Gain characteristics of an atmospheric sealed CW CO&amp;lt;inf&amp;gt;2&amp;lt;/inf&amp;gt;laser

Absorption of intracavity radiation by CO2 molecules in an unexcited region has detrimental effects on output power characteristics, especially above a certain level of output power, i.e., the threshold level. These absorption effects have been investigated experimentally in detail. The threshold level depends both on CO2 concentration of the laser gas and on the mirror transmission of the optical cavity. It is found from these dependences that the absorption effect becomes serious above ∼0.2 W/cm3, which is the density of optical power absorbed by the unexcited CO2 molecules. The influence of self-absorption on the laser efficiency and the oscillating line of 10.4-μm band can be explained well by a usual theory for laser oscillation. Furthermore, a novel method for monitoring the concentration of CO2 molecules is demonstrated.

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Gain characteristics of an atmospheric sealed CW CO<inf>2</inf>laser

Cited by 15 publications

References 21 publications

Development of a Closed-Cycle CW TE CO Laser Operating in the Temperature Region 100–300 K

Development of a Closed-Cycle CW TE CO Laser Operating in the Temperature Region 100–300 K

The application of an unstable resonator to a high-pressure CW CO2 laser

Influence of self-absorption on output power characteristics of a high-pressure cw CO2 laser

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