Petersen, Sidsel Rübner1; Chen, Mingchen3; Shirakawa, Akira3; Olausson, Christina Bjarnal Thulin4; Alkeskjold, Thomas Tanggaard4; Lægsgaard, Jesper1
1 Department of Photonics Engineering, Technical University of Denmark2 Fiber Optics, Devices and Non-linear Effects, Department of Photonics Engineering, Technical University of Denmark3 University of Electro-Communications4 NKT Photonics A/S
Amplification of 1178 nm light is demonstrated in a large-mode-area single-mode ytterbium-doped hybrid photonic crystal fiber, relying on distributed spectral filtering of spontaneous emission at shorter wavelengths. An output power of 53 W is achieved with 29 dB suppression of parasitic lasing. Further power scaling is limited by parasitic lasing.
Optics Letters, 2015, Vol 40, Issue 8, p. 1741-1744