Strain Characteristics of Cascaded-Chirped Long Period Fiber Gratings Depending on Order of Cladding Mode
Strain Characteristics of Cascaded-Chirped Long Period Fiber Gratings Depending on Order of Cladding Mode
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级联啁啾长周期光纤光栅随包层模式阶次的应变特性
DOI：
10.1109/oecc48412.2020.9273551
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Ito Fumihiko
中科院分区：
文献类型：
--
作者：
Soares Manuel Guterres;Nakaya Koki;Fukushima Koken;Wada Atsushi;Tanaka Satoshi;Ito Fumihiko
我们从传感器使用的角度研究了级联啁啾长周期光纤光栅（C-CLPG）的透射率通道光谱对施加应变的光学频移敏感性。在实验中，通过改变两种类型的 CLPG 的级联距离制造了八种不同类型的 C-CLPG，并使用互相关技术测量了应变引起的光谱位移，该技术提供了高精度的光谱位移测定。结果表明，包层模式的阶次越高，C-CLPG 对应变的频移敏感性越高。
We have investigated optical frequency-shift sensitivity of the transmittance channeled spectrum of cascaded-chirped long period fiber gratings (C-CLPGs) to an applied strain from the viewpoint of the sensor use. In the experiment, eight different kinds of C-CLPGs have been fabricated by changing the cascaded distance for two types of CLPGs and the strain-induced spectral shifts are measured by use of a cross-correlation technique which provides highly precise determination of the spectral shift. As a result, it is confirmed that the higher frequency-shift sensitivities of the C-CLPGs to the strain obtain with the higher order of cladding mode.