A novel structure of two-stage EDFA pumped by C-band and 980 nm LD for gain enhancement of L-band signal was investigated via experiments and numerical calculation. C-band light was controlled by erbium-doped fiber laser. The influence of C-band power and wavelength on gain of L-band was analyzed principally. In the experiment, with an injection of 5 mW at 1525 nm, the gain enhancement of 7.7 dB for -20 dBm signal power at 1580 nm was achieved.