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Optics Letters

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  • Vol. 25, Iss. 1 — Jan. 1, 2000
  • pp: 49–51

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, and Mitsunobu Miyagi  »View Author Affiliations


Optics Letters, Vol. 25, Issue 1, pp. 49-51 (2000)
http://dx.doi.org/10.1364/OL.25.000049


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Abstract

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/cm<sup>2</sup>), 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 <i>in vitro</i>.

© 2000 Optical Society of America

OCIS Codes
(060.2390) Fiber optics and optical communications : Fiber optics, infrared
(140.3440) Lasers and laser optics : Laser-induced breakdown
(140.3540) Lasers and laser optics : Lasers, Q-switched
(170.1020) Medical optics and biotechnology : Ablation of tissue

Citation
Shunichi Sato, Hiroshi Ashida, Tsunenori Arai, Yi-Wei Shi, Yuji Matsuura, and Mitsunobu Miyagi, "Vacuum-cored hollow waveguide for transmission of high-energy, nanosecond Nd:YAG laser pulses and its application to biological tissue ablation," Opt. Lett. 25, 49-51 (2000)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-25-1-49


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References

  1. V. Sturm, R. Sattmann, and R. Noll, Appl. Phys. B 63, 363 (1996).
  2. B. Richou, I. Schertz, I. Gobin, and J. Richou, Appl. Opt. 36, 1610 (1997).
  3. Y. Matsuura, K. Hanamoto, S. Sato, and M. Miyagi, Opt. Lett. 23, 1858 (1998).
  4. S. Sato, H. Ashida, Y. Shi, Y. Matsuura, and M. Miyagi, Proc. SPIE 3596, 50 (1999).
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