title: High-energy single-longitudinal mode nearly diffraction-limited optical parametric source with 3 MHz frequency stability for CO2 DIAL.
abstract: We report on a 2.05 microm 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 11 mJ in a nearly diffraction-limited beam with an M2 quality factor of approximately 1.5 while maintaining single-longitudinal-mode emission with a frequency stability better than 3 MHz rms. This approach can be readily applied to the detection of various greenhouse gases.
authors: ONERA, The French Aerospace Lab, Chemin de la Hunière, Palaiseau, France. myriam.raybaut@onera.fr
authors: Myriam
authors: M
authors: Raybaut
authors: Thomas
authors: T
authors: Schmid
authors: Antoine
authors: A
authors: Godard
authors: Ajmal K
authors: AK
authors: Mohamed
authors: Michel
authors: M
authors: Lefebvre
authors: Fabien
authors: F
authors: Marnas
authors: Pierre
authors: P
authors: Flamant
authors: Axel
authors: A
authors: Bohman
authors: Peter
authors: P
authors: Geiser
authors: Peter
authors: P
authors: Kaspersen