Ring-core photonic crystal fiber interferometer for strain measurement

被引：2
作者：
Chen, Weiguo [1 ]
Lou, Shuqin [1 ]
Wang, Liwen [1 ]
Jian, Shuisheng [1 ]
机构：
[1] Beijing Jiaotong Univ, Inst Lightwave Technol, Beijing 100044, Peoples R China
来源：
OPTICAL ENGINEERING | 2010年 / 49卷 / 09期
基金：
美国国家科学基金会;
关键词：
ring-core photonic crystal fiber; interferometers; fiber optic sensors; SENSOR;
D O I：
10.1117/1.3488045
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A simple modal interferometer is proposed, to be produced by splicing a section of a novel ring-core photonic crystal fiber (RPCF) and two segments of single-mode fibers. Owing to the effects of the collapsed region, the ring modes in the RPCF can be effectively activated. This is the first demonstration of an interferometer based on the interference between ring modes, as opposed to previously reported interferometer based on the interference of core modes or cladding modes. The effects of the length of RPCF and the wavelength on the temperature and strain characteristics of the interferometer are investigated. The strain sensitivity increases with RPCF length and with wavelength. Based on the interferometer, a strain sensor with low temperature sensitivity is proposed, which has strain sensitivity of 1.777 pm/(mu m/m). (C) 2010 Society of Photo-Optical Instrumentation Engineers. [DOI: 10.1117/1.3488045]
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页数：5
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