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Proceedings Paper

Effects of Rayleigh backscattering on distributed feedback fiber laser sensors
Author(s): Tuanwei Xu; Meizhen Ren; Jun He; Gaosheng Fang; Fang Li; Yuliang Liu
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Paper Abstract

Rayleigh backscattering induces mode hopping of DFB fiber lasers in the sensor array, and the critical length related to Rayleigh backscattering limits the size of DFB fiber laser sensor networking. Based on three-mirror cavity model, the critical length for DFB fiber lasers are derived. It increases nearly exponentially with the coupling coefficient for the ideal π-shifted DFB fiber lasers. While the reflectivity of the sub-FBG at lasing wavelength is the main factor to resist Rayleigh backscattering for a non-ideal DFB fiber laser. The corresponding experiments have been carried out, and the results agree with the predictions.

Paper Details

Date Published: 3 December 2014
PDF: 5 pages
Proc. SPIE 9297, International Symposium on Optoelectronic Technology and Application 2014: Laser and Optical Measurement Technology; and Fiber Optic Sensors, 92973B (3 December 2014); doi: 10.1117/12.2073022
Show Author Affiliations
Tuanwei Xu, Institute of Semiconductors (China)
Meizhen Ren, Institute of Semiconductors (China)
Jun He, Institute of Semiconductors (China)
Gaosheng Fang, Institute of Semiconductors (China)
Fang Li, Institute of Semiconductors (China)
Yuliang Liu, Institute of Semiconductors (China)


Published in SPIE Proceedings Vol. 9297:
International Symposium on Optoelectronic Technology and Application 2014: Laser and Optical Measurement Technology; and Fiber Optic Sensors
Jurgen Czarske; Shulian Zhang; David Sampson; Wei Wang; Yanbiao Liao, Editor(s)

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