Fujitsu Patent Center
Optical add/drop multiplexer and method for adding/dropping optical signal
OADM processes input light containing reference light and multiplexed optical signals. A splitter splits the input light to generate first and second input light. A receiver generates an electric signal representing the second input light. An estimator estimates a difference in optical frequency between the reference light and a specified optical signal based on the electric signal. Alight source generates first and second light. An optical frequency of the second light is shifted by the estimated difference with respect to that of the first light. A demodulator generates a dropped signal representing the specified optical signal. A drive signal generator generates a drive signal in accordance with an inverted signal of the dropped signal. A modulator modulates the second light with the drive signal to generate a modulated optical signal. The first input light, the first light and the modulated optical signal are input to non-linear optical medium.
FUJITSU LIMITED
H H H H H
H04B H04B H04J H04J H04B
inventional additional inventional inventional inventional
Tomoyuki Shigeki
Kato Watanabe