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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Editor: Zhizhan Xu
  • Vol. 10, Iss. 5 — May. 1, 2012
  • pp: 050603–

Temperature-independent refractive index measurement based on Fabry-Perot fiber tip sensor modulated by Fresnel reflection

Yue Ma, Xueguang Qiao, Tuan Guo, Ruohui Wang, Jing Zhang, Yinyan Weng, Qiangzhou Rong, Manli Hu, and Zhongyao Feng  »View Author Affiliations


Chinese Optics Letters, Vol. 10, Issue 5, pp. 050603- (2012)


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Abstract

A simple fiber tip sensor for refractive index (RI) measurement based on Fabry-Perot (FP) interference modulated by Fresnel reflection is proposed and demonstrated. The sensor head consists of an etching-induced micro air gap near the tip of a single-mode fiber. The microgap and the fiber tip function as two reflectors to form a FP cavity. The external RI can be unambiguously measured by monitoring the fringe contrast of the interference pattern from the reflection spectrum. The experimental results show that the proposed sensor achieves temperature-independent RI measurement with good linear response. The proposed sensor achieves a high RI resolution of up to 3.4 \times 10?5 and has advantages of low cost and easy fabrication.

© 2012 Chinese Optics Letters

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.2230) Instrumentation, measurement, and metrology : Fabry-Perot

ToC Category:
Fiber Optics and Optical Communications

Citation
Yue Ma, Xueguang Qiao, Tuan Guo, Ruohui Wang, Jing Zhang, Yinyan Weng, Qiangzhou Rong, Manli Hu, and Zhongyao Feng, "Temperature-independent refractive index measurement based on Fabry-Perot fiber tip sensor modulated by Fresnel reflection," Chin. Opt. Lett. 10, 050603- (2012)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-10-5-050603

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