An optical fiber Mach-Zehnder interferometer (MZI) is proposed by concatenating two micro cavities that are fabricated by a femtosecond laser. The interferometer is applied for strain sensing with a sensitivity of -664.2 nm/specialeqno=”A2” which is comparable to long period fiber grating and taperbased strain sensors. Also, it exhibits a good reversibility in loading and unloading processes. The relationship between intensity variation and applied strain is a quadratic function. The refractive index dependence and temperature dependence of the interferometer are also investigated. Further, this structure is more robust than taper- or trench-based fiber sensors because of no reduction in fiber diameter direction.


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    Title :

    Optical Fiber Mach-Zehnder Interferometric Strain Sensor Basedon Concatenating Two Micro Cavities Fabricated by A Femtosecond Laser


    Contributors:
    Yang, Jinpeng (author) / Wang, Sumei (author) / Chen, Xiaoguang (author) / Zou, Xiaofeng (author) / Liu, Yuxiao (author) / Lin, Ruo (author) / Wang, Yimin (author) / Chenl, Yang (author)


    Publication date :

    2019-07-01


    Size :

    546525 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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