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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 4 — Feb. 1, 2008
  • pp: 504–511

Design and characteristics of refractive index sensor based on thinned and microstructure fiber Bragg grating

Xue-Feng Huang, Zhe-Min Chen, Li-Yang Shao, Ke-Fa Cen, De-Ren Sheng, Jun Chen, and Hao Zhou  »View Author Affiliations

Applied Optics, Vol. 47, Issue 4, pp. 504-511 (2008)

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A refractive index sensor based on the thinned and microstructure fiber Bragg grating (ThMs-FBG) was proposed and realized as a chemical sensing. The numerical simulation for the reflectance spectrum of the ThMs-FBG was calculated and the phase shift down-peak could be observed from the reflectance spectrum. Many factors influencing the reflectance spectrum were considered in detail for simulation, including the etched depth, length, and position. The sandwich-solution etching method was utilized to realize the microstructure of the ThMs-FBG, and the photographs of the microstructure were obtained. Experimental results demonstrated that the reflectance spectrum, phase shift down-peak wavelength, and reflected optical intensity of the ThMs-FBG all depended on the surrounding refractive index. However, only the down-peak wavelength of the ThMs-FBG changed with the surrounding temperature. Under the condition that the length and cladding diameter of the ThMs-FBG microstructure were 800 and 14 μ m , respectively, and the position of the microstructure of the ThMs-FBG is in the middle of grating region, the refractive index sensitivity of the ThMs-FBG was 0.79   nm ∕refractive index unit with the wide range of 1.33–1.457 and a high resolution of 1.2 × 10 3 . The temperature sensitivity was 0.0103 nm / ° C , which was approximately equal to that of common FBG.

© 2008 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(280.4788) Remote sensing and sensors : Optical sensing and sensors
(280.5715) Remote sensing and sensors : Refractivity profiles

ToC Category:
Remote Sensing and Sensors

Original Manuscript: July 30, 2007
Revised Manuscript: October 23, 2007
Manuscript Accepted: November 25, 2007
Published: January 23, 2008

Xue-Feng Huang, Zhe-Min Chen, Li-Yang Shao, Ke-Fa Cen, De-Ren Sheng, Jun Chen, and Hao Zhou, "Design and characteristics of refractive index sensor based on thinned and microstructure fiber Bragg grating," Appl. Opt. 47, 504-511 (2008)

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