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Proceedings Paper

Single-crystal YAG fiber optics for the transmission of high energy laser energy
Author(s): X. S. Zhu; James A. Harrington; B. T. Laustsen; L. G. DeShazer
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Paper Abstract

Single-crystal (SC) fibers have the potential of delivering extremely high laser energies. Sapphire fibers have been the most commonly studied SC fiber and the losses for sapphire fibers have been as low as 0.4 dB/m for a 300- micron core-only fiber at 3 microns. In this study we report on the growth of SC yttrium aluminum garnet, Y3Al5O12(YAG) fibers from undoped SC source rods using the Laser Heated Pedestal Growth (LHPG) technique. The advantage of YAG over sapphire is the slight improvement in IR transmission of YAG. The IR transmission of bulk YAG has been shown to extend to 5 μm where the absorption coefficient is 0.6 cm-1. The garnet family of crystals is one of the most commonly used oxide crystal hosts for lasing ions in high power solid-state lasers, with the most commercially common laser host being YAG. Thus, it is reasonable to assume that YAG fibers will have high laser damage thresholds. The optical losses for 400-μm diameter YAG fibers have been measured to be about 3 dB/m at 2.94 μm. The longest length of YAG fiber grown has been about 60 cm.

Paper Details

Date Published: 16 February 2011
PDF: 7 pages
Proc. SPIE 7894, Optical Fibers, Sensors, and Devices for Biomedical Diagnostics and Treatment XI, 789415 (16 February 2011); doi: 10.1117/12.881549
Show Author Affiliations
X. S. Zhu, Fudan Univ. (China)
Rutgers Univ. (United States)
James A. Harrington, Rutgers Univ. (United States)
B. T. Laustsen, Rutgers Univ. (United States)
L. G. DeShazer, Lightwave Energenics LLC (United States)

Published in SPIE Proceedings Vol. 7894:
Optical Fibers, Sensors, and Devices for Biomedical Diagnostics and Treatment XI
Israel Gannot, Editor(s)

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