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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 13 — Jun. 30, 2014
  • pp: 15686–15696

High peak power Q-switched Er:YAG laser with two polarizers and its ablation performance for hard dental tissues

Jingwei Yang, Li Wang, Xianyou Wu, Tingqing Cheng, and Haihe Jiang  »View Author Affiliations


Optics Express, Vol. 22, Issue 13, pp. 15686-15696 (2014)
http://dx.doi.org/10.1364/OE.22.015686


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Abstract

An electro-optically Q-switched high-energy Er:YAG laser with two polarizers is proposed. By using two Al2O3 polarizing plates and a LiNbO3 crystal with Brewster angle, the polarization efficiency is significantly improved. As a result, 226 mJ pulse energy with 62 ns pulse width is achieved at the repetition rate of 3 Hz, the corresponding peak power is 3.6 MW. To our knowledge, such a high peak power has not been reported in literature. With our designed laser, in-vitro teeth were irradiated under Q-switched and free-running modes. Results of a laser ablation experiment on hard dental tissue with the high-peak-power laser demonstrates that the Q-switched Er:YAG laser has higher ablation precision and less thermal damage than the free-running Er:YAG laser.

© 2014 Optical Society of America

OCIS Codes
(140.3500) Lasers and laser optics : Lasers, erbium
(140.3540) Lasers and laser optics : Lasers, Q-switched
(170.1850) Medical optics and biotechnology : Dentistry
(140.3538) Lasers and laser optics : Lasers, pulsed

ToC Category:
Medical Optics and Biotechnology

History
Original Manuscript: April 14, 2014
Revised Manuscript: June 13, 2014
Manuscript Accepted: June 14, 2014
Published: June 19, 2014

Virtual Issues
Vol. 9, Iss. 8 Virtual Journal for Biomedical Optics

Citation
Jingwei Yang, Li Wang, Xianyou Wu, Tingqing Cheng, and Haihe Jiang, "High peak power Q-switched Er:YAG laser with two polarizers and its ablation performance for hard dental tissues," Opt. Express 22, 15686-15696 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-13-15686


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