Characteristic analysis of a novel F-P interferometer based on a pair of FBGs with built-in LPFGs |
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| Authors: | Wang Chun-bao Zhang Wei-gang Ruan Juan Shang Jia-bin and Yan Ai-dong |
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| Affiliation: | Key Laboratory of Optoelectronic Information and Technology, Ministry of Education, Institute of Modern Optics, Nankai
University, Tianjin 300071, China;Key Laboratory of Optoelectronic Information and Technology, Ministry of Education, Institute of Modern Optics, Nankai
University, Tianjin 300071, China;Key Laboratory of Optoelectronic Information and Technology, Ministry of Education, Institute of Modern Optics, Nankai
University, Tianjin 300071, China;Key Laboratory of Optoelectronic Information and Technology, Ministry of Education, Institute of Modern Optics, Nankai
University, Tianjin 300071, China;Key Laboratory of Optoelectronic Information and Technology, Ministry of Education, Institute of Modern Optics, Nankai
University, Tianjin 300071, China |
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| Abstract: | The transmission characteristics of a Fabry-Pérot (F-P) interferometer based on a fiber Bragg grating (FBG) pair with a built-in
long-period fiber grating (LPFG) are theoretically analyzed, and the shift of transmission interference fringe as a function
of environmental refractive index is acquired. The influence of the lengths of F-P cavity, LPFG and FBG on the transmission
characteristics of the proposed interferometer has been numerically investigated, and the simulation results indicate that
the sensitivity of refractive index reaches 2.27 10-6 for an optical spectrum analyzer (OSA) with a resolution of 1 pm. |
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