Intensity-modulated fiber Bragg grating sensor system based on radio-frequency signal measurement

Xinyong Dong, Li Yang Shao, H. Y. Fu, Hwa Yaw Tam, Chao Lu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

38 Citations (Scopus)

Abstract

An intensity-modulated, fiber Bragg grating (FBG) sensor system based on radio-frequency (RF) signal measurement is presented. The RF signal is generated at a photodetector by two modulated optical signals reflected from the sensing FBG and a reference FBG. Wavelength shift of the sensing FBG changes intensity of the RF signal through changing the delay between the two optical signals, with temperature effect being compensated automatically by the reference FBG. It also exhibits important features including potentially high-speed measurement, low cost, and adjustable sensitivity. In the experiment, strain measurement with a maximum sensitivity of -0.34 μV/με has been achieved.
Original languageEnglish
Pages (from-to)482-484
Number of pages3
JournalOptics Letters
Volume33
Issue number5
DOIs
Publication statusPublished - 1 Mar 2008

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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