Vacuum-cored hollow waveguide for high-energy, high-intensity laser transmission and its application to biological tissue ablation

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

Research output: Chapter in Book/Report/Conference proceedingChapter

2 Citations (Scopus)

Abstract

To suppress the laser-induced air breakdown which limited the transmission of 1064-nm Q-switched Nd:YAG laser pulses through hollow waveguide, a vacuum cell was attached to the waveguide ends, where the air was expelled from the cells as well as from the waveguide core region. With this scheme, the laser-induced air breakdown was completely suppressed, and in addition, the laser-induced damage threshold of the waveguide coating materials was significantly increased. With a 1-mm inner diameter, 1-m long, cyclic-olefin-polymer (COP)-coated silver hollow waveguide, a maximum transmitted laser energy reached approx. 200 mJ/pulse at 10 Hz in a straight waveguide condition. In a 90°-bent waveguide condition the laser-induced damage to the waveguide inner coating was observed, but a maximum transmitted energy in excess of 150 mJ/pulse at 10 Hz was obtained without any damage. With the transmitted laser pulses, sharp ablation in porcine myocardium tissues was demonstrated in vitro.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSPIE
Pages298-302
Number of pages5
Volume3911
Publication statusPublished - 2000
Externally publishedYes
EventBiomedical Diagnostic, Guidance, and Surgical-Assist Systems II - San Jose, CA, USA
Duration: 2000 Jan 252000 Jan 26

Other

OtherBiomedical Diagnostic, Guidance, and Surgical-Assist Systems II
CitySan Jose, CA, USA
Period00/1/2500/1/26

Fingerprint

Ablation
high power lasers
ablation
hollow
Waveguides
Vacuum
Tissue
waveguides
vacuum
Lasers
lasers
Laser pulses
Laser damage
energy
pulses
air
Air
breakdown
damage
coatings

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Sato, S., Arai, T., Shi, Y. W., Matsuura, Y., Miyagi, M., & Ashida, H. (2000). Vacuum-cored hollow waveguide for high-energy, high-intensity laser transmission and its application to biological tissue ablation. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3911, pp. 298-302). SPIE.

Vacuum-cored hollow waveguide for high-energy, high-intensity laser transmission and its application to biological tissue ablation. / Sato, Shunichi; Arai, Tsunenori; Shi, Yi Wei; Matsuura, Yuji; Miyagi, Mitsunobu; Ashida, Hiroshi.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3911 SPIE, 2000. p. 298-302.

Research output: Chapter in Book/Report/Conference proceedingChapter

Sato, S, Arai, T, Shi, YW, Matsuura, Y, Miyagi, M & Ashida, H 2000, Vacuum-cored hollow waveguide for high-energy, high-intensity laser transmission and its application to biological tissue ablation. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 3911, SPIE, pp. 298-302, Biomedical Diagnostic, Guidance, and Surgical-Assist Systems II, San Jose, CA, USA, 00/1/25.
Sato S, Arai T, Shi YW, Matsuura Y, Miyagi M, Ashida H. Vacuum-cored hollow waveguide for high-energy, high-intensity laser transmission and its application to biological tissue ablation. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3911. SPIE. 2000. p. 298-302
Sato, Shunichi ; Arai, Tsunenori ; Shi, Yi Wei ; Matsuura, Yuji ; Miyagi, Mitsunobu ; Ashida, Hiroshi. / Vacuum-cored hollow waveguide for high-energy, high-intensity laser transmission and its application to biological tissue ablation. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3911 SPIE, 2000. pp. 298-302
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