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Proceedings Paper

Growth And Optical Properties Of Single-Crystal Sapphire Fibers
Author(s): D. H. Jundt; M. M. Fejer; R. L. Byer
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Paper Abstract

Sapphire single-crystal fibers are very promising for applications in high power laser delivery systems operating in the mid-infrared, e.g. the Er:YAG line at 2.9 μm. The fibers are nontoxic and chemically resistant. Also, they are mechanically strong and can be bent to a radius of less than 10 mm without breaking. Fibers with diameters of 110 μm and lengths of up to 1 m were grown by the laser-heated pedestal growth method. The minimum loss of 0.5 dB/m was measured in the near infrared at 1064 nm. An absorption band centered at 400 nm resulted in losses of up to 20 dB/m. Absorption loss at the Er:YAG line is 0.88 dB/m for a fiber grown in an atmosphere of pure oxygen. A damage threshold higher than 1.2 kJ/cm2 was measured for 110 μs long pulses, making tissue ablation feasible with fibers several meters long.

Paper Details

Date Published: 2 June 1989
PDF: 7 pages
Proc. SPIE 1048, Infrared Fiber Optics, (2 June 1989); doi: 10.1117/12.951379
Show Author Affiliations
D. H. Jundt, Stanford University (United States)
M. M. Fejer, Stanford University (United States)
R. L. Byer, Stanford University (United States)

Published in SPIE Proceedings Vol. 1048:
Infrared Fiber Optics
James A. Harrington; Abraham Katzir, Editor(s)

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