Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | Laser-induced damage in optical materials |
| Untertitel | 1997 : proceedings |
| Erscheinungsort | Bellingham |
| Herausgeber (Verlag) | SPIE |
| Seiten | 188-198 |
| Seitenumfang | 11 |
| ISBN (Print) | 0-8194-2683-0 |
| Publikationsstatus | Veröffentlicht - 20 Apr. 1997 |
| Extern publiziert | Ja |
| Veranstaltung | Laser-Induced Damage in Optical Materials: 1997 - Boulder, CO, USA / Vereinigte Staaten Dauer: 6 Okt. 1997 → 8 Okt. 1997 |
Publikationsreihe
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Herausgeber (Verlag) | SPIE |
| Band | 3244 |
| ISSN (Print) | 0277-786X |
Abstract
The measurement of intrinsic laser induced damage thresholds (LIDT) in optical components for continuous wave (CW) CO2 radiation has been investigated. A combination of analytical and numerical models showed that the temperature rise is mainly determined by the surface absorption in transmissive as well as reflective components, and is proportional to the ratio of power to linear dimension (P/d) of the irradiated spot rather than to the conventional power/area (P/d2) parameter. The former ratio therefore represents the correct power scaling law for LIDT measurement in CW laser systems. The precise time domain within which this law holds is a function of spot diameter. This prediction has been confirmed by experimental LIDT tests on well characterised uncoated ZnSe substrates and copper mirrors, and on coated ZnSe windows and copper mirrors. Measured P/d values, though lower than predicted by modelling are considerably higher than those inferred from the technical literature, and show that transmissive components may be used at much higher powers than are at present believed. The results indicate that surface absorption occurs primarily in the sub-surface processing layer. This has been shown by transmission electron microscopy and spectroscopic ellipsometry to be a few hundred nm in depth.
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Elektronische, optische und magnetische Materialien
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
- Informatik (insg.)
- Angewandte Informatik
- Mathematik (insg.)
- Angewandte Mathematik
- Ingenieurwesen (insg.)
- Elektrotechnik und Elektronik
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- BibTex
- RIS
Laser-induced damage in optical materials: 1997 : proceedings. Bellingham: SPIE, 1997. S. 188-198 (Proceedings of SPIE - The International Society for Optical Engineering; Band 3244).
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Continuous wave CO2 laser induced damage thresholds in optical components
AU - Puttick, Keith
AU - Holm, Rune
AU - Ristau, Detlev
AU - Natzschka, Urs
AU - Kiriakidis, George
AU - Garawal, Nirmal
AU - Judd, Eddie
AU - Holland, David
AU - Greening, David
AU - Ellis, Nick
AU - Wilkinson, Mark
AU - Pamies, Miguel Garcia
AU - Sanviti, Celestino
PY - 1997/4/20
Y1 - 1997/4/20
N2 - The measurement of intrinsic laser induced damage thresholds (LIDT) in optical components for continuous wave (CW) CO2 radiation has been investigated. A combination of analytical and numerical models showed that the temperature rise is mainly determined by the surface absorption in transmissive as well as reflective components, and is proportional to the ratio of power to linear dimension (P/d) of the irradiated spot rather than to the conventional power/area (P/d2) parameter. The former ratio therefore represents the correct power scaling law for LIDT measurement in CW laser systems. The precise time domain within which this law holds is a function of spot diameter. This prediction has been confirmed by experimental LIDT tests on well characterised uncoated ZnSe substrates and copper mirrors, and on coated ZnSe windows and copper mirrors. Measured P/d values, though lower than predicted by modelling are considerably higher than those inferred from the technical literature, and show that transmissive components may be used at much higher powers than are at present believed. The results indicate that surface absorption occurs primarily in the sub-surface processing layer. This has been shown by transmission electron microscopy and spectroscopic ellipsometry to be a few hundred nm in depth.
AB - The measurement of intrinsic laser induced damage thresholds (LIDT) in optical components for continuous wave (CW) CO2 radiation has been investigated. A combination of analytical and numerical models showed that the temperature rise is mainly determined by the surface absorption in transmissive as well as reflective components, and is proportional to the ratio of power to linear dimension (P/d) of the irradiated spot rather than to the conventional power/area (P/d2) parameter. The former ratio therefore represents the correct power scaling law for LIDT measurement in CW laser systems. The precise time domain within which this law holds is a function of spot diameter. This prediction has been confirmed by experimental LIDT tests on well characterised uncoated ZnSe substrates and copper mirrors, and on coated ZnSe windows and copper mirrors. Measured P/d values, though lower than predicted by modelling are considerably higher than those inferred from the technical literature, and show that transmissive components may be used at much higher powers than are at present believed. The results indicate that surface absorption occurs primarily in the sub-surface processing layer. This has been shown by transmission electron microscopy and spectroscopic ellipsometry to be a few hundred nm in depth.
KW - CO laser
KW - Damage threshold
KW - High power
KW - Infra-red
KW - Optical components
KW - Surface absorption
UR - http://www.scopus.com/inward/record.url?scp=18544387877&partnerID=8YFLogxK
U2 - 10.1117/12.307045
DO - 10.1117/12.307045
M3 - Conference contribution
AN - SCOPUS:18544387877
SN - 0-8194-2683-0
T3 - Proceedings of SPIE - The International Society for Optical Engineering
SP - 188
EP - 198
BT - Laser-induced damage in optical materials
PB - SPIE
CY - Bellingham
T2 - Laser-Induced Damage in Optical Materials: 1997
Y2 - 6 October 1997 through 8 October 1997
ER -