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Proceedings Paper

Transient gain phenomena and gain enhancement in a fast-axial flow CO2 laser amplifier
Author(s): Heihachi Sato; Eiichi Tsuchida; Koichi Kasuya
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Paper 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.

Paper Details

Date Published: 1 February 1991
PDF: 8 pages
Proc. SPIE 1397, 8th Intl Symp on Gas Flow and Chemical Lasers, (1 February 1991); doi: 10.1117/12.25904
Show Author Affiliations
Heihachi Sato, National Defense Academy (Japan)
Eiichi Tsuchida, National Defense Academy (Japan)
Koichi Kasuya, Tokyo Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 1397:
8th Intl Symp on Gas Flow and Chemical Lasers
Concepcion Maroto Domingo; Jose M. Orza, Editor(s)

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