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Proceedings Paper

Q-switching of mid-infrared Er:YAG laser and its radiation delivery system
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Paper Abstract

Q-switching of mid-infrared Er:YAG laser was obtained with an electro-optical shutter. For that the LiNbO3 Pockels cell was used in transversal quarter-wave arrangement with the Brewster angle cut faces used as a polarizer. Parameters and dependences of this Q-switched system were investigated, i.e. a pulse length and generated pulse energy, delay between switching of flashlamp and Q-switch circuit, high voltage applied on Pockels cell were measured and optimized. The resulted giant pulse length and energy was 60 ns and 55 mJ, respectively. This generated pulse was obtained for the applied voltage around 1.4 kV and for the optimum delay value 450 us. Problem of mid-infrared giant pulse delivery, which is needed for various technological applications, was solved by a specially designed cyclic olefin polymer coated silver hollow glass (COP/Ag) waveguide. Parameters of this waveguide were: diameter 700/850 um and length 1 m. The measured transmission was 74 % which corresponded to delivered intensity 86 MW/cm2. Q-switched Er:YAG laser radiation in connection with this special delivery system gives a possibility of the surgical treatment in many medicine branches, for example ophthalmology, urology or dentistry.

Paper Details

Date Published: 1 September 2004
PDF: 10 pages
Proc. SPIE 5460, Solid State Lasers and Amplifiers, (1 September 2004); doi: 10.1117/12.544817
Show Author Affiliations
Helena Jelinkova, Czech Technical Univ. (Czech Republic)
Petr Koranda, Czech Technical Univ. (Czech Republic)
Michal Nemec, Czech Technical Univ. (Czech Republic)
Jan Sulc, Czech Technical Univ. (Czech Republic)
Miroslav Cech, Czech Technical Univ. (Czech Republic)
Mitsunobu Miyagi, Tohoku Univ. (Japan)
Yi-Wei Shi, Tohoku Univ. (Japan)
Yuji Matsuura, Tohoku Univ. (Japan)


Published in SPIE Proceedings Vol. 5460:
Solid State Lasers and Amplifiers
Alphan Sennaroglu; James G. Fujimoto; Clifford R. Pollock, Editor(s)

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