Simultaneous observation of photobleaching and photorefractive effects in germanium-doped optical fibers
- 1 March 1991
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 3 (3) , 244-246
- https://doi.org/10.1109/68.79768
Abstract
Photobleaching and photorefractive effects caused by intense pulsed laser irradiation at 532 nm have been observed simultaneously in a germanium-doped monomode fiber. A decrease of up to 4.1*10/sup -4/ in the refractive index of the core at 633 nm was inferred from the change in the radiation pattern of a probe beam and also from the change in the cutoff wavelength of the LP/sub 11/ mode. The effect is attributed to the bleaching of preexisting Ge(1) color centers in the fiber.Keywords
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