Single-state high-beam-quality XeCl laser with a phase-conjugate Brillouin mirror

A single-stage high-beam-quality XeCl laser, consisting of an oscillator and a double-pass amplifier with a phase-conjugate Brillouin mirror with no optical coupling between the oscillator and the amplifier, is discussed. Maximum output energy of 20 mJ with a pulse duration of 13 ns full width at half maximum has been obtained with a 0.0015-AA (469-MHz) linewidth, 1.2*diffraction-limited beam divergence from a circular 8-mm diameter beam.<
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