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Chinese Optics Letters

Chinese Optics Letters


  • Vol. 11, Iss. 2 — Feb. 1, 2013
  • pp: 020605–

High-sensitivity sensor based on mode number-encoded multi-longitudinal mode fiber laser

Jiejun Zhang, Qizhen Sun, Jianghai Wo, Xiaolei Li, and Deming Liu  »View Author Affiliations

Chinese Optics Letters, Vol. 11, Issue 2, pp. 020605- (2013)

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We propose a high sensitivity sensor based on a mode number-encoded multi-longitudinal mode fiber laser. The fiber laser incorporates a uniform fiber Bragg grating (FBG) and a fiber Fabry-Perot interferometer (FFPI) as sensitive components in the cavity. The sensor counts the number of longitudinal modes (NLM) of fiber laser, which is caused by the mismatch between the reflection band of FBG and the transmission band of FFPI resulting from the application of external perturbation to the FBG. An electrical spectrum analyzer is adopted to analyze the NLM. The strain sensor is experimentally demonstrated to have sensitivity of as high as 0.02 με/mode.

© 2013 Chinese Optics Letters

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(140.3510) Lasers and laser optics : Lasers, fiber
(280.3420) Remote sensing and sensors : Laser sensors

Jiejun Zhang, Qizhen Sun, Jianghai Wo, Xiaolei Li, and Deming Liu, "High-sensitivity sensor based on mode number-encoded multi-longitudinal mode fiber laser," Chin. Opt. Lett. 11, 020605- (2013)

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