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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 45, Iss. 13 — May. 1, 2006
  • pp: 2935–2939

Simultaneous measurement of temperature and pressure by a single fiber Bragg grating with a broadened reflection spectrum

Tuan Guo, Xueguang Qiao, Zhenan Jia, Qida Zhao, and Xiaoyi Dong  »View Author Affiliations


Applied Optics, Vol. 45, Issue 13, pp. 2935-2939 (2006)
http://dx.doi.org/10.1364/AO.45.002935


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Abstract

Simultaneous measurement of temperature and pressure with a single fiber Bragg grating (FBG) based on a broadened reflection spectrum is proposed and experimentally demonstrated. A novel double-hole structure of a cantilever beam is designed, and a FBG is affixed on the nonuniform strain area of the cantilever beam. The Bragg reflection bandwidth is sensitive to the spatially gradient strain but is free from the spatially uniform temperature. The wavelength peak shift and the bandwidth broadening of the FBG with a change of temperature and pressure allow for simultaneous discrimination between the temperature and the pressure effects. Standard deviation errors of 1.4 ° C   and   1 .8   kPa were obtained with temperature and pressure ranges of 20 ° C 100   ° C and 0 80   kPa , respectively. This novel and low-cost sensor approach has considerable potential applications for temperature-insensitive strain measurement.

© 2006 Optical Society of America

OCIS Codes
(060.2300) Fiber optics and optical communications : Fiber measurements
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(230.1150) Optical devices : All-optical devices

ToC Category:
Performance Analysis

History
Original Manuscript: March 31, 2005
Revised Manuscript: August 3, 2005
Manuscript Accepted: August 25, 2005

Citation
Tuan Guo, Xueguang Qiao, Zhenan Jia, Qida Zhao, and Xiaoyi Dong, "Simultaneous measurement of temperature and pressure by a single fiber Bragg grating with a broadened reflection spectrum," Appl. Opt. 45, 2935-2939 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-13-2935


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