NDLI: Power and efficiency of a continuous HF chemical laser

Content Provider	IEEE Xplore Digital Library
Author	Mirels, H. Spencer, D.J.
Copyright Year	1971
Description	Author affiliation: Aerospace Corporation, El Segundo, Calif. (Mirels, H.)
Abstract	Experimental measurements of laser power output and chemical efficiency are reported for a continuous HF chemical laser. In this device, arc-heated N2is mixed in a plenum with SF6to provide F atoms. The mixture is expanded to form a supersonic jet into which H2is diffused. Population inversion and lasing are due to H2+ F → HF (v) + H. Power levels of 1 kw have been obtained The efficiency of conversion of chemical energy to laser power is 16% at lcw SF6flow rates and approximately 10% at maximum power. For a fixed arc power, addition of O2into the plenum raises peak power by about 25% under present operating conditions and reduces sulphur deposition on mirror surfaces. The presence of HF and DF in the plenums of DF and HF lasers, respectively, did not appear to degrade laser performance. However, the presence of HF and DF in the plenums of HF and DF lasers, respectively, did degrade laser output. For given flow conditions, peak net laser power was obtained when the optical cavity axis was about 2 cm downstream of the H2injection station. Laser output was quenched when the cavity axis location was greater than 5 cm downstream.
Starting Page	88
Ending Page	88
File Size	84367
Page Count	1
File Format	PDF
DOI	10.1109/IEDM.1971.188408
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1971-10-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Chemical lasers Hafnium Power lasers Laser modes Ring lasers Sulfur hexafluoride Degradation Optical ring resonators Optical coupling Diffraction
Content Type	Text
Resource Type	Article

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