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Optical Engineering

Effect of buffer gas pressure on the spatiotemporal evolution of small-signal gain in copper vapor laser
Author(s): Ramakant Mahakud; Om Prakash; R. Biswal; S. K. Dixit
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Paper Abstract

We report the effect of buffer gas (neon) pressure on the spatiotemporal small signal gain evolution characteristics of a copper vapor laser (CVL). The CVL discharge tube of diameter 47 mm and length 150 cm is studied for neon pressure from 20 to 70 mbar. The gain evolution is mapped by a specially generated 6-ns, 510.6-nm probe pulse. The evolution of gain at the center and at the edge are found to be widely different for different gas pressures. At lower pressure (20 mbar), the gain at the edge is higher compared to that at the center, however, the situation is reversed at higher pressure (70 mbar). The increased laser-circuit impedance matching and the reduced discharge plasma skin effect with increase in buffer gas pressure are the possible mechanisms responsible for such a changeover.

Paper Details

Date Published: 1 February 2006
PDF: 7 pages
Opt. Eng. 45(2) 024201 doi: 10.1117/1.2172173
Published in: Optical Engineering Volume 45, Issue 2
Show Author Affiliations
Ramakant Mahakud, Raja Ramanna Ctr. for Advanced Technology (India)
Om Prakash, Raja Ramanna Ctr. for Advanced Technology (India)
R. Biswal, Ctr. for Advanced Technology (India)
S. K. Dixit, Ctr. for Advanced Technology (India)

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