The particulars of the action of a femtosecond laser beam on antimony-containing lithium-aluminum-silicate glass and the close to zero CLTE sitall obtained from this glass by heat-treatment were studied in a wide temperature range. In both the non-thermal and thermal laser action regimes local refractive index reduction is demonstrated in the laser modified regions of the sitall, reaching 0.002 in the non-thermal regime. The main reason for refractive index reduction is, by all appearances, partial amorphization of the crystal phase of β-eucryptite.
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This work was supported by the Russian Science Foundation (grant 19-19-00613).
Translated from Steklo i Keramika, No. 10, pp. 9 – 13, October, 2019.
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Sigaev, V.N., Lipat’ev, A.S., Fedotov, S.S. et al. Femtosecond Laser Modification of Antimony-Containing Lithium-Aluminum-Silicate Glass and Transparent Sitall Obtained from It. Glass Ceram 76, 370–373 (2020) doi:10.1007/s10717-020-00203-w
- index of refraction
- lithium-aluminum-silicate glass
- laser modification
- optical sitalls
- Raman scattering spectroscopy