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Proceedings Paper

Power scaling of the in-band diode-pumped Er-nanoparticle-doped fiber laser (Conference Presentation)

Paper Abstract

Successful power scaling of the Er-doped fiber laser heavily depends on Er dopant concentration. In order to scale the power up to a kW class, core absorption should be well over the limits defined by current commercial doping techniques. Recently developed nanoparticle (NP) doping technique of fabrication of erbium-doped fibers allows the desired dopant concentration increases while mitigating both Er upconversion and clustering effects. Here we present the latest resonantly-pumped Er fiber laser power scaling results enabled by further development of the NP doping technique of Er-doped fiber fabrication. Using resonantly cladding-pumped (at 1530 nm) large mode area 20/125 µm fiber with the Er-NP-doped core we achieved pump-limited CW power of over 30 W at ~1605 nm with the slope efficiency versus absorbed pump power of ~63%. These are, to the best of our knowledge, the highest power and efficiency demonstrated so far for from the Er-NP-doped fiber. Further considerations on fiber design optimization are presented as well.

Paper Details

Date Published: 14 March 2018
Proc. SPIE 10528, Optical Components and Materials XV, 1052803 (14 March 2018); doi: 10.1117/12.2296922
Show Author Affiliations
Jun Zhang, U.S. Army Research Lab. (United States)
Radha K. Pattnaik, U.S. Army Research Lab. (United States)
Mark Dubinskii, U.S. Army Research Lab. (United States)
Colin C. Baker, U.S. Naval Research Lab. (United States)
E. Joseph Friebele, Sotera Defense Solutions (United States)
Ashley A. Burdett, Univ. Research Foundation (United States)
Woohong Kim, U.S. Naval Research Lab. (United States)
Jasbinder S. Sanghera, U.S. Naval Research Lab. (United States)

Published in SPIE Proceedings Vol. 10528:
Optical Components and Materials XV
Shibin Jiang; Michel J. F. Digonnet, Editor(s)

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