Laser Power Density Dependence in Absorption Measurements

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The absorption cross section of CF2Cl2 has been measured as a function of presure and CO2 laser input power at 10.764 μm. The laser was operated in the continuous wave mode providing a continuous energy deposition in the sample. It is shown that the absorption cross section measured has a strong dependence on input power density in the range from 5 to 15 W/cm2 and pressure in the 3 to 50 Torr regime. It is demonstrated that most of these effects can be attributed to the temperature rise in the beam interaction volume.

Keywords: CO2 lasers; Infrared; Techniques, spectroscopic

Document Type: Research Article


Affiliations: Westinghouse Research & Development Center, Pittsburgh, Pennsylvania 15235

Publication date: May 1, 1980

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