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Chinese Optics Letters

Chinese Optics Letters


  • Vol. 2, Iss. 7 — Jul. 10, 2004
  • pp: 393–395

Measuring vibration by using fiber Bragg grating and demodulating it by blazed grating

Xiaojin Guo, Zongmin Yin, and Ning Song  »View Author Affiliations

Chinese Optics Letters, Vol. 2, Issue 7, pp. 393-395 (2004)

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A method of measuring vibration by using fiber Bragg grating (FBG) and demodulating the spectrum by blazed grating is introduced. The sensor system is made of a simple supported beam with a FBG adhered to its upper surface. A blazed grating is used to demodulate the changing spectrum that is got from the sensor system, and a line charge-coupled device (CCD) is used to accept the diffraction spectrum. Through analyzing the number of the CCD's pixels, we can get the amplitude of vibration and the change of the temperature. The experimental results show that the vibration amplitude of the exciter matches the detected signal under the stable frequency. The temperature shift and vibration signal are also successfully separated.

© 2005 Chinese Optics Letters

OCIS Codes
(060.2300) Fiber optics and optical communications : Fiber measurements
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology

Xiaojin Guo, Zongmin Yin, and Ning Song, "Measuring vibration by using fiber Bragg grating and demodulating it by blazed grating," Chin. Opt. Lett. 2, 393-395 (2004)

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