Pulsed D/sub 2/-F/sub 2/ chain-laser damage to coated window and mirror components
Technical Report
·
OSTI ID:5785914
Large-spot laser damage thresholds were measured for bowl-feed-polished CaF/sub 2/ and sapphire windows (bare and antireflection-coated) and for highly polished copper mirrors (bare and carbyne-coated) at DF chain-laser wavelengths (3.58-4.78 ..mu..m). Commercially available antireflection-coated CaF/sub 2/ and Al/sub 2/O/sub 3/ samples were found to have damage thresholds from 17 to 28 J/cm/sup 2/. Significantly larger damage thresholds were observed for uncoated, polished samples of Al/sub 2/O/sub 3/, but damage resistance of uncoated polished CaF/sub 2/ was found to equal that of the best antireflection-coated CaF/sub 2/ samples. A highly polished copper mirror had the highest damage threshold of all the materials tested, i.e., 58 J/cm/sup 2/. Carbyne films of diamond-like hardness, a type of carbon coating, were applied to polished copper mirrors and bowl-feed-polished CaF/sub 2/ surfaces. The carbyne coatings prepared in this work contained numerous carbon-bearing particles that were easily damaged (approx.10 J/cm/sup 2/). However, regions of the irradiated carbyne film that were free of carbon particles withstood high laser fluences (25 J/cm/sup 2/).
- Research Organization:
- Aerospace Corp., El Segundo, CA (USA). Aerophysics Lab.
- OSTI ID:
- 5785914
- Report Number(s):
- SD-TR-83-92; ON: DE85901412
- Country of Publication:
- United States
- Language:
- English
Similar Records
Pulsed D/sub 2/-F/sub 2/ chain-laser damage to coated window and mirror components. Technical report
Thresholds measured with 350-nm pulses at 25 to 100 Hz for bare polished crystals of CaF/sub 2/ and for silica sol-gel AR coatings on silica substrates
Damage thresholds in ZnSe, A/R coated NaCl and micromachined mirrors by 10. 6. mu. m multijoule, nanosecond pulses
Technical Report
·
Wed Dec 14 23:00:00 EST 1983
·
OSTI ID:6737849
Thresholds measured with 350-nm pulses at 25 to 100 Hz for bare polished crystals of CaF/sub 2/ and for silica sol-gel AR coatings on silica substrates
Conference
·
Sun Feb 02 23:00:00 EST 1986
·
OSTI ID:5955971
Damage thresholds in ZnSe, A/R coated NaCl and micromachined mirrors by 10. 6. mu. m multijoule, nanosecond pulses
Journal Article
·
Mon Dec 31 23:00:00 EST 1973
· Natl. Bur. Stand. (U.S.), Spec. Publ.; (United States)
·
OSTI ID:7087385
Related Subjects
42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ANTIREFLECTION COATINGS
CALCIUM COMPOUNDS
CALCIUM FLUORIDES
CALCIUM HALIDES
CARBYNES
CHALCOGENIDES
COATINGS
COPPER
CORUNDUM
DAMAGE
DEUTERIUM
ELECTROMAGNETIC RADIATION
ELEMENTS
FLUORIDES
FLUORINE
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HALOGENS
HYDROGEN ISOTOPES
ISOTOPES
LASER MIRRORS
LASER RADIATION
LASERS
LIGHT NUCLEI
METALS
MINERALS
MIRRORS
NONMETALS
NUCLEI
ODD-ODD NUCLEI
OPENINGS
OPTICAL SYSTEMS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PROTECTIVE COATINGS
PULSES
RADIATIONS
RADICALS
SAPPHIRE
STABLE ISOTOPES
TRANSITION ELEMENTS
WINDOWS
420300* -- Engineering-- Lasers-- (-1989)
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ANTIREFLECTION COATINGS
CALCIUM COMPOUNDS
CALCIUM FLUORIDES
CALCIUM HALIDES
CARBYNES
CHALCOGENIDES
COATINGS
COPPER
CORUNDUM
DAMAGE
DEUTERIUM
ELECTROMAGNETIC RADIATION
ELEMENTS
FLUORIDES
FLUORINE
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HALOGENS
HYDROGEN ISOTOPES
ISOTOPES
LASER MIRRORS
LASER RADIATION
LASERS
LIGHT NUCLEI
METALS
MINERALS
MIRRORS
NONMETALS
NUCLEI
ODD-ODD NUCLEI
OPENINGS
OPTICAL SYSTEMS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PROTECTIVE COATINGS
PULSES
RADIATIONS
RADICALS
SAPPHIRE
STABLE ISOTOPES
TRANSITION ELEMENTS
WINDOWS