Atmospheric absorption effects in beam delivery for industrial CO lasers

Quisheng Cao, Howard J. Baker, Denis R. Hall

Research output: Contribution to journalArticlepeer-review


Spectrally resolved atmospheric absorption has been investigated to determine the problems of long path beam delivery of high power industrial CO laser light for material processing. A dry gas purged beam path is found to be essential if the natural CO laser spectrum is used. However, an unpurged beam delivery system may be satisfactory over typical distances when the spectrum is modified to avoid coincidence with strong water lines by the use of an intra- cavity absorption section. ©2005 Copyright SPIE - The International Society for Optical Engineering.

Original languageEnglish
Pages (from-to)297-300
Number of pages4
JournalProceedings of SPIE - the International Society for Optical Engineering
Publication statusPublished - 1997
EventXI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference - Edinburgh, United Kingdom
Duration: 25 Aug 199625 Aug 1996


  • Beam delivery system
  • CO laser
  • Water vapour IR absorption


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