Recent developments in the application of optical frequency domain reflectometry to distributed Bragg grating sensing

Brooks A. Childers; Timothy L. Brown; Jason P. Moore; Karen H. Wood

doi:10.1117/12.456077

14 February 2002 Recent developments in the application of optical frequency domain reflectometry to distributed Bragg grating sensing

Brooks A. Childers, Timothy L. Brown, Jason P. Moore, Karen H. Wood

Author Affiliations +

Proceedings Volume 4578, Fiber Optic Sensor Technology and Applications 2001; (2002) https://doi.org/10.1117/12.456077
Event: Environmental and Industrial Sensing, 2001, Boston, MA, United States

Abstract

This paper presents recent developments in the use of optical frequency domain reflectometry (OFDR) to measure engineering parameters at thousands of locations along optical sensing fibers where weakly reflecting Bragg gratings have been photoetched. Application of the sensing fibers outside of the development lab has revealed several areas for improvement. Some of the problems encountered include polarization fading, non-linear laser tuning, and sensor calibration. This paper considers the use of polarization diversity detection and monitoring of the laser tuning characteristics to provide a more robust OFDR system for both sensor calibration and measurement. Possible modifications to the system are reported along with calibration measurements for quantifying the effects of polarization fading in the sensing fiber.

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Brooks A. Childers, Timothy L. Brown, Jason P. Moore, and Karen H. Wood "Recent developments in the application of optical frequency domain reflectometry to distributed Bragg grating sensing", Proc. SPIE 4578, Fiber Optic Sensor Technology and Applications 2001, (14 February 2002); https://doi.org/10.1117/12.456077

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