Abstract

The strong absorption of tissue water is responsible for the low ablation threshold for biological tissues at the Er:YAG and Er:YSGG laser wavelengths. These lasers are therefore considered to be promising tools for medical treatments. As the existing transmission systems are still unsatisfactory, three types of liquid-filled light guides are investigated here as alternatives to conventional near-IR fibers. In addition to mechanical advantages, the minimum attenuation is below 3 dB/m, and losses at bending radii down to 20 mm are negligible. The maximum output energy densities of 14.2 J/cm2 (free-running Er:YAG) or power densities of 7 MW/cm2 (Q-switched Er:YAG) are sufficient for soft-tissue ablation. When the liquid was circulated, much higher energy densities, exceeding the hard-tissue ablation threshold, were achieved. These properties make liquid-core light guides promising delivery systems for many near-IR applications, including medical ones.

© 1997 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Flexible delivery of Er:YAG radiation at 2.94 µm with negative curvature silica glass fibers: a new solution for minimally invasive surgical procedures

A. Urich, R. R. J. Maier, Fei Yu, J. C. Knight, D. P. Hand, and J. D. Shephard
Biomed. Opt. Express 4(2) 193-205 (2013)

Delivery of high energy Er:YAG pulsed laser light at 2.94µm through a silica hollow core photonic crystal fibre

A. Urich, R. R. J. Maier, B. J. Mangan, S. Renshaw, J. C. Knight, D. P. Hand, and J. D. Shephard
Opt. Express 20(6) 6677-6684 (2012)

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
Opt. Lett. 25(1) 49-51 (2000)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (3)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (2)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription