Abstract

We report on a 2.05μm nanosecond master oscillator power amplifier optical parametric source for CO2 differential-absorption lidar. The master oscillator consists of an entangled-cavity nanosecond optical parametric oscillator based on a type II periodically poled lithium niobate crystal that provides highly stable single-longitudinal-mode radiation. The signal emission is amplified by a multistage parametric amplifier to generate up to 11mJ in a nearly diffraction-limited beam with an M2 quality factor of 1.5 while maintaining single-longitudinal-mode emission with a frequency stability better than 3MHz rms. This approach can be readily applied to the detection of various greenhouse gases.

© 2009 Optical Society of America

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