Fabrication and optical properties of single-crystal YAG fiber optics

Brian T. Laustsen; James A. Harrington

doi:10.1117/12.916181

15 February 2012 Fabrication and optical properties of single-crystal YAG fiber optics

Brian T. Laustsen, James A. Harrington

Proceedings Volume 8235, Solid State Lasers XXI: Technology and Devices; 823505 (2012) https://doi.org/10.1117/12.916181
Event: SPIE LASE, 2012, San Francisco, California, United States

Abstract

Single-crystal (SC) fiber optics have been grown for many years for use as passive fibers for the delivery of IR laser radiation and as active fibers useful as minirod lasers. By analogy with doped-YAG, bulk laser crystals it is expected that pure YAG SC fibers would be capable of transmitting extremely high laser energies. In this study we report on the growth of SC yttrium aluminum garnet, Y₃Al₅O₁₂ (YAG), fibers from undoped SC YAG source rods using the Laser Heated Pedestal Growth (LHPG) technique. The YAG transmits IR wavelengths up to approximately 4 μm which is a little beyond the transmission range for SC sapphire fibers. 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. The optical losses for 400-μm diameter YAG fibers have been measured to be about 1 dB/m at 2.94 μm. The longest length of YAG fiber grown has been about 65 cm.

Citation Download Citation

Brian T. Laustsen and James A. Harrington "Fabrication and optical properties of single-crystal YAG fiber optics", Proc. SPIE 8235, Solid State Lasers XXI: Technology and Devices, 823505 (15 February 2012); https://doi.org/10.1117/12.916181

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