SYMPOSIA PAPER Published: 01 January 1988
STP18752S

Laser Induced Mo Mirror Damage for High Power CO Laser

Source

We have developed a high-purity molybdenum (Mo) mirror by electron-beam melting method (e.b.m. Mo mirror). Its high laser-damage threshold has been demonstrated for the high-power TEA CO2 laser system. The e.b.m. Mo mirror has a damage threshold of 2 to 4 times higher than that of an Au coated glass mirror and had a life time of 3 times longer than that of a powder metallurgy Mo mirror (p.m.Mo mirror) when the laser energy density of higher than 60 J/cm2 was irradiated. We found that on the laser-damage threshold the difference between the e.b.m. Mo mirror and the p.m.Mo mirror was due to the fine surface without voids and the small amount of impurities.

Author Information

Okamoto, H
Matsusue, N
Kitazima, K
Yoshida, K
Ichikawa, Y
Yamanaka, M
Yamanaka, T
Tsunawaki, Y
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Details
Developed by Committee: F01
Pages: 248–260
DOI: 10.1520/STP18752S
ISBN-EB: 978-0-8031-5031-7
ISBN-13: 978-0-8031-4479-8