• Acta Physica Sinica
  • Vol. 69, Issue 18, 184217-1 (2020)
Jing Tian*, Mei-Jiang Hou, Yang Jiang, Hong-Xu Zhang, Guang-Fu Bai, and Hao Feng
Author Affiliations
  • College of Physics, Guizhou University, Guiyang 550025, China
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    DOI: 10.7498/aps.69.20200385 Cite this Article
    Jing Tian, Mei-Jiang Hou, Yang Jiang, Hong-Xu Zhang, Guang-Fu Bai, Hao Feng. High sensitivity fiber displacement sensor based compound ring laser cavity with linear variation of beat frequency signal[J]. Acta Physica Sinica, 2020, 69(18): 184217-1 Copy Citation Text show less
    Schematic diagram of the proposed fiber laser displacement sensor.
    Fig. 1. Schematic diagram of the proposed fiber laser displacement sensor.
    Fiber laser cavity’s excited longitudinal modes controlled by π-FBG’s bandwidth.
    Fig. 2. Fiber laser cavity’s excited longitudinal modes controlled by π-FBG’s bandwidth.
    (a) Optical spectra of Filter, FBG and π-FBG; (b) optical spectrum of the compound ring laser sensor cavity.
    Fig. 3. (a) Optical spectra of Filter, FBG and π-FBG; (b) optical spectrum of the compound ring laser sensor cavity.
    Beat frequency spectra of BFS.
    Fig. 4. Beat frequency spectra of BFS.
    (a) Beat frequency spectrum of straight cavity; (b) beat frequency spectrum of compound ring laser cavity.
    Fig. 5. (a) Beat frequency spectrum of straight cavity; (b) beat frequency spectrum of compound ring laser cavity.
    Beat signal spectra shifts as a function of displacement variations.
    Fig. 6. Beat signal spectra shifts as a function of displacement variations.
    Measured results analysis of the displacement sensor.
    Fig. 7. Measured results analysis of the displacement sensor.
    Jing Tian, Mei-Jiang Hou, Yang Jiang, Hong-Xu Zhang, Guang-Fu Bai, Hao Feng. High sensitivity fiber displacement sensor based compound ring laser cavity with linear variation of beat frequency signal[J]. Acta Physica Sinica, 2020, 69(18): 184217-1
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