Details
| Original language | English |
|---|---|
| Title of host publication | 45th Annual Laser Damage Symposium Proceedings - Laser-Induced Damage in Optical Materials |
| Subtitle of host publication | 2013 |
| Publisher | SPIE |
| ISBN (print) | 9780819497536 |
| Publication status | Published - 14 Nov 2013 |
| Externally published | Yes |
| Event | 45th Annual Laser Damage Symposium - Laser-Induced Damage in Optical Materials: 2013 - Boulder, CO, United States Duration: 22 Sept 2013 → 25 Sept 2013 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 8885 |
| ISSN (Print) | 0277-786X |
| ISSN (electronic) | 1996-756X |
Abstract
During the 1990s the International Standard for absorptance testing of optical coatings was developed. Based on the method of laser calorimetry and after years of theoretical and empirical work, ISO 115511 was revised and published in its current version in 2003. Laser calorimetry is based on the measurement and evaluation of the temperature increase caused by absorption in the sample exposed to laser radiation. In dependence on the thermal diffusivity of the sample, a temperature distribution develops in the irradiated sample. Therefore, finding a correlation of temperature increase and absorption becomes a complex task. This challenge was met by keeping the sample geometry to a standard size and simulating the thermal distribution for a number of optical materials. By this, LZH developed a calorimetric test set-up that offers fully calibrated absorptance values for sample diameters of 25 mm (or 1 inch) with a total error of below 13 % and a relative measurement error of below 5%. However, this technique is limited to the mentioned sample geometry. This work presents a new approach to adjust the measurement configuration to numerous sample sizes of standard circular laser components. Finite element analysis and experimental verification is presented for exemplary values of the samples diameters. Based on a new sample mount concept, this procedure allows utilizing all flexibility in test wavelength and angle of incidence, combined with the sensitivity level sufficient for current optical materials.
Keywords
- Absorption, Contamination, High power laser, Laser calorimetry, Metrology, Optical thin films, Substrates, Ultrafast laser optics
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
- Computer Science(all)
- Computer Science Applications
- Mathematics(all)
- Applied Mathematics
- Engineering(all)
- Electrical and Electronic Engineering
Cite this
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- BibTeX
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45th Annual Laser Damage Symposium Proceedings - Laser-Induced Damage in Optical Materials: 2013. SPIE, 2013. 88851L (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8885).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Laser calorimetric absorptance testing of samples with varying geometry
AU - Balasa, Istvan
AU - Jensen, Lars
AU - Ristau, Detlev
PY - 2013/11/14
Y1 - 2013/11/14
N2 - During the 1990s the International Standard for absorptance testing of optical coatings was developed. Based on the method of laser calorimetry and after years of theoretical and empirical work, ISO 115511 was revised and published in its current version in 2003. Laser calorimetry is based on the measurement and evaluation of the temperature increase caused by absorption in the sample exposed to laser radiation. In dependence on the thermal diffusivity of the sample, a temperature distribution develops in the irradiated sample. Therefore, finding a correlation of temperature increase and absorption becomes a complex task. This challenge was met by keeping the sample geometry to a standard size and simulating the thermal distribution for a number of optical materials. By this, LZH developed a calorimetric test set-up that offers fully calibrated absorptance values for sample diameters of 25 mm (or 1 inch) with a total error of below 13 % and a relative measurement error of below 5%. However, this technique is limited to the mentioned sample geometry. This work presents a new approach to adjust the measurement configuration to numerous sample sizes of standard circular laser components. Finite element analysis and experimental verification is presented for exemplary values of the samples diameters. Based on a new sample mount concept, this procedure allows utilizing all flexibility in test wavelength and angle of incidence, combined with the sensitivity level sufficient for current optical materials.
AB - During the 1990s the International Standard for absorptance testing of optical coatings was developed. Based on the method of laser calorimetry and after years of theoretical and empirical work, ISO 115511 was revised and published in its current version in 2003. Laser calorimetry is based on the measurement and evaluation of the temperature increase caused by absorption in the sample exposed to laser radiation. In dependence on the thermal diffusivity of the sample, a temperature distribution develops in the irradiated sample. Therefore, finding a correlation of temperature increase and absorption becomes a complex task. This challenge was met by keeping the sample geometry to a standard size and simulating the thermal distribution for a number of optical materials. By this, LZH developed a calorimetric test set-up that offers fully calibrated absorptance values for sample diameters of 25 mm (or 1 inch) with a total error of below 13 % and a relative measurement error of below 5%. However, this technique is limited to the mentioned sample geometry. This work presents a new approach to adjust the measurement configuration to numerous sample sizes of standard circular laser components. Finite element analysis and experimental verification is presented for exemplary values of the samples diameters. Based on a new sample mount concept, this procedure allows utilizing all flexibility in test wavelength and angle of incidence, combined with the sensitivity level sufficient for current optical materials.
KW - Absorption
KW - Contamination
KW - High power laser
KW - Laser calorimetry
KW - Metrology
KW - Optical thin films
KW - Substrates
KW - Ultrafast laser optics
UR - http://www.scopus.com/inward/record.url?scp=84892633663&partnerID=8YFLogxK
U2 - 10.1117/12.2030273
DO - 10.1117/12.2030273
M3 - Conference contribution
AN - SCOPUS:84892633663
SN - 9780819497536
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - 45th Annual Laser Damage Symposium Proceedings - Laser-Induced Damage in Optical Materials
PB - SPIE
T2 - 45th Annual Laser Damage Symposium - Laser-Induced Damage in Optical Materials: 2013
Y2 - 22 September 2013 through 25 September 2013
ER -