Patent ID: 6768578
Filing Date: 2004-07-27
Classification: H01S,H04B

Abstract:
An apparatus comprising:a demultiplexer demultiplexing a wavelength division multiplexed (WDM) light into first and second lights corresponding to different wavelengths in the WDM light; a first amplification stage amplifying the first light, variably attenuating the amplified first light, providing dispersion compensation to the attenuated, amplified first light, and amplifying the dispersion compensated first light, to output a first stage light; a second amplification stage amplifying the second light, variably attenuating the amplified second light, providing dispersion compensation to the attenuated, amplified second light, and amplifying the dispersion compensated second light, to output a second stage light; and a multiplexer multiplexing the first and second stage lights together.