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Optics Communications

Analysis of geometries for efficient orthogonal-pump four-wave mixing in inverted Nd: YAG

Graham J. Crofts, R.P.M. Green, Michael J. Damzen

Published May 1, 1994• 7 citations
Publisher
DOI
10.1016/0030-4018(94)90362-x

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Degenerate four-wave mixing in the saturable gain of a flash-lamp-pumped Nd:YAG amplifier has been investigated. Three different geometries are examined in which the probe beam experiences (a) one pass, (b) two passes, and (c) four passes of the four-wave interaction region. It is found that multipassing the gain medium has a dramatic effect on the efficiency of the process, with a phase-conjugate reflectivity of 2500 and a conjugate energy extraction efficiency of greater than 200% demonstrated.