Tuned alexandrite laser for dentistry

Jan Sulc; Helena Jelinkova; Tatjana Dostalova M.D.; Mitsunobu Miyagi

doi:10.1117/12.382783

14 April 2000 Tuned alexandrite laser for dentistry

Jan Sulc, Helena Jelinkova, Tatjana Dostalova M.D., Mitsunobu Miyagi

Proceedings Volume 3929, Solid State Lasers IX; (2000) https://doi.org/10.1117/12.382783
Event: Symposium on High-Power Lasers and Applications, 2000, San Jose, CA, United States

Abstract

For medical applications tunable solid state laser system emitting a visible light in a region from 710 to 775 nm was developed. Laser head of this system was composed of alexandrite crystal rod (4 mm in diameter, 90 mm of length), two dielectric mirrors and tuning element (dispersing prism or thin-film polarizer). For Q-switching, three different optics shutters were proved: a saturable NC-dye or LiF crystal, LiNbO₃ Pockels cell, and rotating prism. Maximum output energy in free-running and Q-switching regime was 400 mJ and 70 mJ, respectively. The pulse duration was 70 microsecond(s) in the free-running and 45 - 250 ns in Q-switching regime. The output free running laser radiation was guided via a multimode quartz fiber (1 m of length, core diameter 600 micrometers ) or via a special fluorocarbon polymer-coated silver hollow glass waveguide (0.62 m of length, inner diameter 1 mm). At first, this radiation with a laser fluence of 2.5 J/cm² was used for an ablation of a dental calculus. Next, the laser radiation propagation in a root canal and its effect on bacteria was proved. The dissipated energy measurement was made inside and outside of the tooth. From the results follow that the alexandrite laser could be useful for medical applications.

Citation Download Citation

Jan Sulc, Helena Jelinkova, Tatjana Dostalova M.D., and Mitsunobu Miyagi "Tuned alexandrite laser for dentistry", Proc. SPIE 3929, Solid State Lasers IX, (14 April 2000); https://doi.org/10.1117/12.382783

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