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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 34,
  • Issue 3,
  • pp. 311-313
  • (1980)

Laser Power Density Dependence in Absorption Measurements

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Abstract

The absorption cross section of CF<sub>2</sub>Cl<sub>2</sub> has been measured as a function of presure and CO<sub>2</sub> 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/cm<sup>2</sup> 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.

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