Measurement of the index of refraction of an liquid by a cladding depleted fiber Bragg grating

被引:3
作者
Shih, Ming Chang [1 ]
Yang, Hui-Hsiung [1 ]
Shih, Chih Hsien [1 ]
机构
[1] Natl Univ Kaohsiung, Dept Elect Engn, Kaohsiung 811, Taiwan
关键词
Fiber Bragg grating sensor; Index of refraction; Liquid identification; TEMPERATURE; SENSOR;
D O I
10.1007/s11082-015-0367-z
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We demonstrated a method of index of refraction measurement for unknown liquids by using a fiber Bragg grating (FBG) which the cladding layer is depleted to enhance the measurement of Bragg wavelength shift due to the variation of the index of the liquid samples. Process of the etching of the cladding layer of the FBG is described, and the procedure to calibrate the wavelength shift of the FBG in variation of standard index oil is discussed. Measurement of index of a sample liquid as high as 1.45 and within accuracy of 0.01 can be achieved, and a FBG signal interrogation system has been integrated to measure the index of refraction of water with different sugar contents.
引用
收藏
页码:1 / 6
页数:6
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