Influence of air gap on the lasing wavelength of the fiber grating external cavity semiconductor laser

HU Chun-xia; WU Zheng-mao; DENG Tao; XIA Guang-qiong

LASER TECHNOLOGY > 2008 > 32(2): 177-179.

HU Chun-xia, WU Zheng-mao, DENG Tao, XIA Guang-qiong. Influence of air gap on the lasing wavelength of the fiber grating external cavity semiconductor laser[J]. LASER TECHNOLOGY, 2008, 32(2): 177-179.

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Influence of air gap on the lasing wavelength of the fiber grating external cavity semiconductor laser

School of Physics, Southwest University, Chongqing 400715, China

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Received Date: December 27, 2006
Revised Date: March 26, 2007
Published Date: April 24, 2008

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Abstract

In order to control accurately the lasing wavelength of the fiber grating external cavity semiconductor laser(FGECSL),after determining the mode distribution based on the phase condition,the influence of the air gap between the head of fiber and the front face of F-P LD on the lasing wavelength of FGECSL was through numerical simulation.The results show that the variation of the air gap will result in the lasing wavelength rippling around the Bragg wavelength of fiber grating(FG),and the amplitude of fluctuation becomes smaller with the increase of the external cavity length.For a fixed length of external cavity,the lasing wavelength can be accurately located in the Bragg wavelength of FG through adjusting the air gap carefully.
- laser physics,
- external cavity semiconductor laser,
- fiber grating,
- lasing wavelength

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