Ho-nanoparticle-doping for improved high-energy laser fibers

E. Joseph Friebele; Colin C. Baker; Ashley A. Burdett; Daniel L. Rhonehouse; Steven R. Bowman; Woohong Kim; Jasbinder S. Sanghera; Courtney Kucera; Amber Vargas; John Ballato; Alexander Hemming; Nikita Simakov; John Haub

doi:10.1117/12.2255775

7 March 2017 Ho-nanoparticle-doping for improved high-energy laser fibers

E. Joseph Friebele, Colin C. Baker, Ashley A. Burdett, Daniel L. Rhonehouse, Steven R. Bowman, Woohong Kim, Jasbinder S. Sanghera, Courtney Kucera, Amber Vargas, John Ballato, Alexander Hemming, Nikita Simakov, John Haub

Author Affiliations +

Proceedings Volume 10100, Optical Components and Materials XIV; 1010003 (2017) https://doi.org/10.1117/12.2255775
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

A significant issue for holmium-doped fiber lasers (HoDFLs) operating near 2 μm is multiphonon quenching due to the high phonon energy ~1100 cm^-1 of the silica host, which complicates power scaling due to reduced lifetimes and increased heating. Nanoparticle (NP) doping is a new technique where the structure surrounding the Ho ions is developed chemically prior to doping into the silica core. We have incorporated Ho³⁺ ions into various NPs, such as LaF₃, Al₂O₃ and Lu₂O₃, to shield them from the silica glass matrix. Results indicate slightly longer lifetimes with Ho:LaF₃ NPs and the possibility of further improvement with oxide NPs. We report the first of lasing in a Ho:Lu₂O₃ NP-doped fiber pumped at 1.95 μm and operating at 2.09 μm with a record slope efficiency of 85.2%.

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E. Joseph Friebele, Colin C. Baker, Ashley A. Burdett, Daniel L. Rhonehouse, Steven R. Bowman, Woohong Kim, Jasbinder S. Sanghera, Courtney Kucera, Amber Vargas, John Ballato, Alexander Hemming, Nikita Simakov, and John Haub "Ho-nanoparticle-doping for improved high-energy laser fibers", Proc. SPIE 10100, Optical Components and Materials XIV, 1010003 (7 March 2017); https://doi.org/10.1117/12.2255775

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