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Le Journal de Physique Colloques

SOME THOUGHTS AND OBSERVATIONS OF PHASE CONJUGATION IN THE ULTRAVIOLET

B. J. Feldman, Irving J. Bigio, Robert A. Fisher, Michael Slatkine

Published Mar 1, 1983• 0 citations
Publisher

Abstract

We report on ultraviolet phase conjugation studies using KrF, XeF, and quadrupled Nd : YAG lasers. Processes studied include stimulated Brillouin scattering, stimulated Raman scattering, and degenerate four-wave mixing. In some cases phase conjugate efficiencies of greater than 80% are observed. Implications and applications of these phenomena will be discussed.

DOI
10.1051/jphyscol:1983203

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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Nov 20, 1985•0 citations
We report on ultraviolet phase conjugation studies using KrF, XeF, and quadrupled Nd : YAG lasers. Processes studied include stimulated Brillouin scattering, stimulated Raman scattering, and degenerate four-wave mixing. In some cases phase conjugate efficiencies of greater than 80% are observed. Implications and applications of these phenomena will be discussed.
We report here the first observations of phase conjugation of KrF laser radiation at 2486Å. The laser employed was an injection-locked, unstable resonator, KrF double-discharge with 200 mJ, 20 ns output in a <0.1 Å bandwidth (coherence length ≈1 cm) nearly diffraction-limited beam.1 Using this laser three different nonlinear processes were investigated as to their phase conjugation and/or image retention properties: degenerate four-wave mixing, stimulated Brillouin scattering, and stimulated Raman scattering.
Optical phase conjugation is concerned with the use of nonlinear optical effects to precisely reverse the direction of propagation of each plane wave in an arbitrary beam of light. This causes the return beam to exactly retrace the path of the incident beam, leading to many applications of automatic pointing and tracking (even in the presence of an inhomogeneous medium). The main goals of this course are familiarization with how each of the many nonlinear optical effects gives rise to a phase conjugate signal, and understanding and appreciation of the many potential applications for optical phase conjugation. Conjugation techniques involving Kerr-like degenerate four-wave mixing, resonant degenerate four-wave mixing, stimulated Brillouin scattering, photorefractive effects, surface phenomena, and others will be carefully reviewed. Applications of particular importance to this course will include distortion correction, pointing, tracking, laser-resonator design, optical information processing, etc. Throughout the course, key references will be identified for those wishing to pursue any topic more vigorously.