Simple and compact reflective refractometer based on tilted fiber Bragg grating inscribed in thin-core fiber
Simple and compact reflective refractometer based on tilted fiber Bragg grating inscribed in thin-core fiber
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DOI：
10.1364/ol.39.000022
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发表时间：
2014-01-01
期刊：
影响因子：
3.6
通讯作者：
Luan, Feng
中科院分区：
文献类型：
--
作者：
Gu, Bobo;Qi, Wenliang;Luan, Feng
提出了一种基于刻在超高光灵敏度薄芯光纤中的倾斜光纤布拉格光栅（TFBG）的简单紧凑的反射式折射率计，并进行了实验验证。反射式折射计利用一小段包含一个TFBG的薄芯光纤来确保包层模式的重新耦合。反射光谱发生在两个明确定义的波长带，分别对应于布拉格芯模和包层模。结果表明，收集到的包层模的功率随外折射率（RI）的变化而变化，而布拉格芯模的功率不受影响，可以作为温度参考。实验结果表明，该反射式折射计具有较高的折射率灵敏度和温度抗扰度。(C)2013年美国光学学会
A simple and compact reflective refractometer based on a tilted fiber Bragg grating (TFBG) inscribed in an ultra-high photon-sensitive thin-core fiber is proposed and experimentally demonstrated. The reflective refractometer utilizes a short piece of thin-core fiber containing one TFBG to ensure the recoupling of cladding modes. The reflection spectra occur in two well-defined wavelength bands that correspond to the Bragg core mode and cladding modes, respectively. It is found that the power of the collected cladding modes changes with the external refractive index (RI), while that of the Bragg core mode remains unaffected and can be used as the temperature reference. High RI sensitivity and temperature immunity of the proposed reflective refractometer are experimentally achieved. (C) 2013 Optical Society of America