NDLI: Photosensitivity of rare-earth-doped ZBLAN fluoride glasses

Content Provider	IEEE Xplore Digital Library
Author	Williams, G.M. Tsung-Ein Tsai Merzbacher, C.I. Friebele, E.J.
Copyright Year	1983
Abstract	We have performed experiments to elucidate the mechanism of photosensitivity in rare-earth-doped fluorozirconate (ZBLAN) glasses. Glasses doped with Ce, Tb, Tm, and Pr were studied. Permanent holographic gratings were written in bulk samples using 248 nm light, with the strongest gratings observed in Ce:ZBLAN. Ultraviolet (UV) induced changes in both absorption and electron spin resonance (ESR) spectra were observed. In the Ce-doped glasses, the grating formation dynamics were recorded as a function of write beam intensity and Ce concentration. The results indicate that the mechanism of photosensitivity involves color center(s) creation through a stepwise two photon excitation of a Ce ion. The color center(s) can be subsequently bleached by a single photon at 248 nm.
Sponsorship	IEEE Lasers and Electro-Optics Society Optical Society of America
Starting Page	1357
Ending Page	1362
Page Count	6
File Size	107301
File Format	PDF
ISSN	07338724
Volume Number	15
Issue Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Glass Holography Fiber gratings Optical fibers Gas lasers Paramagnetic resonance Bragg gratings Fiber lasers Solid lasers Holographic optical components
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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