Efficient photobleaching of 390-nm luminescence in germanosilicate preforms by the third harmonic of a Nd:YAG laser
- 1 May 1996
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 21 (9) , 635-637
- https://doi.org/10.1364/ol.21.000635
Abstract
Permanent photobleaching of blue luminescence with a maximum at ~390 nm in Ge-doped fiber preforms by exposure to the third harmonic (354 nm) of a Nd:YAG laser has been observed. The experimental results show that photodestruction of a germanium oxygen-deficient center can occur without photoionization.Keywords
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