Computer Simulation of Nonlinear Propagation Characteristics of CO 2 Laser Pulse

The characteristics of pulse propagation through the CO 2 laser system LEKKO II are analysed numerically using a MELCOM COSMO 700 II digital computer. The amplifiers are treated with a Frantz and Nodvik type rate equation model, and the SF 6 saturable absorbers are treated with a phenomenological mo...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1980-08, Vol.19 (8), p.1487
Main Authors: Daido, Hiroyuki, Okehara, Junyoshi, Ido, Shunji, Matoba, Masafumi, Nakai, Sadao, Yamanaka, Chiyoe
Format: Article
Language:English
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Summary:The characteristics of pulse propagation through the CO 2 laser system LEKKO II are analysed numerically using a MELCOM COSMO 700 II digital computer. The amplifiers are treated with a Frantz and Nodvik type rate equation model, and the SF 6 saturable absorbers are treated with a phenomenological model based on the measurement of energy transmission. The computed results are compared with the observed data on the pulse energy, the rise time of the pulse and the pulse duration (FWHM). It is found that the pulse peak is delayed when the incident pulse energy is relatively small because of the nonlinear absorption chracteristics of SF 6 ; but proceeds effectively when the incident pulse energy is relatively large because of the nonlinear amplification characteristics of CO 2 lasers.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.19.1487