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Nonlinear transmission and colour-centre dynamics in germanosilicate fibres at 420-540 nm

By L.J. Poyntz-Wright, M.E. Fermann and P.St.J. Russell


We report evidence in support of the view that induced loss and non-linear transmission in pure germanosilicate fibers at blue/green wavelengths are governed by the formation (via two-photon absorption), spontaneous and stimulated transformation and bleaching (via single-photon events) of Ge(1), Ge(2) and Ge(3) colour-centres. Using a tunable pulsed dye laser, the excitation spectrum of the induced absorption, its spectral attenuation and the effects of germania concentration and thermal annealing are investigated

Topics: TK, QC
Year: 1988
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Provided by: e-Prints Soton

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