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Strong Bragg Gratings in Highly Photosensitive Photo-Thermo-Refractive-Glass Optical Fiber

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11 Author(s)
Hofmann, P. ; Coll. of Opt. Sci., Univ. of Arizona, Tucson, AZ, USA ; Amezcua-Correa, R. ; Antonio-Lopez, E. ; Ott, D.
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A new type of photosensitive fiber is demonstrated. Long lengths (>;100 m) of coreless optical fiber are fabricated from highly photosensitive photo-thermo-refractive glass. A minimum loss of <;2 dB/m is measured. A holographic technique using low power near-UV two-beam interference patterns is applied to record strong and robust Bragg gratings inside the fiber. The gratings show no degradation when heated up to 425 °C for several hours.

Published in:

Photonics Technology Letters, IEEE  (Volume:25 ,  Issue: 1 )