Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7907509 | Optical Materials | 2018 | 5 Pages |
Abstract
A method to grow single crystal (SC) yttrium aluminum garnet (YAG) fibers with varied rare-earth ion dopant concentration has been proposed. Crystalline holmium aluminum garnet (HoAG), prepared via sol-gel process, was dip-coated on to previously grown SC YAG fibers. The HoAG coated SC YAG fiber preforms were re-grown to a smaller diameter using the laser heated pedestal growth (LHPG) technique. The final dopant concentration of the re-grown SC fiber was varied by changing the number of HoAG coatings on the preform. 120 μm diameter SC Ho:YAG fibers with four different dopant concentrations were grown. Lasing was demonstrated at 2.09 μm for these fibers. A maximum of 58.5% optical-to-optical slope efficiency was obtained.
Related Topics
Physical Sciences and Engineering
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Authors
Subhabrata Bera, Craig D. Nie, Michael G. Soskind, Yuan Li, James A. Harrington, Eric G. Johnson,