Nonlinear transmission and color-center dynamics in germanosilicate fibers at 420–540 nm
- 1 November 1988
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 13 (11) , 1023-1025
- https://doi.org/10.1364/ol.13.001023
Abstract
We report evidence in support of the view that induced loss and nonlinear transmission in pure germanosilicate fibers at blue-green wavelengths are governed by the formation (through two-photon absorption), spontaneous and stimulated transformation, and bleaching (through single-photon events) of Ge(1), Ge(2), and Ge(3) color centers. Using a tunable pulsed-dye laser, the excitation spectrum of the induced absorption, its spectral attenuation, and the effects of Ge concentration and thermal annealing are investigated.Keywords
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