We propose and demonstrate a 1.50-μm- band gain-shifted thulium-doped fiber amplifier (TDFA) by using a novel dual-wavelength (1.05and1.56 -μm) pumping scheme for what we believe is the first time. By providing a small amount of 1.56-μm power to a conventional upconversion-pumped TDFA, we successfully demonstrated a small-signal gain larger than 25 dB and a noise figure of 5 dB in a 1475–1510-nm band.
© 1999 Optical Society of America
Tadashi Kasamatsu, Yutaka Yano, and Hitoshi Sekita, "1.50-μm-band gain-shifted thulium-doped fiber amplifier with 1.05- and 1.56-μm dual-wavelength pumping," Opt. Lett. 24, 1684-1686 (1999)