Low-Coherent WDM Reflectometry for Accurate Fiber Length Monitoring
A fiber-optic low-coherent reflectometer was developed to accurately monitor fiber length variation. A large length-coverage range was obtained by using a fiber Bragg grating array in a wavelength-division-multiplexing configuration. The polarization mismatch-induced signal fading was eliminated by applying a polarization spreading technique at the optical receiver and, therefore, no active polarization adjustment was necessary for long-term measurement.
R. Hui et al., "Low-Coherent WDM Reflectometry for Accurate Fiber Length Monitoring," IEEE Photonics Technology Letters, vol. 15, no. 1, pp. 96-98, Institute of Electrical and Electronics Engineers (IEEE), Jan 2003.
The definitive version is available at http://dx.doi.org/10.1109/LPT.2002.805842
Geosciences and Geological and Petroleum Engineering
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