Frequency Stabilization of a Ho:Tm:YLF Laser to Absorption Lines of Carbon Dioxide.
A single-frequency Ho:Tm:YLF laser, operating at an eye-safe wavelength of 2 mum, has been developed with tuning characteristics optimized for spectroscopy of absorption features. The laser frequency was stabilized to three different absorption lines of carbon dioxide by a wavelength modulation technique. Long-term frequency drift has been eliminated from the laser, and shorter-term jitter has been reduced to within 13.5 MHz of the absorption line center. This stabilized laser is an ideal injection seed source for a differential absorption lidar system for measurement of atmospheric gases.
Koch
G J
GJ
Dharamsi
A N
AN
Fitzgerald
C M
CM
McCarthy
J C
JC