Antireflecting film development. Final report. [For resisting damage from laser pulses]

Technical Report · Mon May 11 04:00:00 EDT 1981

OSTI ID:6067186

Hahs, T S

A metal-organic precursor was formulated that is converted by heating on surfaces of ordinary glass to a phase-separated metal-organic-derived glass coating, without exceeding 375/sup 0/C. This phase-separated layer is quickly and easily leached by nitric acid to leave a graded index, antireflective coating on ordinary glass (e.g., BK-7 optical glass or fused silica) that protects it against damage by high fluence of laser light at 1060 nm and shorter wavelengths. The metal-organic precursor is relatively inexpensive, and the thickness applied to the glass surface is not very critical for the achievement of protection for the glass surface from 1 ns pulses of laser energy. Laser damage testing at 248 nm with this coating on silica discs was thought to show separation of the coating from the substrate at fluences as low as 1.2 J/cm/sup 2/ with fracture damage at 4.9 J/cm/sup 2/. These tests results provide a criterion we lacked. If laser damage tests could be performed promptly, we recommend treatments that should strengthen the union of coating to substrate.

• Research Organization: Owens-Illinois, Inc., Toledo, OH (USA). Corporate Technology Div.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6067186
• Report Number(s): UCRL-15373; ON: DE81030010
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
42 ENGINEERING
420300 -- Engineering-- Lasers-- (-1989)
ANTIREFLECTION COATINGS
CHALCOGENIDES
COATINGS
DAMAGE
ELECTROMAGNETIC RADIATION
GLASS
LASER MIRRORS
LASER RADIATION
MINERALS
MIRRORS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
REFLECTION
SILICA
SILICON COMPOUNDS
SILICON OXIDES