Vacuum-cored hollow waveguide for transmission of high-energy, nanosecond Nd: YAG laser pulses and its application to biological tissue ablation

Shunichi Sato, Hiroshi Ashida, Tsunenori Arai, Yi Wei Shi, Yuji Matsuura, Mitsunobu Miyagi

Research output: Contribution to journalArticle

37 Citations (Scopus)


A vacuum-cored hollow waveguide has been found to transmit 1064-nm, Q-switched Nd:YAG laser pulses. With this scheme, laser-induced air breakdown was completely suppressed, and the laser-induced damage threshold of the waveguide's inner coating was significantly increased. With a 1-m-long, 1-mm inner-diameter, cyclic olefin polymer-coated silver hollow waveguide, the maximum transmitted laser energy was as great as 158 mJ/pulse (20.1 J/cm2), at a repetition rate of 10 Hz in a 90°-bent waveguide condition. The corresponding transmitted peak laser power was 17.6 MW. With the transmitted laser pulses, deep ablation of myocardium tissues was demonstrated in vitro.

Original languageEnglish
Pages (from-to)49-51
Number of pages3
JournalOptics Letters
Issue number1
Publication statusPublished - 2000 Jan 1
Externally publishedYes


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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