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Proceedings Paper

Characteristics research of self-amplified distributed feedback fiber laser
Author(s): Zhiqiang Song; Haifeng Qi; Jian Guo; Chang Wang; Gangding Peng
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Paper Abstract

A distributed feedback (DFB) fiber laser with a ratio of backward to forward output power of 1:100 was composed by a 45mm length asymmetrical phase-shifted fiber grating fabricated on 50mm erbium-doped photosensitive fiber. Forward output laser was amplified using a certain length of Nufern EDFL980-Hp erbium-doped fiber to absorb surplus pump power after the active phase-shifted fiber grating and get population inversion. 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 narrow line-width and low noise, a narrow-band light filter consisted of a FBG with the same Bragg wavelength as the laser and an optical circulator was used to filter the ASE noise of the out-cavity erbium-doped fiber. The designed laser structure sufficiently utilized the pump power, a DFB fiber laser of 32.5mW output power, 11.5 kHz line width, and -87dB/Hz relative intensity noise (RIN) at 300mW of 980 nm pump power was brought out.

Paper Details

Date Published: 15 October 2013
PDF: 4 pages
Proc. SPIE 8924, Fourth Asia Pacific Optical Sensors Conference, 89240Y (15 October 2013); doi: 10.1117/12.2034664
Show Author Affiliations
Zhiqiang Song, Key Lab. of Optical Fiber Sensoring Technology of Shandong Province (China)
Haifeng Qi, Key Lab. of Optical Fiber Sensoring Technology of Shandong Province (China)
Jian Guo, Key Lab. of Optical Fiber Sensoring Technology of Shandong Province (China)
Chang Wang, Key Lab. of Optical Fiber Sensoring Technology of Shandong Province (China)
Gangding Peng, The Univ. of New South Wales (Australia)


Published in SPIE Proceedings Vol. 8924:
Fourth Asia Pacific Optical Sensors Conference
Minghong Yang; Dongning Wang; Yun-Jiang Rao, Editor(s)

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