A ray-transfer-matrix model for hybrid fiber Fabry-Perot sensor based on graded-index multimode fiber

被引：46
作者：
Gong, Yuan [1 ]
Zhao, Tian [1 ]
Rao, Yun-Jiang [1 ]
Wu, Yu [1 ]
Guo, Yu [1 ]
机构：
[1] Univ Elect Sci & Technol China, Key Lab Opt Sensing & Commun, Minist Educ, Chengdu 611731, Peoples R China
来源：
OPTICS EXPRESS | 2010年 / 18卷 / 15期
基金：
中国国家自然科学基金;
关键词：
REFRACTIVE-INDEX; TEMPERATURE;
D O I：
10.1364/OE.18.015844
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A theoretical model based on the ray-transfer-matrix method is developed for explaining the principle of a graded-index multimode fiber (GI-MMF) based hybrid fiber Fabry-Perot (GI-FFP) sensor. It is verified by the numerical simulations and experimental results that the high fringe contrast of the reflective spectrum of the sensor is due to the periodic self-focusing effect of the GI-MMF. The influence of the GI-MMF length on the shape of reflective spectrum and corresponding maximum fringe contrast are investigated. Experimental results are in good agreement with the theory. A typical GI-FFP sensor is fabricated and its response to the external refractive index is measured with a maximum sensitivity of similar to 160 dB/RIU (Refractive Index Unit). (C) 2010 Optical Society of America
引用
收藏
页码：15844 / 15852
页数：9
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