Gain characteristics of thulium-doped tellurite fiber amplifiers by dual-wavelength (800nm+1064 nm) pumping

摘要

We demonstrate that simultaneously pumping a thulium-doped tellurite fiber amplifier with 800nm and 1064nm significantly increases the achievable gain. A gain of 26dB and noise figure less than 4dB were obtained with a 1.5m doped fiber length.