Generation of powerful 3 microns radiation and its delivery

Miroslav Čech, Michal Němec, Petr Koranda, Helena Jelínková, Mitsunobu Miyagi, Katsumasa Iwai, Yi Wei Shi, Yuji Matsuura

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

In some last years mid-infrared EnYAG laser radiation (2940 nm) found the exploitation in many applications in technology and especially in various medical branches (dentistry, dermatology, cardiology, ophthalmology). Most of them use the EnYAG laser system working in free-running regime generating the pulses with the length of some hundreds of microseconds. In the presented work we concentrated on the development and optimization of electro-optically Q-switched EnYAG laser and suitable delivery system. Er:YAG laser operated both in free-running or Q-switched regime was developed and optimized. LiNbO 3 Pockels cell was utilized for Q-switching the Er:YAG laser. Single giant pulses with maximal energy 67 mJ and minimal duration 53 ns FWHM were generated for maximal pump energy 131 J and for the optimal Pockels cell parameters (high voltage value 1.4 kV, delay of Pockels cell switching after the flashlamp trigger 450 μs). The Er:YAG laser radiation was effectively delivered by the special COP/Ag hollow glass waveguides with inner/outer diameters 700/850 μm or 320/450 μm, and length from 10 cm up to 1 m. The transmission of the used waveguides was measured to be from 73% to 84% according to waveguide type. With the help of delivery systems, the EnYAG laser radiation (in the form of long pulses for free-running regime or short pulses for Q-switched regime) was applied to various biological tissue samples to study the basic laser radiation - tissue interactions and treatment possibilities.

本文言語English
ホスト出版物のタイトルSolid State Lasers and Amplifiers II
DOI
出版ステータスPublished - 2006
イベントSolid State Lasers and Amplifiers II - Strasbourg, France
継続期間: 2006 4月 52006 4月 6

出版物シリーズ

名前Proceedings of SPIE - The International Society for Optical Engineering
6190
ISSN(印刷版)0277-786X

Other

OtherSolid State Lasers and Amplifiers II
国/地域France
CityStrasbourg
Period06/4/506/4/6

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学

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