Dual-wavelength FBG inscribed by femtosecond laser for simultaneous measurement of high temperature and strain

Yong Zhu, Hao Mei, Tao Zhu, Jie Zhang, Shizhuo Yin

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    A novel fiber Bragg grating (FBG) with two transmission dips in 1310- and 1550-nm regions is proposed and inscribed by an infrared femtosecond laser. Formed by multi-photon ionization, this type of grating can withstand temperature as high as 800°C which makes it suitable for harsh environment sensing. In addition, the temperature and strain affect these two dips in different ways, which enables simultaneous strain and temperature sensing. The fabrication, spectrum characterization, and temperature performance of this grating are introduced.

    Original languageEnglish (US)
    Pages (from-to)675-678
    Number of pages4
    JournalChinese Optics Letters
    Issue number8
    Publication statusPublished - Aug 1 2009


    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Atomic and Molecular Physics, and Optics
    • Electrical and Electronic Engineering

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