Simultaneous observation of photobleaching and photorefractive effects in germanium-doped optical fibers

Simultaneous observation of photobleaching and photorefractive effects in germanium-doped optical fibers

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 patter...

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Veröffentlicht in:IEEE photonics technology letters 1991-03, Vol.3 (3), p.244-246
Hauptverfasser: Kanellopoulos, S.E., Handerek, V.A., Jamshidi, H., Rogers, A.J.
Format: Artikel
Sprache:eng
Schlagworte:
Bleaching
Fiber lasers
Laser beams
Optical fibers
Optical pulses
Photobleaching
Photorefractive effect
Probes
Refractive index
Solid lasers
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Zusammenfassung: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.< >
ISSN:1041-1135
1941-0174
DOI:10.1109/68.79768