Open AccessHigh-power Yb-doped photonic bandgap fiber amplifier at 1150-1200 nm
Author(s) -
Akira Shirakawa,
Hiroki Maruyama,
Ken–ichi Ueda,
Christina B. Olausson,
Jens K. Lyngsø,
Jes Broeng
Publication year - 2009
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.000447
Subject(s) - materials science , optoelectronics , lasing threshold , optics , amplified spontaneous emission , fiber laser , photonic crystal , ytterbium , band gap , photonics , optical amplifier , doping , wavelength , laser , physics
Ytterbium-doped solid-core photonic bandgap fiber amplifiers operating at the long-wavelength edge of the ytterbium gain band are reported. The low-loss bandgap transmission window is formed in the very low gain region, whilst outside the bandgap, large attenuation inhibits the exponential growth of amplified spontaneous emission in the huge-gain 1030-1100 nm region. Hence parasitic-lasing-free, high-power amplification with a marked efficiency is enabled. A 32 W output at 1156 nm with a 66% slope efficiency and 30 W output at 1178 nm with a 58% slope efficiency were successfully obtained. To our knowledge, these are the highest output powers generating from active photonic bandgap fibers, as well as from ytterbium-doped fiber lasers at these wavelengths.