Stabilized Fiber-Optic Fabry–Perot Acoustic Sensor Based on Improved Wavelength Tuning Technique

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Abstract
A fiber-optic Fabry-Perot acoustic sensor system based on an improved wavelength tuning stabilization technique is presented. The stabilization is achieved by wavelength periodically tuning using a tunable distributed feedback laser. The performance of the developed sensor system was verified by tests. Experimental results demonstrate that the sensitivity, the dynamic range, and the min detectable sound pressure level (SPL) are 92 mV/Pa, 96 dB, and 7 dB-SPL at 1 kHz, respectively. The sensor is suitable for weak acoustic sensing.
Funding Information
  • Natural Science Foundation, Chongqing City, China (cstc2016jcyjA2063, cstc2013icyjA40004)
  • Scientific and Technological Research Program of Chongqing Municipal Education Commission (KJ1600418)
  • Special Theme Projects on LCD Industrial Generic Technology Innovation, Chongqing, China (cstc2015zdcy-ztzx40003)
  • Science Research Funds of Chongqing Municipal Education Commission (KJ1500436)
  • Key Project of Foundation and Advanced Technology Research Project of Chongqing (cstc2015jcyjB0016)
  • Foundation and Advanced Technology Research Project of Chongqing (cstc2016jcyjA0389)
  • Natural Science Foundation of Chongqing Science and Technology Commission (cstc2015jcyjA0554)
  • Scientific Research Foundation for the Returned Overseas Chinese Advanced Technology Research Project of CQ CSTC (cstc2015jcyjB0358)

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