A single-frequency Ho:Tm:YLF laser, operating at an eye-safe wavelength of 2 μm, 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.
© 2000 Optical Society of America
(140.3580) Lasers and laser optics : Lasers, solid-state
(280.1910) Remote sensing and sensors : DIAL, differential absorption lidar
(280.3640) Remote sensing and sensors : Lidar
(300.6380) Spectroscopy : Spectroscopy, modulation
Grady J. Koch, Amin N. Dharamsi, Colleen M. Fitzgerald, and John C. McCarthy, "Frequency Stabilization of a Ho:Tm:YLF Laser to Absorption Lines of Carbon Dioxide," Appl. Opt. 39, 3664-3669 (2000)