A COMPACT, SEALED, SINGLE MODE TEA CO2 LASER

Authors
  1. Pace, P.
  2. Lacombe, M.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
A compact, sealed, TEA-CO2 laser utilizing a double-discharge technique has been constructed and operated under single-mode conditions. Sealed operational lifetimes exceeding E6 pulses have been obtained by the addition of small quantities of hydrogen and CO to the initial gas mixtures. It has also been found that operation without helium is possible giving single-mode output energies of about 20 mJ/pulse at peak powers of about 150 kW. The pulse repetition frequency was 0.5s1(-). The use of an 18 cm long laser cavity allowed the oscillation of only one longitudinal mode when the frequency of the cavity was tuned closely to the CO2 line centre frequency. An iris was used to restrict transverse modes to the TEM sub 00. Beat frequency measurements using a stable, CW CO2 laser indicate a "chirp" of about 5-6 MHz/mu s in the tail of the pulse.
Date of publication
01 Jan 1978
Number of Pages
5
Reprinted from
Optics Communications, vol 26, no 3, 1978, p 405-409
DSTKIM No
79-00165
CANDIS No
84529
Format(s):
Hardcopy;Originator's fiche received by DSIS

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