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Proceedings Paper

Study of DFB fiber laser intensity noise and its suppression
Author(s): Yanjie Zhao; Chang Wang; Jiasheng Ni; Jun Chang; Pengpeng Wang; Gangding Peng; Tongyu Liu; Qingpu Wang
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Paper Abstract

We proposed an experimental investigation into the low-frequency intensity noise characteristics of erbium-doped distributed feedback fiber lasers (DFB-FL). And the paper presented a simple self-injection locking (SIL) configuration of DFB fiber laser to suppress the intensity noise. One of the reasons caused intensity noise is the existence of multimode in the DFB-FL. SIL inhibits other modes while enhances dominant mode. Process of locking mode occurred in the DFB-FL was measured in this paper. Comparison of the output powers with and without injection gives a sufficient proof, that it can realize the stable lasing by injecting the feedback laser into the cavity again. When the current of 980nm pump is about 175mA, the intensity noise is suppressed about 25 dB, and relaxation oscillation frequency decreased from 126.5 KHz to 60 KHz in this paper. The results have potential application in high sensitive fiber sensors and optical communication.

Paper Details

Date Published: 30 January 2012
PDF: 6 pages
Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 83511G (30 January 2012); doi: 10.1117/12.914390
Show Author Affiliations
Yanjie Zhao, Shandong Academy of Science (China)
Chang Wang, Shandong Academy of Science (China)
Jiasheng Ni, Shandong Academy of Science (China)
Jun Chang, Shandong Univ. (China)
Pengpeng Wang, Shandong Univ. (China)
Gangding Peng, The Univ. of New South Wales (China)
Tongyu Liu, Shandong Academy of Science (China)
Qingpu Wang, Shandong Univ. (China)

Published in SPIE Proceedings Vol. 8351:
Third Asia Pacific Optical Sensors Conference
John Canning; Gangding Peng, Editor(s)

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