Damage-resistant antireflection surfaces for high-power lasers

Journal Article · Mon Mar 01 00:00:00 EST 1982 · Energy Technol. Rev.; (United States)

OSTI ID:6611623

Antireflection surfaces are critical components of high-power lasers due to their relatively low damage threshold. A conventional antireflection surface is a coating of thin films of two or more transparent dielectrics that cause the destructive interference of wavelets reflected from interfaces between film layers while an unconventional one with superior characteristics can be made by etching a glass surface with micropores to form a graded-index surface. Such a surface can be produced on phase-separated glass, on homogeneous glasses formed by neutral-solution processing, and by etching sol-gel layers. All three types have high laser-damage threshold however, the first and third types have reflectance insensitive to incident wavelength and angle and the second and third have small bulk scattering loss. As drawbacks, the first and third types are mechanically fragile while the first and second transmit ultraviolet poorly. Further research is needed though in order to obtain practical results.

• OSTI ID: 6611623
• Journal Information: Energy Technol. Rev.; (United States), Journal Name: Energy Technol. Rev.; (United States)
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
NEODYMIUM LASERS
ANTIREFLECTION COATINGS
DIELECTRIC MATERIALS
ETCHING
RADIATION EFFECTS
REFLECTIVITY
SOL-GEL PROCESS
THIN FILMS
ULTRAVIOLET RADIATION
COATINGS
ELECTROMAGNETIC RADIATION
FILMS
LASERS
MATERIALS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
SOLID STATE LASERS
SURFACE FINISHING
SURFACE PROPERTIES
420300* - Engineering- Lasers- (-1989)