Open AccessSensitivity analysis of hybrid fiber Fabry-Pérot refractive-index sensor
Author(s) -
Yuan Gong,
Yu Guo,
Yunjiang Rao,
Tian Zhao,
Wu Yu,
Zengling Ran
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.064202
Subject(s) - multi mode optical fiber , fabry–pérot interferometer , materials science , sensitivity (control systems) , refractive index , fusion splicing , step index profile , optics , graded index fiber , normalized frequency (unit) , fiber optic sensor , fiber , optical fiber , single mode optical fiber , optoelectronics , physics , composite material , electronic engineering , wavelength , engineering , phase locked loop , frequency synthesizer , phase noise
Theoretical expressions for analyzing the refractive-index sensitivity of the hybrid optical fiber Fabry-Pérot sensor is developed. Influence of the experimental parameters on the measurement sensitivity is discussed. Hybrid optical fiber Fabry-Pérot sensor is fabricated by chemically etching a graded-index multimode fiber (GI-MMF), fusion splicing it into a single mode fiber, and cleaving the GI-MMF. The fringe contrast exceeds 30 dB and the corresponding measurement sensitivity of refractive index is about 45 dB per refraction index unit. Experimental results are in good agreement with the theoretical ones. It is indicated by the numerical simulations that the performance of this kind of sensor can be further improved.