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Title: Limitation of the output power of cw electric-discharge CO{sub 2} lasers

The output power of a sealed-off tunable cw CO{sub 2} laser was optimised. The dependences of the small-signal gain for the 10P(20) line and of the output powers for different transmittances of the cavity on the discharge current were determined. The distributed loss coefficient and the saturation parameter were measured. The saturation parameter increased continuously with increase in the discharge current, leading to a mismatch between the output power and gain maxima. It was established that the principal factor limiting the output power of cw electric-discharge CO{sub 2} lasers is not an increase in the temperature of the active medium but the dissociation of CO{sub 2} molecules. When the latter is minimised in order to achieve the maximum laser power, low gas temperatures are not required. (lasers)
Authors:
 [1]
  1. B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk (Belarus)
Publication Date:
OSTI Identifier:
21442620
Resource Type:
Journal Article
Resource Relation:
Journal Name: Quantum Electronics (Woodbury, N.Y.); Journal Volume: 29; Journal Issue: 4; Other Information: DOI: 10.1070/QE1999v029n04ABEH001472
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CARBON DIOXIDE; CARBON DIOXIDE LASERS; CURRENTS; DISSOCIATION; ELECTRIC DISCHARGES; GAIN; LASER CAVITIES; LOSSES; SIGNALS AMPLIFICATION; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; GAS LASERS; LASERS; OXIDES; OXYGEN COMPOUNDS