Open AccessEfficient 240W single-mode 1018nm laser from an Ytterbium-doped 50/400µm all-solid photonic bandgap fiber
Author(s) -
Fanting Kong,
Guancheng Gu,
Thomas Hawkins,
Mervyn Jones,
Joshua Parsons,
Monica T. Kalichevsky-Dong,
Stephen P. Palese,
E. Cheung,
Liang Dong
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.003138
Subject(s) - materials science , fiber laser , ytterbium , optoelectronics , photonic crystal fiber , optics , laser , plastic clad silica fiber , laser power scaling , dispersion shifted fiber , double clad fiber , single mode optical fiber , fiber , doping , fiber optic sensor , physics , wavelength , composite material
Lowering the quantum defect by tandem pumping with fiber lasers at 1018nm was critical for achieving the record 10kW single-mode ytterbium fiber laser. Here we report the demonstration of an efficient directly-diode-pumped single-mode ytterbium fiber laser with 240W at 1018nm. The key for the combination of high efficiency, high power and single-mode at 1018nm is an ytterbium-doped 50μm/400μm all-solid photonic bandgap fiber, which has a practical all-solid design and a pump cladding much larger than those used in previous demonstrations of single-mode 1018nm ytterbium fiber lasers, enabling higher pump powers. Efficient high-power single-mode 1018nm fiber laser is critical for further power scaling of fiber lasers and the all-solid photonic bandgap fiber can potentially be a significant enabling technology.