【摘 要】
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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 m
【机 构】
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Department of Optoelectronic Engineering Yanshan University,The Key Laboratory for Special Fiber and
【出 处】
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Chinese Physics B
论文部分内容阅读
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/?C in refractive index oil.
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 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 /? C in refractive index oil.
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吴伯超,江苏武进人。1903年8月23日出生。1922年秋考入北京大学附设音乐传习所,师从萧友梅、刘天华、嘉祉等导师,中西兼学,多才多艺。1926年毕业后,曾先后在北京师范学校和