Noncritically phase matched mid-infrared generation in AgGaSe/sub 2/

Abstract

A tunable mid-infrared optical parametric oscillator has been demonstrated using a noncritically phase matched AgGaSe/sub 2/ crystal with pump wavelength tuning. Average power experiments have generated several hundred milliwatts of 2.63 and 3.71 /spl mu/m radiation using a high-repetition-rate, multiwatt 1.54 /spl mu/m pump source. Interferometric measurements of the AgGaSe/sub 2/ crystal during operation indicated only minor thermal lensing.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>