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Spatial characterization of strong fiber Bragg gratings using thermal chirp and optical-frequency-domain reflectometry

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1 Author(s)
Waagaard, O.H. ; Dept. of Phys. Electron., Norwegian Univ. of Sci. & Technol., Norway

A method that can spatially characterize gratings with grating strength |κ|L up to 10 is presented. The grating is thermally chirped, which increases the transmissivity through the grating. The complex reflectivity spectrum is measured using optical-frequency-domain reflectometry, and the spatial profile is reconstructed using the time-domain layer-peeling algorithm. The spatial profiles of a uniform grating with grating strength |κ|L = 8.25 (-66-dB minimum transmissivity) and a distributed-feedback fiber laser grating with grating strength |κ|L = 7.5 are accurately reconstructed from the measured complex reflection spectrum.

Published in:

Lightwave Technology, Journal of  (Volume:23 ,  Issue: 2 )

Date of Publication:

Feb. 2005

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