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Proceedings Paper

Transmission of free-running and Q-switched erbium: YSGG laser radiation through sapphire and germanium fibers
Author(s): Nathaniel M. Fried; Yubing Yang; Charles A. Chaney; Daniel Fried
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Paper Abstract

The Erbium:YAG (λ = 2.94 μm) and Erbium: YSGG (λ = 2.79 μm) laser are currently being used for tissue ablation in several medical specialties, including dermatology, ophthalmology and dentistry. Some of these applications may benefit from the availability of an optical fiber capable of delivering sufficient short-pulse, Q-switched Erbium laser energy for precise and rapid ablation of hard and soft tissues. Fiber transmission studies were conducted using both free-running (300 μs) and Q-switched (500 ns) Er:YSGG laser pulses delivered at 3 Hz through 1-meter-long samples of 450-μm germanium oxide and 425-μm sapphire optical fibers. Fiber optic transmission of free-running Er:YSGG laser radiation averaged 76% and 88% for the germanium and sapphire fibers (n = 7), respectively. Transmission of Q-switched Er:YSGG laser radiation averaged 57% and 65% for the germanium and sapphire fibers (n = 7) , respectively. Fiber optic transmission of Q-switched pulse energies as high as 42 mJ was achieved through the fibers. However, damage at the input ends of the fibers began to occur at input / output pulse energies above 40 mJ / 25 mJ (n = 2), respectively. Both germanium oxide and sapphire optical fibers are capable of transmitting sufficient free-running and Q-switched Er:YSGG laser radiation for hard and soft tissue ablation.

Paper Details

Date Published: 10 June 2004
PDF: 4 pages
Proc. SPIE 5317, Optical Fibers and Sensors for Medical Applications IV, (10 June 2004); doi: 10.1117/12.526962
Show Author Affiliations
Nathaniel M. Fried, Johns Hopkins Medical Institutions (United States)
Yubing Yang, Johns Hopkins Medical Institutions (United States)
Charles A. Chaney, Johns Hopkins Medical Institutions (United States)
Daniel Fried, Univ. of California/San Francisco (United States)

Published in SPIE Proceedings Vol. 5317:
Optical Fibers and Sensors for Medical Applications IV
Israel Gannot, Editor(s)

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