Single- and multiple-shot laser-damage properties of commercial grade PMMA
Journal Article
·
· Appl. Opt.; (United States)
In this paper, we describe a facility to study laser damage in plastics and present single- and multiple-shot bulk damage results obtained in commercial polymethylmethacrylate with 1.06-..mu..m wavelength, 8-nsec FWHM, 45-..mu..m spot diameter pulses. The measured single-shot peak fluence damage threshold is 41 J/cm/sup 2/. Multiple-shot damage was studied at fluence levels as low as 6% of the single-shot damage threshold. Scattered collinear He--Ne laser light was found to be a very reliable indicator of damage, especially at the lower fluence levels. Histograms of damage statistics and 100 x microscopy of the material after illumination with fewer than the critical numbers of pulses required for damage illustrate the cumulative nature of the damage process.
- Research Organization:
- Air Force Systems Command, Frank J. Seiler Research Laboratory, U.S. Air Force Academy, Colorado Springs, Colorado 80840
- OSTI ID:
- 6791311
- Journal Information:
- Appl. Opt.; (United States), Journal Name: Appl. Opt.; (United States) Vol. 23:5; ISSN APOPA
- Country of Publication:
- United States
- Language:
- English
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