Er3+-Doped Fiber Amplifier Pumped by 0.98 pm Laser Diodes

Absrmct-Performance of an Er"-doped fiber amplifier pumped by 0.98 pm LD's is reported in detail. The highest signal gain of 37.8 dB at 30 mW pumping power was realized at a signal wavelength of 1.536 pm. Fhrthermore, a high gain coefficient of 1.9 dBhW was achieved, which was twice as efficient as that pumped by 1.48 ,un LD's.