Details
| Original language | English |
|---|---|
| Title of host publication | 50th Annual Laser Damage Symposium Proceedings - Laser-Induced Damage in Optical Materials 2018 |
| Publisher | SPIE |
| ISBN (electronic) | 9781510621930 |
| Publication status | Published - 16 Nov 2018 |
| Externally published | Yes |
| Event | 50th Annual Laser Damage Symposium - Laser-Induced Damage in Optical Materials 2018 - Boulder, United States Duration: 23 Sept 2018 → 26 Sept 2018 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 10805 |
| ISSN (Print) | 0277-786X |
| ISSN (electronic) | 1996-756X |
Abstract
We have studied laser induced material modification in a frequency tripling mirror (FTM) consisting of alternating hafnia and silica layers. The third-harmonic signal generated by a train of femtosecond laser pulses (791 nm, 55 fs, 110 MHz) drops over time until it reaches about 20% of the initial value. From the observed changes in reflection and transmission of the mirror a refractive index change of 0.07 was estimated, which occurs in the layer with the highest field enhancement. This index change triggers a drop in the field enhancement, which reduces the efficiency of nonlinear optical processes. The estimated value of ▵n allowed us to explain the 80% reduction in conversion efficiency and as well as an observed decrease in two-photon absorption.
Keywords
- Dielectric Multilayers, Femtosecond lasers, LIDT, Third Harmonic Generation (THG)
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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50th Annual Laser Damage Symposium Proceedings - Laser-Induced Damage in Optical Materials 2018. SPIE, 2018. 108051W (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10805).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Femtosecond laser-induced modifications of frequency tripling mirrors
AU - Oskouei, Amir Khabbazi
AU - Baur, Sebastian
AU - Emmert, Luke
AU - Jupe, Marco
AU - Willemsen, Thomas
AU - Steinecke, Morten
AU - Jensen, Lars
AU - Ristau, Detlev
AU - Rudolph, Wolfgang
N1 - Funding information: The authors acknowledge financial support from the College of Arts and Sciences of the University of New Mexico and from the German Bundesministerium fuer Bildung und Forschung.
PY - 2018/11/16
Y1 - 2018/11/16
N2 - We have studied laser induced material modification in a frequency tripling mirror (FTM) consisting of alternating hafnia and silica layers. The third-harmonic signal generated by a train of femtosecond laser pulses (791 nm, 55 fs, 110 MHz) drops over time until it reaches about 20% of the initial value. From the observed changes in reflection and transmission of the mirror a refractive index change of 0.07 was estimated, which occurs in the layer with the highest field enhancement. This index change triggers a drop in the field enhancement, which reduces the efficiency of nonlinear optical processes. The estimated value of ▵n allowed us to explain the 80% reduction in conversion efficiency and as well as an observed decrease in two-photon absorption.
AB - We have studied laser induced material modification in a frequency tripling mirror (FTM) consisting of alternating hafnia and silica layers. The third-harmonic signal generated by a train of femtosecond laser pulses (791 nm, 55 fs, 110 MHz) drops over time until it reaches about 20% of the initial value. From the observed changes in reflection and transmission of the mirror a refractive index change of 0.07 was estimated, which occurs in the layer with the highest field enhancement. This index change triggers a drop in the field enhancement, which reduces the efficiency of nonlinear optical processes. The estimated value of ▵n allowed us to explain the 80% reduction in conversion efficiency and as well as an observed decrease in two-photon absorption.
KW - Dielectric Multilayers
KW - Femtosecond lasers
KW - LIDT
KW - Third Harmonic Generation (THG)
UR - http://www.scopus.com/inward/record.url?scp=85061037976&partnerID=8YFLogxK
U2 - 10.1117/12.2500675
DO - 10.1117/12.2500675
M3 - Conference contribution
AN - SCOPUS:85061037976
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - 50th Annual Laser Damage Symposium Proceedings - Laser-Induced Damage in Optical Materials 2018
PB - SPIE
T2 - 50th Annual Laser Damage Symposium - Laser-Induced Damage in Optical Materials 2018
Y2 - 23 September 2018 through 26 September 2018
ER -