Fiber-chirped grating Fabry-Perot sensor with multiple-wavelength-addressable free-spectral ranges

We report the demonstration of a fiber-chirped grating Fabry-Perot (FP) sensor with large dynamic range and high resolution surpassing that of a conventional FP sensor. The chirped grating FP sensor functions as an array of collocated FP cavities with different wavelength addressable cavity lengths...

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Bibliographic Details
Published inIEEE photonics technology letters Vol. 10; no. 7; pp. 1006 - 1008
Main Authors Koo, K.P., LeBlanc, M., Tsai, T.E., Vohra, S.T.
Format Journal Article
LanguageEnglish
Published IEEE 01.07.1998
Subjects
Capacitive sensors
Chirp
Dynamic range
Fabry-Perot
Fiber gratings
Laboratories
Optical fiber sensors
Sensor arrays
Strain measurement
Wavelength measurement
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Summary:We report the demonstration of a fiber-chirped grating Fabry-Perot (FP) sensor with large dynamic range and high resolution surpassing that of a conventional FP sensor. The chirped grating FP sensor functions as an array of collocated FP cavities with different wavelength addressable cavity lengths or free-spectral ranges. This sensor design allows large dynamic range and high resolution to be achieved in a single compact sensor head. Free-spectral range from 0.04 to 1.3 nm has been achieved. Using this device as a strain sensor, unambiguous (without fringe counting) strain measurements from 3/spl plusmn/1 μstrain (limited by probe source resolution) to 1300 μstrain have been measured.
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ISSN:1041-1135
1941-0174
DOI:10.1109/68.681299