetition rate mode-locked dispersion managed er...

引用

Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Yue Cai Chun Zhou Lingling Chen Meng Zhang Ling Ren Peng Li Zhigang Zhang Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Beijing Normal University Beijing China

A 91.4 kHz repetition rate Er-doped dispersion managed mode-locked fiber laser was demonstrated. The pulse energy was amplified to 790 nJ though single stage amplifier.

ISBN: (纸本)9781424438303

A 91.4 kHz repetition rate Er-doped dispersion managed mode-locked fiber laser was demonstrated. The pulse energy was amplified to 790 nJ though single stage amplifier.

关键词： Erbium-doped fiber lasers Laser mode locking optical fiber polarization Pulse amplifiers optical fiber communication Laser theory optical pulses Space vector pulse width modulation Fiber lasers Wavelength division multiplexing

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