Processing and characterization of polycrystalline YAG (Yttrium Aluminum Garnet) core-clad fibers

Hyun Jun Kim; Geoff E. Fair; Santeri A. Potticary; Matthew J. O'Malley; Nicholas G. Usechak

doi:10.1117/12.2050871

9 June 2014 Processing and characterization of polycrystalline YAG (Yttrium Aluminum Garnet) core-clad fibers

Hyun Jun Kim, Geoff E. Fair, Santeri A. Potticary, Matthew J. O'Malley, Nicholas G. Usechak

Proceedings Volume 9081, Laser Technology for Defense and Security X; 908103 (2014) https://doi.org/10.1117/12.2050871
Event: SPIE Defense + Security, 2014, Baltimore, MD, United States

Abstract

Polycrystalline YAG fiber has recently attracted considerable attention for the role it could play as a fiber-laser gain media. This primarily due to its large surface-to-volume ratio, high stimulated Brillouin scattering threshold, and its high thermal conductivity; all of which are superior to that of silica-glass fibers. As a consequence, techniques which enable the fabrication of poly- and single-crystalline YAG fibers have recently been the focus of a number of efforts. In this work we have endeavored to reduce the scattering loss of polycrystalline-YAG-core fibers while simultaneously demonstrating optical gain by enhancing our processing techniques using feedback from mechanical testing and through the development of a technique to encase doped YAG-core fibers with un-doped YAG claddings. To this end we have recently fabricated fibers with both core and claddings made up of polycrystalline YAG and subsequently confirmed that they indeed guide light. In this paper, the processes leading to the fabrication of these fibers will be discussed along with their characterization.

Citation Download Citation

Hyun Jun Kim, Geoff E. Fair, Santeri A. Potticary, Matthew J. O'Malley, and Nicholas G. Usechak "Processing and characterization of polycrystalline YAG (Yttrium Aluminum Garnet) core-clad fibers", Proc. SPIE 9081, Laser Technology for Defense and Security X, 908103 (9 June 2014); https://doi.org/10.1117/12.2050871

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