15 September 1995 CO2 laser-based trace gas detection: a nonintrusive ammonia monitor with subsecond response time
Author Affiliations +
Proceedings Volume 2505, Lidar and Atmospheric Sensing; (1995); doi: 10.1117/12.219646
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany
We describe a method to increase the tuning rate of a grating-tuned cw CO2 laser by using an intra-cavity ZnSe wedge as a tuning element. The wedge is mounted on a galvo element directly in front of the grating which forms one of the cavity mirrors. Its orientation determines the angle of incidence of the laser radiation on the grating, and can be adjusted thorugh the voltage applied to the galvo element. This allows fast, accurate switching between different laser lines at a switching rate of up to 30 Hz. This technique is useful for on-line background absorption correction in trace gas monitoring and for multicomponent analysis of gas samples.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Frans J. M. Harren, Hugo S. M. de Vries, Naim Dam, R. van Haeren, J. Reuss, David H. Parker, "CO2 laser-based trace gas detection: a nonintrusive ammonia monitor with subsecond response time", Proc. SPIE 2505, Lidar and Atmospheric Sensing, (15 September 1995); doi: 10.1117/12.219646; https://doi.org/10.1117/12.219646

Carbon dioxide lasers


Gas lasers



Carbon dioxide

Laser beam diagnostics


CO2 Probe Laser With Rapid Wavelength Switching
Proceedings of SPIE (October 20 1977)
Tunable two-color CW CO2-CO laser
Proceedings of SPIE (June 16 2004)
Frequency Stabilization Of CO2 Lasers: Some Applications
Proceedings of SPIE (March 31 1983)
Optical Pumping Of The v3 + v4 Band Of The...
Proceedings of SPIE (November 13 1980)

Back to Top