T. Kasamatsu et al., Laser-diode-pumped highly efficient gain-shifted thulium-doped fiber amplifier operating in the 1480-1510-nm band, IEEE PHOTON, 13(5), 2001, pp. 433-435
We have developed a gain-shifted thulium-doped fiber amplifier (TDFA) with
a high-optical efficiency (29%) and a high-output power (+21.5 dBm) operati
ng in the 1480-1510-nm wavelength band by employing a novel laser-diode pum
ping scheme of 1.4 and 1.56 mum The results we obtained confirm the feasibi
lity of applying our gain-shifted TDFA to practical wavelength-division-mul
tiplexing (WDM) networks.