Heating a photo-darkened Ytterbium fiber causes a recovery in spectral transmission to the pre-darkened state. Exposure to H$_2$ at high temperatures causes a permanent change in the visible transmission identical to that caused by photo-darkening.
© 2006 Optical Society of America
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(260.0260) Physical optics : Physical optics
(260.5130) Physical optics : Photochemistry
J. Jasapara, M. Andrejco, D. DiGiovanni, and R. Windeler, "Effect of Heat and H2 Gas on the Photo-Darkening of Yb+3 Fibers," in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies, Technical Digest (CD) (Optical Society of America, 2006), paper CTuQ5.
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