Journal ArticleDOI
Influence of rotational relaxation in a CO2 amplifier on the shape of a short amplified pulse
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TLDR
In this paper, the shape of a nanosecond radiation pulse propagated in a TEA CO2 amplifier having a 5m long amplifying medium was investigated and it was shown experimentally and theoretically that under certain conditions there was a substantial change in the pulse shape; a second peak caused by rotational relaxation in the Amplifying Medium appeared at the trailing edge of a pulse.Abstract:
An investigation was made into the change in shape of a nanosecond radiation pulse as it propagated in a TEA CO2 amplifier having a 5-m long amplifying medium. It was shown experimentally and theoretically that under certain conditions there was a substantial change in the pulse shape; a second peak caused by rotational relaxation in the amplifying medium appeared at the trailing edge of a pulse.read more
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Journal ArticleDOI
Influence of diffraction and nonresonant absorption on ultrashort pulse formation in a CO2 amplifier
TL;DR: In this article, a numerical investigation was made of the splitting of an amplified pulse in a CO2 amplifier with a long interaction length, and it was shown that an allowance for nonresonant absorption in the medium and for spreading of the beam due to diffraction led to an increase in the time interval between the first pulse and the repeat pulses which appear because of rotational relaxation.