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Annual Meeting Optical Society of America

Expanding the probe-acceptance-angle range for phase conjugation by Brillouin-enhanced four-wave mixing by using pump-frequency compensation

John R. Ackerman, Paul S. Lebow

Published Jan 1, 1993• 0 citations
Publisher

Abstract

The phase mismatch that drives energy transfer among the weak probe input, pump beams, and amplified phase conjugate output in high reflectivity Brillouin enhanced four wave mixing is determined by both spectral and spatial factors.
DOI
10.1364/oam.1993.mii.4

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The results of an experimental investigation of a new geometry for producing phase conjugation by Brillouin-enhanced four-wave mixing are presented. In this geometry, the four-wave mixing medium is carbon disulfide, and the backward-going pump wave is created from the transmitted forward-going pump wave by stimulated Brillouin scattering (SBS) in glycerol. The two pump waves are hence phase conjugates of each other, and the quality of the phase-conjugation process is not degraded even by the use of an aberrated pump wave. The probe wave is created by SBS in carbon disulfide, which has a Brillouin frequency half that of glycerol, and the conjugate wave is therefore generated at the same frequency as the probe. Since the pump and signal waves differ in frequency by the Brillouin frequency of the carbon disulfide four-wave mixing medium, high reflectivities (approximately 2000%) are obtained as a result of Brillouin resonance enhancement.
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