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ZHOU Guang-li, E Shu-lin, DENG Wen-yuan. Optical fiber temperature sensors based on bending loss[J]. LASER TECHNOLOGY, 2009, 33(1): 46-49.
Citation: ZHOU Guang-li, E Shu-lin, DENG Wen-yuan. Optical fiber temperature sensors based on bending loss[J]. LASER TECHNOLOGY, 2009, 33(1): 46-49.

Optical fiber temperature sensors based on bending loss

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  • Received Date: November 20, 2007
  • Revised Date: January 22, 2008
  • Published Date: February 24, 2009
  • In order to deduce that the bending loss was a function of curvature radius and temperature,WKB method was used to solve the number of modes of non-uniform straight fibers, the effective refractive index, the cut-off of propagation constant of bending fibers and thermo-optic effect of fibers were introduced to the number of modes of non-uniform straight fiber also.Choosing multimode graded-index optical fibers to get a temperature sensor, the sensitivity of the sensor was 0.1/℃ and the temperature sensing range was 10℃~70℃.The results indicate that the smaller the curvature radius and the temperature, the bigger the bending loss.Bending loss can be used to measure the temperature.
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