Temperature-Dependent Gain Variation Reduction in$C$-Band Erbium-Doped Fiber Amplifier Using Phosphorus-Erbium-Doped Silica Fiber

摘要

We propose a new technique to reduce the temperature-dependent gain (TDG) tilt of erbium-doped fiber amplifier in the$C$-band by supplying a composite optical gain block, conventional aluminum-rich erbium-doped fiber (EDF) serially concatenated with a special EDF composed of phosphorus-doped silica host, which showed opposite TDG coefficients in the$C$-band. The TDG variation was suppressed to less than$pm$0.45 dB for the saturated gain of 16 dB in 1525–1565 nm, within the temperature range of$ -$40$^circ$C to$+$80$^circ$C.