High-Power All-Fiber Supercontinuum Laser Based on Germania-Doped Fiber

We demonstrated high power all-fiber
$2\sim 3~\mu \text{m}$
supercontinuum (SC) generation from a short piece of germania-doped fiber (GDF) pumped by a thulium-doped fiber amplifier (TDFA). As 39 W 2
$\mu \text{m}$
picosecond pulse launched into GDF, a mid-infrared SC laser with maximum average power of 33.6 W and broadband spectrum of
$1.8\sim 3.0~\mu \text{m}$
was achieved, which was the record SC power in
$2\sim 3~\mu \text{m}$
region based on GDF to date, to the best of the authors’ knowledge. The spectral broadening mechanism of the high-power SC generation were theoretical investigated by solving the generalized nonlinear Schrödinger equation (GNLSE).