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Optics Communications

Phase-conjugate reflection at arbitrary angles using TEM00 pump beams

Rick P. Trebino, Anthony E.. Siegman

Published Jan 1, 1980• 33 citations
Publisher
DOI
10.1016/0030-4018(80)90301-6

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We report for the first time a double 45°-cut mutually pumped phase conjugate mirror, which has high phase conjugate reflectivities and is highly insensitive to the alignment of the two incident beams. For example, two mutually incoherent incident beams can produce their own phase conjugate outputs when the angle between the incident beams is varied from as much as 7° to 140° and over 60% conjugate reflectivity can be obtained. Furthermore, the phase conjugate outputs are stable because the competition from the self-pumped phase conjugation can be avoided easily.
An experimental study of double-pumped phase conjugation (DPPC) in a gain medium (Nd:YAG) is presented. The input–output energy and phase conjugate reflectivity of the system was experimentally characterized, with a maximum reflectivity of R∼160 observed. A self-starting DPPC laser was also produced by use of a feedback mirror, and spatial and temporal outputs are presented. The DPPC laser produced a TEM00 spatial mode output of 113 mJ in a 20-ns single-longitudinal mode pulse at a repetition rate of 10 Hz.