Abstract
We propose and demonstrate a 1.50-µm-band gain-shifted thulium-doped fiber amplifier (TDFA) by using a novel dual wavelength (1.05/1.56 µm) pumping scheme for the first time. By providing a small amount of 1.56-µm power to the conventional TDFA, we successfully demonstrated a small-signal gain of >25 dB and a noise figure of 5 dB in the 1475- to 1510- nm band.
© 1999 Optical Society of America
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