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Optics Letters

Polarization-resolved coherent transient beam combination in optical Kerr media

Daniel N. Rogovin, Tracy E. Dutton, Peter M. Rentzepis, T. P. Shen, James F. Scholl

Published Oct 15, 1990• 5 citations
Publisher

Abstract

We have observed transient, coherent beam combination by degenerate two-wave mixing of frequency-doubled Nd:YAG picosecond laser pulses in carbon disulfide, using a circularly polarized pump wave and a linearly polarized probe beam. The important role of beam polarization is observed, and its part in energy transfer is discussed. A theory that treats polarization effects in transient two-wave mixing is presented, applied to the carbon disulfide experiments, and found to be in excellent agreement with the data.

DOI
10.1364/ol.15.001132

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We have observed transient, coherent beam combination by degenerate two-wave mixing of frequency-doubled Nd:YAG picosecond laser pulses in carbon disulfide, using a circularly polarized pump wave and a linearly polarized probe beam. The important role of beam polarization is observed, and its part in energy transfer is discussed. A theory that treats polarization effects in transient two-wave mixing is presented, applied to the carbon disulfide experiments, and found to be in excellent agreement with the data.
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We study theoretically the properties of transient degenerate four-wave mixing in an isotropic, homogeneously saturable gain medium with interacting beams of arbitrary strength and polarization state. In particular we investigate the ability of the interaction to exhibit vectorial phase conjugation when orthogonally circularly polarized pump beams are used. This mechanism allows the correction of both phase and polarization distortions introduced to an optical beam. Numerical simulations are compared with experiments that use a flashlamp-pumped Nd3+:YAG amplifier and demonstrate good vector phase-conjugate fidelity for both weak and strong probe beams of arbitrary polarization state.
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