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

Ming Han, Tongqing Liu, Lingling Hu, Qi Zhang

Research output: Contribution to journalArticle

38 Citations (Scopus)

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 ultrasonicallyinduced 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.

Original languageEnglish (US)
Pages (from-to)29269-29276
Number of pages8
JournalOptics Express
Volume21
Issue number24
DOIs
StatePublished - Dec 2 2013

Fingerprint

acoustic emission
ring lasers
Bragg gratings
fiber lasers
fibers
sensors
bandpass filters
ultrasonics
laser outputs
laser cavities
health
lasing
fiber optics
slopes
costs
modulation
cavities
shift
wavelengths

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Intensity-demodulated fiber-ring laser sensor system for acoustic emission detection. / Han, Ming; Liu, Tongqing; Hu, Lingling; Zhang, Qi.

In: Optics Express, Vol. 21, No. 24, 02.12.2013, p. 29269-29276.

Research output: Contribution to journalArticle

Han, Ming ; Liu, Tongqing ; Hu, Lingling ; Zhang, Qi. / Intensity-demodulated fiber-ring laser sensor system for acoustic emission detection. In: Optics Express. 2013 ; Vol. 21, No. 24. pp. 29269-29276.
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