Long-range pulselength scaling of 351nm laser damage thresholds

Conference · Wed Jan 01 00:00:00 EST 1986

OSTI ID:6088704

Foltyn, S R; Jolin, L J

In a series of experiments incorporating 351nm pulselength of 9, 26, 54, and 625ns, it was found that laser damage thresholds increased as (pulselength)/sup x/, and that the exponent averaged 0.36 and ranged, for different samples, from 0.23 to 0.48. Similar results were obtained when only catastrophic damage was considered. Samples included Al/sub 2/O/sub 3//SiO/sub 2/ in both AR and HR multilayers, HR's of Sc/sub 2/O/sub 3//SiO/sub 2/ and HfO/sub 2//SiO/sub 2/, and Al-on-pyrex mirror; 9ns thresholds were between 0.2 to 5.6 J/cm/sup 2/. When these data were compared with a wide range of other results - for wavelengths from 0.25 to 10.6 microns and pulselengths down to 4ps - a remarkably consistent picture emerged. Damage thresholds, on average, increase approximately as the cube-root of pulselength from picoseconds to nearly a microsecond, and do so regardless of wavelength or material under test. 18 refs.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6088704
• Report Number(s): LA-UR-87-2856; CONF-8611154-2; ON: DE87014754
• Resource Relation: Conference: Boulder damage symposium, Boulder, CO, USA, 3 Nov 1986; Other Information: Paper copy only, copy does not permit microfiche production
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
36 MATERIALS SCIENCE
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALUMINIUM OXIDES
DAMAGE
PERFORMANCE TESTING
LASER MIRRORS
COATINGS
COMPARATIVE EVALUATIONS
EXCIMER LASERS
HAFNIUM OXIDES
PROBABILITY
PULSES
SCANDIUM OXIDES
ALUMINIUM COMPOUNDS
CHALCOGENIDES
GAS LASERS
HAFNIUM COMPOUNDS
LASERS
MIRRORS
OXIDES
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
SCANDIUM COMPOUNDS
TESTING
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