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Sensitivity analysis of hybrid fiber Fabry-Pérot refractive-index sensor

Gong Yuan Guo Yu Rao Yun-Jiang Zhao Tian Wu Yu Ran Zeng-Ling

Sensitivity analysis of hybrid fiber Fabry-Pérot refractive-index sensor

Gong Yuan, Guo Yu, Rao Yun-Jiang, Zhao Tian, Wu Yu, Ran Zeng-Ling
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  • Abstract views:  4258
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  • Received Date:  02 August 2010
  • Accepted Date:  04 August 2010
  • Published Online:  15 June 2011

Sensitivity analysis of hybrid fiber Fabry-Pérot refractive-index sensor

  • 1. Key Laboratory of Optical Fiber Sensing and Communications of Ministry of Education, University of Electronic Science and Technology of China, Chengdu 611731, China

Abstract: 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.

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