The inclusion problem in laser glass

RW HOPPER RW, C LEE C, DR UHLMANN DR

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations

Abstract

The problem of inclusion damage in laser glass is considered with attention directed to an improved treatment of the stress around a hot inclusion particle. The existence of a layer of molten glass surrounding such particles is suggested; and the new analysis indicates a maximum tensile stress in the nearby cooler glass, rather than at the solid- liquid glass boundary. The magnitude of this tensile stress can exceed the expected strength of the glass for a range of particle sizes under high power laser operation, and failure is then expected to occur. Thereakdown condition is shown to depend upon the flux level and pulse time of the laser beam, as well as the size and shape of the inclusion particles and various material properties of the inclusion and glass. Under most conditions of laser operation, nonmetallic inclusions - even those containing large concentrations of highly absorbing ions - are expected to be safe; and under all conditions they should be appreciable less dangerous than similar metal particles.

Original languageEnglish (US)
Pages55-66
Number of pages12
StatePublished - Jan 1 1970
Externally publishedYes
EventNBS Spec Publ 341 Proc Symp on Damage in Laser Mater - Boulder, Colo
Duration: Jun 24 1970Jun 25 1970

Other

OtherNBS Spec Publ 341 Proc Symp on Damage in Laser Mater
CityBoulder, Colo
Period6/24/706/25/70

ASJC Scopus subject areas

  • Engineering(all)

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