Wide-band optical fiber amplifier and amplifying method thereof

摘要

The invention is directed to a wide-band optical fiber amplifier system and a method for amplifying the optical signals of 1550nm wavelength band and 1580nm wavelength band in a wide-band optical fiber amplifier. The inventive method comprises the steps of separating the incoming optical signals into 1550nm wavelength band and 1580nm wavelength band, respectively amplifying the optical signals of the 1550nm wavelength band, and those of the 1580nm wavelength band, and supplying the backward ASE generated in amplifying the optical signals of the 1550nm wavelength band as a supplementary pumping light to the amplification of the optical signals of the 1580nm wavelength band.