Abstract
Basic characteristics of CO 2 gas-dynamic laser (GDL) are investigated theoretically. A simplified theoretical model of vibrational relaxation processes is proposed. The population inversion and the small signal gain of the CO 2 GDL are calculated by using this model. The results are compared with the previous experimental results (J. Phys. Soc. Japan 36 (1974) 880). It is confirmed that the vibrational relaxation processes in the CO 2 GDL may be considered as the combination of the relaxation processes in a constant-temperature condition and the gasdynamic cooling processes in a supersonic nozzle flow. In addition, it is found that the Schwartz-Slawsky-Herzfeld (SSH) theory on the temperature dependence of vibrational relaxation times is approximately valid even in a low temperature region below 300 K. It is also suggested that the values of vibrational relaxation time under the condition of rapid cooling are much shorter (by a factor of 10 to 100) than those in heating phase.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
