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Conference on Lasers and Electro-Optics

Continuous-wave and pulsed phase conjugation in Nd:YVO/sub 4/

A. Brignon, J.-P. Huignard

Published Jan 1, 1996• 0 citations
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Abstract

Summary form only given. We have demonstrated efficient cw DFWM in a Nd:YVO/sub 4/ amplifier. The use of long pulses provides an interesting link between the short pulse and the cw regimes. Transient peak reflectivities have been clearly shown at high intensities. Nd:YVO/sub 4/ combined with a high-power cw diode pumping could perform (as demonstrated in the pulsed regime) compact, efficient and all-solid-state cw phase conjugators for the near-IR.

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Temporal analysis of pulsed phase conjugation in laser amplifiers: application to Nd:YVO_4

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Phase conjugation by saturable-gain degenerate four-wave mixing in solid state laser media

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Phase conjugation in a continuous-wave diode-pumped Nd:YVO 4 laser

A. Brignon, L. Loiseau, Christian Larat +2 more

Applied Physics B•Aug 1, 1999•16 citations
Summary form only given. We have demonstrated efficient cw DFWM in a Nd:YVO/sub 4/ amplifier. The use of long pulses provides an interesting link between the short pulse and the cw regimes. Transient peak reflectivities have been clearly shown at high intensities. Nd:YVO/sub 4/ combined with a high-power cw diode pumping could perform (as demonstrated in the pulsed regime) compact, efficient and all-solid-state cw phase conjugators for the near-IR.
The theory of phase conjugation in laser amplifiers by saturable-gain degenerate four-wave mixing with copolarized beams is developed for pulses of arbitrary temporal shape and duration in the limit of a weak signal beam. The influence of the input pulse’s characteristics (energy, temporal pulse shape, duration) on the phase-conjugate reflectivity and on the conjugate pulse shape is analyzed. A sharp instantaneous peak of phase-conjugate reflectivity is predicted at high intensities of the four-wave mixing beams. This effect is experimentally demonstrated at λ0 = 1064 nm in a Nd:YVO4 amplifier pumped by a cw Ti:sapphire laser. A transient peak reflectivity of R ∼ 50% is thus obtained, corresponding to an enhancement of 1.6× compared with the maximum steady-state reflectivity. The experimental results and the theoretical predictions are in good agreement.