Self-focusing in photorefractive two-wave mixing

Optics Letters
M VaupelR Dykstra

Abstract

Self-focusing and self-defocusing of light in two-wave mixing are investigated experimentally. Amplification and self-focusing are measured as functions of the frequency shift between signal and pump beams. A frequency dependence is found in Kramers-Kronig form, as is plausible by the analogy of photorefractive amplification and laser amplification. Reversal of the external dc field on the material or a change in the frequency shift between the signal and pump beams is found to change self-focusing to self-defocusing.

Citations

Nov 23, 2007·Optics Letters·Oren CohenSerguey Odoulov
Sep 13, 2002·Physical Review Letters·Oren CohenSerguey Odouov
Oct 4, 2003·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Jinsong Liu
Aug 29, 2003·Optics Letters·José R SalgueiroYuri S Kivshar
Jan 5, 2006·Optics Letters·Inbal FriedlerMordechai Segev

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