Multiple-pulse damage thresholds of optical components for excimer lasers
Conference
·
OSTI ID:552294
- Laser-Laboratorium Goettingen (Germany)
For characterization of the long-term stability of UV optical components a set-up for determination of multiple-pulse (`S-on-l`) damage thresholds has been developed. Using a high power excimer laser (250W, 25ns), `S-on-1` damage thresholds were measured at 248nm for bare UV substrates as well as high- and anti-reflective dielectric coatings, indicating characteristic dependencies on the number of applied laser pulses and pulse repetition rates (up to 300Hz). It could be demonstrated that the multiple pulse threshold of dielectric coatings strongly depends on the thermal conductivity of the substate. In addition, stability tests were performed at 308nm on Al{sub 2}O{sub 3}/SiO{sub 2} HR coatings applying 10{sup 8} pulses of up to 400mJ/cm{sup 2}. Although the samples did withstand this long-term irradiation without damage, a slight degradation of the optical properties and a laser-induced contamination layer on the irradiated area were observed.
- Research Organization:
- International Society for Optical Engineering, Washington, DC (United States)
- OSTI ID:
- 552294
- Report Number(s):
- CONF-961070--Vol.2966; CNN: Grant 13EU0137
- Country of Publication:
- United States
- Language:
- English
Similar Records
Characterization of absorption and degradation on optical components for high power excimer lasers
Laser induced damage in optical materials under UV excimer laser radiation
Review of uv laser damage measurements at Lawrence Livermore National Laboratory
Conference
·
Mon Dec 30 23:00:00 EST 1996
·
OSTI ID:552025
Laser induced damage in optical materials under UV excimer laser radiation
Conference
·
Sat Dec 30 23:00:00 EST 1995
·
OSTI ID:552192
Review of uv laser damage measurements at Lawrence Livermore National Laboratory
Conference
·
Fri Sep 12 00:00:00 EDT 1986
·
OSTI ID:5014498