CO2 laser wavelength shifter

Michael E. Ehritz; David B. Cohn; Cynthia R. Swim

doi:10.1117/12.452772

9 January 2002 CO₂ laser wavelength shifter

Michael E. Ehritz, David B. Cohn, Cynthia R. Swim

Proceedings Volume 4484, Lidar Remote Sensing for Industry and Environment Monitoring II; (2002) https://doi.org/10.1117/12.452772
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

The CO₂ laser is well suited for detecting a number of chemicals in the 9.3 - 10.7 micrometers band. However, there are several important species that require emission at 8 - 8.5 micrometers , which is not available from this laser. This has led to the development of a CO₂ wavelength shifting technique that allows for interrogation of the 8 micrometers region. A two-stage process using the non-linear crystal AgGaSe₂ accomplishes the shifting. In the first stage, the 10.6 micrometers CO₂ laser pump is doubled to 5.3 micrometers by second harmonic generation which then pumps the second stage, shifting the wavelength to 8.3 micrometers by optical parametric oscillation. Energy conversion efficiencies of 40 percent have been obtained for the first stage shift and 10 percent in the second stage.

Citation Download Citation

Michael E. Ehritz, David B. Cohn, and Cynthia R. Swim "CO₂ laser wavelength shifter", Proc. SPIE 4484, Lidar Remote Sensing for Industry and Environment Monitoring II, (9 January 2002); https://doi.org/10.1117/12.452772

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