中国物理B ›› 2017, Vol. 26 ›› Issue (10): 100702-100702.doi: 10.1088/1674-1056/26/10/100702

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Numerical and experimental analysis of long period gratings in wavelength scale elliptical microfibers

Wa Jin(金娃), Wei-Hong Bi(毕卫红), Guang-Wei Fu(付广伟)   

  1. 1. Department of Optoelectronic Engineering, Yanshan University, Qinhuangdao 066004, China;
    2. The Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province, Qinhuangdao 066004, China
  • 收稿日期:2017-03-15 修回日期:2017-06-02 出版日期:2017-10-05 发布日期:2017-10-05
  • 通讯作者: Wa Jin E-mail:jinwa@ysu.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant No. 61605168), the Natural Science Foundation of Hebei Province, China (Grant No. F2016203392), the College and University Science and Technology Research Project of Hebei Province, China (Grant No. QN2016078), the Science and Technology Project of Qinhuangdao City (Grant No. 201601B050), and the Intramural Doctoral Foundation of Yanshan Universtiy (Grant No. B1011).

Numerical and experimental analysis of long period gratings in wavelength scale elliptical microfibers

Wa Jin(金娃)1,2, Wei-Hong Bi(毕卫红)1,2, Guang-Wei Fu(付广伟)1,2   

  1. 1. Department of Optoelectronic Engineering, Yanshan University, Qinhuangdao 066004, China;
    2. The Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province, Qinhuangdao 066004, China
  • Received:2017-03-15 Revised:2017-06-02 Online:2017-10-05 Published:2017-10-05
  • Contact: Wa Jin E-mail:jinwa@ysu.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant No. 61605168), the Natural Science Foundation of Hebei Province, China (Grant No. F2016203392), the College and University Science and Technology Research Project of Hebei Province, China (Grant No. QN2016078), the Science and Technology Project of Qinhuangdao City (Grant No. 201601B050), and the Intramural Doctoral Foundation of Yanshan Universtiy (Grant No. B1011).

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摘要：

We report the fabrication of long-period gratings (LPGs) in elliptical microfibers with femtosecond laser. Based on the numerical analysis of the modes and the mode coupling condition of elliptical microfibers, an LPG is fabricated with a very short pitch of 10 μm by periodically modifying the fiber surface, which demonstrates very strong polarization-dependent resonances, a very low temperature sensitivity of a few picometers in air, and high temperature sensitivity of -1.62 nm/℃ in refractive index oil.

关键词: elliptical microfiber, long period grating, femtosecond laser, temperature sensitivity

Abstract:

We report the fabrication of long-period gratings (LPGs) in elliptical microfibers with femtosecond laser. Based on the numerical analysis of the modes and the mode coupling condition of elliptical microfibers, an LPG is fabricated with a very short pitch of 10 μm by periodically modifying the fiber surface, which demonstrates very strong polarization-dependent resonances, a very low temperature sensitivity of a few picometers in air, and high temperature sensitivity of -1.62 nm/℃ in refractive index oil.

Key words: elliptical microfiber, long period grating, femtosecond laser, temperature sensitivity

中图分类号:  (Fiber-optic instruments)

  • 07.60.Vg
42.81.Gs (Birefringence, polarization) 42.81.Pa (Sensors, gyros)