Laser induced changes of refractive index of lead - silicate glasses
Conference
·
OSTI ID:552199
- S.I. Vavilov State Optical Institute, St. Petersburg (Russian Federation)
The mechanisms of photoinduced changes of refractive index of the T{Phi} lead - silicate glasses (analogous with the SF glasses from Schott catalog) under the effect of high power laser radiation with quantum energy less bandgap have been studied. It is shown that the laser induced color centers results in increase of refractive index into the exposed bulk during the laser pulse action. This leads to considerable redistribution of irradiance and decrease of laser radiation brightness even in the case of optical elements less 1 mm thickness. The observed effect may be connected both with radiation induced dilatation of matter and heating of interaction region owing to absorption of radiation by color centers. Comparison the kinetics of refractive index change of the glass after exposure by laser pulse at 0.53 {mu}m and the kinetics of color centers decay allowed to draw a conclusion about heat character of observed changes.
- Research Organization:
- International Society for Optical Engineering, Washington, DC (United States)
- OSTI ID:
- 552199
- Report Number(s):
- CONF-9410155--Vol.2428
- Country of Publication:
- United States
- Language:
- English
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