Patent ID: 6760150
Filing Date: 2004-07-06
Classification: H01S

Abstract:
An optical transmitting apparatus comprising:a first optical amplifier amplifying a wavelength division multiplexed (WDM) optical signal to thereby output an output optical signal by which quality is changed, independent of a number of WDM channels in the WDM optical signal, according to amplification gain of the first optical amplifier; a second optical amplifier amplifying the output optical signal from the first optical amplifier, to thereby output a WDM optical signal from the second optical amplifier having quality changed according to an input level to the second optical amplifier of the output optical signal from the first optical amplifier; and a controller for performing an adaptive control on the amplification gain of the first optical amplifier so that average quality per WDM channel of the WDM optical signal output from the second optical amplifier becomes maximum.