High-energy single-longitudinal mode nearly diffraction-limited optical parametric source with 3 MHz frequency stability for CO2 DIAL.
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.
Raybaut
Myriam
M
ONERA, The French Aerospace Lab, Chemin de la Hunière, Palaiseau, France. myriam.raybaut@onera.fr
Schmid
Thomas
T
Godard
Antoine
A
Mohamed
Ajmal K
AK
Lefebvre
Michel
M
Marnas
Fabien
F
Flamant
Pierre
P
Bohman
Axel
A
Geiser
Peter
P
Kaspersen
Peter
P