A transient model of degenerate four-wave mixing in saturable amplifiers is developed for calculation of the phase-conjugate reflectivity in the weak-probe-beam limit. Our model takes into account the laser amplification of all the interacting beams together with the wave-mixing process between the two counterpropagating pump waves. Experimental investigations are made in a flash-lamp-pumped Nd:YAG amplifier with nanosecond pulses at 1.06 μm. A reflectivity of 22% is achieved when all the waves interfere within the laser medium.
© 1994 Optical Society of America
Original Manuscript: December 16, 1993
Published: June 15, 1994
A. Brignon, J. Raffy, and J.-P. Huignard, "Transient degenerate four-wave mixing in a saturable Nd:YAG amplifier: the effect of pump-beam propagation," Opt. Lett. 19, 865-867 (1994)