Abstract
Optical multilayers created from a single material have been demonstrated to have lower stress and lower thermal expansion mismatch than standard two-material coatings; however, questions of high power operation and vulnerability to environmental contamination remain. This study examines the particle-induced laser damage properties of all-silica high reflectivity multilayers, specifically those for high average power illumination. All-silica infrared reflectors were deposited by oblique angle deposition (OAD). All-silica mirrors showed low overall stress and had smaller stress changes with temperature. Their laser-induced damage thresholds (LIDTs) under high-power continuous wave (CW) laser illumination with carbon particulate contamination are significantly higher than corresponding high reflectivity multilayers composed of two materials.
Original language | English (US) |
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Journal | IEEE Photonics Journal |
DOIs | |
State | Accepted/In press - 2021 |
Bibliographical note
Publisher Copyright:CCBY
Keywords
- Coatings
- Films
- High-energy laser optics
- Nonhomogeneous media
- Pollution measurement
- Reflectivity
- Silicon compounds
- Stress
- laser-induced damage
- mirrors
- multilayers
- optical thin films
- particle contamination