Toward visible cw-pumped supercontinua.
We report a 1 mum cw-pumped supercontinuum that extends short of the pump wavelength to 0.65 mum. This is achieved by using a 50 W Yb fiber laser in combination with a photonic crystal fiber with a carefully engineered zero-dispersion wavelength. We show that the short-wavelength generation is due to a combination of four-wave mixing and dispersive wave trapping by solitons. The evolution and limiting factors of the continuum are discussed.
Cumberland
B A
BA
Femtosecond Optics Group, Imperial College London, London, UK. b.cumberland05@imperial.ac.uk
Travers
J C
JC
Popov
S V
SV
Taylor
J R
JR