Dual-Pumped Tellurite Fiber Amplifier and Tunable Laser Using Er$^{3+}$ /Ce$^{3+}$ Codoping Scheme

We have demonstrated a high-performance Er
³⁺
/Ce
³⁺
codoped tellurite fiber amplifier and tunable fiber laser using a dual-pumping scheme. The short 22-cm Er
³⁺
/Ce
³⁺
ion codoped fiber exhibits a net gain of 28 dB at 1558 nm, a wide positive net gain bandwidth of 122 nm, and a noise figure of 4.1 dB. Finally, a widely tunable Er
³⁺
/Ce
³⁺
codoped tellurite fiber ring laser with a tuning range of 83 nm is demonstrated.