Abstract
Abstract Difference frequency mixing in KTiOASO4 (KTA) of an injection- seeded pulsed Ti-sapphire ring laser and a Q-switched Nd:YAG laserhas produced high power output from 2.65 jim to 5.3 tm.The mid-infrared region is of particular interest in molecular spectroscopy, infrared photochemistry and atmospheric sensingapplications. Many important molecules have strong transitionsspanning this spectral region. The new crystal KTA has optical transmission that spans from the uv at 0.35 im to the ir beyond 5.3tm. This makes KTA very attractive for mid-ir generation. Recently,large single domain KTA crystals are successfully produced usingboth the flux technique1 and the hydrothermal growth technique.2 Crystals 15 mm long and 5 mm2 aperture and of good optical property are commercially available. Parametric oscillation with flux-grown material have been reported for the generation of nanosecond3 and femtosecond4 pulses in the 1.2-2.0 im region. In this paper I describe the generation of continuously tunable
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