, Volume 87, Issue 1, pp 41-45
Date: 24 Jan 2007

Laser irradiation induced disintegration of a bubble in a glass melt

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Abstract

We report on removal of micrometer-sized bubbles from molten glass by a 1064 nm wavelength cw-laser radiation focused using an objective lens of numerical aperture 0.55. The heating of a bubble and surrounding glass by tightly focused laser beam had reduced surface tension and caused disintegration of the bubble. Disintegration occurred at typically 1850±50 °C. Emission of a heated gas inside the bubble was used to determine the local temperature. Temporal evolution of the bubble disintegration was imaged by a CCD camera. Physics of the interaction between a focused laser beam and bubble is discussed.

PACS

47.55.Dz; 42.70.Ce; 44.90.+c; 47.27.Te; 47.90.+a