PERFORMANCE CHARACTERISTICS OF A CO2 WAVEGUIDE LASER

Authors
  1. Lavigne, P.
  2. Otis, G.
  3. Vincent, D.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
A rugged CW CO2 2-mm-diameter laser tube has been developed and its performance analyzed. It has been found that the small-signal gain was optimum when the CO2 partial pressure in a CO2:Xe:He mixture amounted to about 15 torr with the peak value decreasing with the CO2 proportion. Replacement of part of the CO2 by CO resulted in a significant improvement of the laser efficiency. A power extraction of 0.18 W/cm has been achieved at 110 torr with a CO2:CO:Xe:He mixture of 10:20:4:66 in a 9.5-cm-long discharge. There are indications that a better extraction is possible in longer tubes. Use of a grating as one end mirror was sufficient to control the electric field orientation and led to a greater tuning range by limiting the number of oscillating lines. At the present stage, semi-sealed-off operation is possible with a filling period of about 300 hours.
Report Number
DREV-4150/79 —
Date of publication
15 Aug 1979
Number of Pages
33
DSTKIM No
79-03310
CANDIS No
87637
Format(s):
Originator's fiche received by DSIS;Hardcopy

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