Details
| Original language | English |
|---|---|
| Title of host publication | Laser-induced damage in optical materials: 2004 |
| Subtitle of host publication | 36th Annual Boulder Damage Symposium proceedings ; 20 - 22 September 2004, Boulder, Colorado |
| Place of Publication | Bellingham |
| Publisher | SPIE |
| Pages | 524-531 |
| Number of pages | 8 |
| ISBN (print) | 0-8194-5607-1 |
| Publication status | Published - 21 Feb 2005 |
| Externally published | Yes |
| Event | 36th Annual Boulder Damage Symposium : Laser-Induced Damage in Optical Materials: 2004 - Boulder, CO, United States Duration: 20 Sept 2004 → 22 Sept 2004 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Publisher | SPIE |
| Volume | 5647 |
| ISSN (Print) | 0277-786X |
Abstract
Ultra-short pulse laser systems with high peak power densities are increasingly applied in fundamental and industrial research. Furthermore, these radiation sources are also considered as promising tools for innovative applications in the fields of precise micro-machining and medicine applications. For an improvement of production throughput and j economic efficiency, the development of femtosecond laser systems with output powers beyond the actual level of about a few Watts is highly demanded. Further progresses in performance are mainly inhibited by the damage handling I capability of laser optical components. A promising strategy for an improvement of present fs-optics is the utilization of high band-gap coating materials. Several investigations in modeling of the damage mechanisms in dielectrics were performed recently. Typically, damage occurs if a critical conduction band population was generated by multi-photon and avalanche-ionization during the initial stage of the ultrashort pulse. Nevertheless, the influence of multi-photon excitation and electron donates (color centers) in the band-gap as sources of initial electrons is still unclear. For studying non-linear absorption effects of dielectric coating materials near the transition wavelengths between two orders of multi-photon absorption, a femtosecond laser system equipped with an optical parametric amplifier was utilized providing ultrashort pulses over a wide wavelength range. The laser-calorimetric measurements indicate a drastic change in the non-linear absorptance behavior for the investigated dielectrics. The results underline the dominant role of multi-photon excitation compared to intra-band electron donates for the generation of conduction band electrons in the case of high performance coatings manufactured by ion beam sputtering.
Keywords
- Fs-pulses, Multi-photon ionization, Non-linear absorptance, Optical parametric amplification, Ultra-short pulses
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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Laser-induced damage in optical materials: 2004: 36th Annual Boulder Damage Symposium proceedings ; 20 - 22 September 2004, Boulder, Colorado. Bellingham: SPIE, 2005. p. 524-531 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 5647).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Non-linear absorptance of optical parametric amplified ultrashort pulses in dielectric coating materials
AU - Starke, Kai
AU - Jupé, Marco
AU - Ristau, Detlev
AU - Sirutkaitis, Valdas
AU - Grigonis, R.
PY - 2005/2/21
Y1 - 2005/2/21
N2 - Ultra-short pulse laser systems with high peak power densities are increasingly applied in fundamental and industrial research. Furthermore, these radiation sources are also considered as promising tools for innovative applications in the fields of precise micro-machining and medicine applications. For an improvement of production throughput and j economic efficiency, the development of femtosecond laser systems with output powers beyond the actual level of about a few Watts is highly demanded. Further progresses in performance are mainly inhibited by the damage handling I capability of laser optical components. A promising strategy for an improvement of present fs-optics is the utilization of high band-gap coating materials. Several investigations in modeling of the damage mechanisms in dielectrics were performed recently. Typically, damage occurs if a critical conduction band population was generated by multi-photon and avalanche-ionization during the initial stage of the ultrashort pulse. Nevertheless, the influence of multi-photon excitation and electron donates (color centers) in the band-gap as sources of initial electrons is still unclear. For studying non-linear absorption effects of dielectric coating materials near the transition wavelengths between two orders of multi-photon absorption, a femtosecond laser system equipped with an optical parametric amplifier was utilized providing ultrashort pulses over a wide wavelength range. The laser-calorimetric measurements indicate a drastic change in the non-linear absorptance behavior for the investigated dielectrics. The results underline the dominant role of multi-photon excitation compared to intra-band electron donates for the generation of conduction band electrons in the case of high performance coatings manufactured by ion beam sputtering.
AB - Ultra-short pulse laser systems with high peak power densities are increasingly applied in fundamental and industrial research. Furthermore, these radiation sources are also considered as promising tools for innovative applications in the fields of precise micro-machining and medicine applications. For an improvement of production throughput and j economic efficiency, the development of femtosecond laser systems with output powers beyond the actual level of about a few Watts is highly demanded. Further progresses in performance are mainly inhibited by the damage handling I capability of laser optical components. A promising strategy for an improvement of present fs-optics is the utilization of high band-gap coating materials. Several investigations in modeling of the damage mechanisms in dielectrics were performed recently. Typically, damage occurs if a critical conduction band population was generated by multi-photon and avalanche-ionization during the initial stage of the ultrashort pulse. Nevertheless, the influence of multi-photon excitation and electron donates (color centers) in the band-gap as sources of initial electrons is still unclear. For studying non-linear absorption effects of dielectric coating materials near the transition wavelengths between two orders of multi-photon absorption, a femtosecond laser system equipped with an optical parametric amplifier was utilized providing ultrashort pulses over a wide wavelength range. The laser-calorimetric measurements indicate a drastic change in the non-linear absorptance behavior for the investigated dielectrics. The results underline the dominant role of multi-photon excitation compared to intra-band electron donates for the generation of conduction band electrons in the case of high performance coatings manufactured by ion beam sputtering.
KW - Fs-pulses
KW - Multi-photon ionization
KW - Non-linear absorptance
KW - Optical parametric amplification
KW - Ultra-short pulses
UR - http://www.scopus.com/inward/record.url?scp=18744364748&partnerID=8YFLogxK
U2 - 10.1117/12.597994
DO - 10.1117/12.597994
M3 - Conference contribution
AN - SCOPUS:18744364748
SN - 0-8194-5607-1
T3 - Proceedings of SPIE - The International Society for Optical Engineering
SP - 524
EP - 531
BT - Laser-induced damage in optical materials: 2004
PB - SPIE
CY - Bellingham
T2 - 36th Annual Boulder Damage Symposium
Y2 - 20 September 2004 through 22 September 2004
ER -