Life test of a sealed-off c02 laser with sn02 coated cathodes

Kaung-Hsiung Wu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


A sealed-off CO2 laser with an intracavity structure and dual discharge sections has been built to test its lifetime under different treatments of cathodes. The output characteristics of this laser system, under different discharge conditions, have also been investigated. Several techniques, such as the sealing of optical components on a laser tube, the coating of tin-oxide (SnO2) on stainless steel cathodes, and the making of a discharge tube of three layers, are established to construct this tube. By using SnO2 coated SUS 304 cathodes and a gas mixture of CO2:N2:He:Xe:H2=: 15:14:65:4:2 in this laser tube, an operational lifetime in excess of 1,800 hours and an output power up to 52W/m are obtained.


  • Intracavity
  • Life test
  • Sealed-off CO laser
  • Tin-oxide cathode


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