Transient gain phenomena and gain enhancement in a fast-axial flow CO2 laser amplifier

Heihachi Sato; Eiichi Tsuchida; Koichi Kasuya

doi:10.1117/12.25904

1 February 1991 Transient gain phenomena and gain enhancement in a fast-axial flow CO2 laser amplifier

Heihachi Sato, Eiichi Tsuchida, Koichi Kasuya

Proceedings Volume 1397, 8th Intl Symp on Gas Flow and Chemical Lasers; (1991) https://doi.org/10.1117/12.25904
Event: Eighth International Symposium on Gas-Flow and Chemical Lasers, 1990, Madrid, Spain

Abstract

The transient gain phenomena observed in a fast-axial flow CO2 laser amplifier are theoretically explained by taking into account a gas temperature T and an inverted population ratio n2/n1 as a function of discharge time. Expressing the transient gain as a function of the gas-flow velocity v and the discharge current Idis including their spatial distribution along the radial direction of a plasma tube , both the transient power-decrease jP and transient time required to be a stable value are formulated with respect to a plasma length tst and an input probe power P , being well consistent with the corresponding experiments . Possibilities of improving these transient behavior are also demonstrated by cooling a plasmatube wall and a gold catalyst.

Citation Download Citation

Heihachi Sato, Eiichi Tsuchida, and Koichi Kasuya "Transient gain phenomena and gain enhancement in a fast-axial flow CO2 laser amplifier", Proc. SPIE 1397, 8th Intl Symp on Gas Flow and Chemical Lasers, (1 February 1991); https://doi.org/10.1117/12.25904

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