• Chinese Optics Letters
  • Vol. 14, Issue 5, 050606 (2016)
Jianming Zhu, Long Jin*, Yizhi Liang, Linghao Cheng, and Bai-Ou Guan
Author Affiliations
  • Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou 510632, China
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    DOI: 10.3788/COL201614.050606 Cite this Article Set citation alerts
    Jianming Zhu, Long Jin, Yizhi Liang, Linghao Cheng, Bai-Ou Guan. Temperature-compensated dual-polarization fiber grating laser sensors[J]. Chinese Optics Letters, 2016, 14(5): 050606 Copy Citation Text show less

    Abstract

    We report on temperature compensation for beat-frequency-encoded dual-polarization fiber laser sensors based on a cleave-rotate-splice method. By cleaving the laser cavity into two segments with comparable lengths, aligning them with a rotated angle of 90°, and then fusion splicing the two halves, the temperature sensitivity in terms of beat-frequency variation can be greatly reduced from 1.99 to 0.30 MHz/°C (or by 84.9%). In contrast, the sensitivity to point loaded mass hardly changes. We also find that the beat-frequency fluctuation decreases from ±30 to ±25 kHz as a result of the temperature compensation.
    4πcvx,yns,fL=2Mπ,(1)

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    Δv0=cBn0λ0,(2)

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    δ(Δν0)Δν0=[1BδBδT(α+2ξ)]δT,(3)

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    Δv=Δv0|l1l2|L.(4)

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    δ(Δυ)Δυ=δT.[1BδBδT|l1l2|L(α+2ξ)].(5)

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    Jianming Zhu, Long Jin, Yizhi Liang, Linghao Cheng, Bai-Ou Guan. Temperature-compensated dual-polarization fiber grating laser sensors[J]. Chinese Optics Letters, 2016, 14(5): 050606
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