Characteristics Research on Self-Amplified Distributed Feedback Fiber Laser  

作　　者：Zhiqiang SONG Haifeng QI Jian GUO Chang WANG Gangding PENG 

机构地区：[1]Shandong Key Laboratory of Optical Fiber Sensing Technologies, Laser Institute of Shandong Academy of Sciences,Jinan, 250014, China [2]School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, Australia 2052

出　　处：《Photonic Sensors》2014年第3期265-268,共4页光子传感器（英文版）

摘　　要：A distributed feedback （DFB） fiber laser with a ratio of the backward to forward output power of 1：100 was composed by a 45-ram-length asymmetrical phase-shifted fiber grating fabricated on the 50-mm erbium-doped photosensitive fiber. Forward output laser was amplified using a certain length of Nufern EDFL-980-Hp erbium-doped fiber to absorb the surplus pump power after the active phase-shifted fiber grating and get population inversion. By using OptiSystem software, the best fiber length of the EDFL to get the highest gain was simulated. In order to keep the amplified laser with the narrow line-width and low noise, a narrow-band light filter consisting of a fiber Bragg grating （FBG） with the same Bragg wavelength as the laser and an optical circulator was used to filter the amplified spontaneous emission （ASE） noise of the out-cavity erbium-doped fiber. The designed laser structure sufficiently utilized the pump power, and a DFB fiber laser with the 32.5-mW output power, l l.5-kHz line width, and -87-dB/Hz relative intensity noise （R1N） at 300 mW of 980 nm pump power was brought out.

关 键 词：Distributed feedback fiber laser self-amplification narrow-linewidth LOW-NOISE 

分 类 号：TN248[电子电信—物理电子学] TN722