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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 24 — Dec. 2, 2013
  • pp: 29269–29276

Intensity-demodulated fiber-ring laser sensor system for acoustic emission detection

Ming Han, Tongqing Liu, Lingling Hu, and Qi Zhang  »View Author Affiliations


Optics Express, Vol. 21, Issue 24, pp. 29269-29276 (2013)
http://dx.doi.org/10.1364/OE.21.029269


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Abstract

We theoretically and experimentally demonstrate a fiber-optic ultrasonic sensor system based on a fiber-ring laser whose cavity consisting of a regular fiber Bragg grating (FBG) and a tunable optical band-pass filter (TOBPF). The FBG is the sensing element and the TOBPF is used to set the lasing wavelength at a point on the spectral slope of the FBG. The ultrasonic signal is detected by the variations of the laser output intensity in response to the cold-cavity loss modulations from the ultrasonically-induced FBG spectral shift. The system demonstrated here has a simple structure and low cost, making it attractive for acoustic emission detection in structure health monitoring.

© 2013 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings
(060.3510) Fiber optics and optical communications : Lasers, fiber

ToC Category:
Sensors

History
Original Manuscript: October 10, 2013
Manuscript Accepted: November 2, 2013
Published: November 18, 2013

Citation
Ming Han, Tongqing Liu, Lingling Hu, and Qi Zhang, "Intensity-demodulated fiber-ring laser sensor system for acoustic emission detection," Opt. Express 21, 29269-29276 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-24-29269


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References

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