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Effects of modulation amplitude and frequency of frequency-modulated fiber lasers on the threshold of the stimulated Brillouin scattering in optical fiber

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Chinese Optics Letters 2010年第12期8卷 1124-1126页

作者：陈伟孟洲 College of Optoelectronic Science and Engineering National University of Defense Technology

Stimulated Brillouin scattering （SBS） is a key problem with the increasing power of fiber transmission systems. In this letter, a frequency-modulated fiber laser with an ultra-narrow linewidth is chosen as a light source. The SBS threshold is increased from 4.1 to 6.2 mW at 13-MHz frequency modulation amplitude for a 50-km G652 fiber. We also show that the SBS threshold increases with not only the frequency modulation amplitude, but also the modulation frequency. The modulation frequency should be high enough for effective modulation.

关键词： electric power transmission Fiber lasers Fibers Frequency modulation Light polarization Light sources Optical fibers Ultrasonics

Design of Raman-parametric fiber amplifier for wavelength division multiplex transmission system

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Chinese Optics Letters 2008年第5期6卷 327-330页

作者：江晓弘姜淳章晓鸣 State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University

We optimize the novel configuration of a hybrid fiber amplifier - Raman assisted-fiber-based optical parametric amplifier （R-FOPA）, in which the parametric gain and Raman gain profiles are combined to achieve a flat composite gain profile. The pump powers and the fiber length in the hybrid amplifier are effectively optimized by genetic algorithm （GA） scheme. The optimization results indicate that the RFOPA can achieve a 200-nm flat bandwidth spectrum with the gain of 20 dB and ripple of less than 4 dB.

关键词： Computer networks electric power transmission Fiber amplifiers Fiber optics Genetic algorithms Light amplifiers Microwave amplifiers Multiplexing Optimization Parametric amplifiers Parametric devices

An AWG-based 10 Gbit/s colorless WDM-PON system using a chirp-managed directly modulated laser

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Optoelectronics Letters 2012年第5期8卷 372-375页

作者： Abdul Latif 余重秀忻向军 Aftab Husain Ashiq Hussain Abid Munir Yousaf Khan State Key Laboratory of Information Photonics and Optical Communications of Ministry of Education Beijing University of Posts and Telecommunications Signal Processing and Communication Systems Research Group Heavy Industries Taxila Education City University

We propose an arrayed waveguide grating(AWG)-based 10 Gbit/s per channel full duplex wavelength division multiplexing passive optical network(WDM-PON).A chirp managed directly modulated laser with return-to-zero(RZ) differential phase shift keying(DPSK) modulation technique is utilized for downlink(DL) direction,and then the downlink signal is re-modulated for the uplink(UL) direction using intensity modulation technique with the data rate of 10 Gbit/s per channel.A successful WDM-PON transmission operation with the data rate of 10 Gbit/s per channel over a distance of 25 km without any optical amplification or dispersion compensation is demonstrated with low power penalty.

关键词： electric power transmission Frequency modulation Passive optical networks Wavelength division multiplexing

A novel duplex WDM-PON with DPSK modulated downstream and re-modulation of the downlink signal for OOK upstream

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Optoelectronics Letters 2012年第2期8卷 134-137页

作者： Aftab Hussain 余重秀忻向军原全新刘博 Ashiq Hussain Abdul Latif Abid Munir Yousaf Khan Idress Afridi Key Laboratory of Information Photonics and Optical Communications Ministry of EducationBeijing University of Posts and Telecommunication

We experimentally demonstrate and analyze a 10 Gbit/s full duplex wavelength division multiplexing passive optical net- work （WDM-PON） system. A non-return-to-zero differential phase shift keying （NRZ-DPSK） modulation technique is first utilized for downlink direction, and then the downlink signal is re-modulated for the uplink direction using intensity modulation technique of on-off keying （0OK） with a data rate of 10 Gbit/s per channel. An effective colorless WDM-PON full duplex transmission system is achieved for the data rate of 10 Gbit/s per channel with a channel spacing of 60 GHz over the distance of 25 km with low power penalty.

关键词： electric power transmission Frequency modulation Optical communication

160 km all-optical OFDM transmission system with inline chromatic dispersion compensation

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Chinese Optics Letters 2012年第2期10卷 4-7页

作者：谷星瑶陈宏伟陈明华谢世钟 Tsinghua National Laboratory for Information Science and Technology Department of Electronic EngineeringTsinghua University

An experimental demonstration of an all-optical sampling orthogonal frequency division multiplexing （AOS-OFDM） transmission system with inline chromatic dispersion （CD） compensation is carried out to test the nonlinear influence. With five subcarriers non-return-to-zero （NRZ） modulated, the total bit rate is 50 Gb/s without polarization multiplexing. The receiver end is highly simplified with direct de- tection using optical Fourier transform filter. After transmission in 160-km standard single-mode fiber （SSMF） link with 130-ps/nm residual CD, an optimum input optical power for the system performance is achieved.

关键词： Chromatic dispersion electric power transmission Optical systems Single mode fibers

2006 session, Cigre session 41

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2006 session, Cigre session 41

2008 session proceedings, Cigre session 42

2006年

作者：匿名

来源：畅想之星图书光盘版（南... 评论

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畅想之星图书光盘版（南通市图书馆镜像）

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2008 session proceedings, Cigre session 42