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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This work has been supported by the National Natural Science Foundation of China (No.10974100), and the Tianjin Natural Science Foundation (No.10JCZDJC24300).
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Wang, Cb., Zhang, Wg., Ruan, J. et al. Characteristic analysis of a novel F-P interferometer based on a pair of FBGs with built-in LPFGs. Optoelectron. Lett. 8, 84–88 (2012). https://doi.org/10.1007/s11801-012-1039-x
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DOI: https://doi.org/10.1007/s11801-012-1039-x