Abstract

A compact tunable UV laser source based on intracavity sum frequency generation in a MgO-doped periodically-poled stoichiometric lithium tantalate optical parametric oscillator is reported. UV output at an 1mW level of power over the range of 364 to 378nm with a bandwidth of 0.5nm was obtained with a crystal that has just one periodically-poled grating period. The full tuning range can be as much as 68nm, from 324 to 392nm by varying the crystal temperature from room temperature to 250°C. This will cover nearly the entire UVA range.

© 2008 Optical Society of America

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