Volume 44, Number 5, December I 1998
|Page(s)||592 - 598|
|Section||Classical areas of phenomenology|
|Published online||01 September 2002|
Cross-phase-modulation–induced self-focusing in parametric oscillators
Laboratoire Kastler Brossel, University P. et M. Curie - Case 74, 75252 Paris, France
2 Physikalisch-Technische Bundesanstalt - 38116 Braunschweig, Germany
Accepted: 15 October 1998
The dependence of spatial self-focusing on resonator detuning is experimentally investigated in the active medium of a photorefractive oscillator which is a parametric oscillator with narrow gain linewidth. Beam diameter of the -mode and beat frequency of the -mode and another simultaneously emitted transverse mode depend on detuning like a dispersion-shaped function. The maximum strength of self-focusing and the corresponding frequency shift are in the resonator strongly reduced with respect to single-pass wave mixing.
PACS: 42.65.Jx – Beam trapping, self-focusing, and thermal blooming / 42.60.Fc – Modulation, tuning, and mode locking / 42.65.Hw – Phase conjugation, optical mixing, and photorefractive effect
© EDP Sciences, 1998
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