AN OPTICAL WAVELENGTH-DIVISION SWITCHING SYSTEM

摘要

An optical wavelength-division switching system comprises means for reproducing an electric signal for each channel from a wavelength division multiplexed optical signal (110), and means for converting the electric signal to a modulated optical signal (20). The means for reproducing the electric signal can be composed of an optical heterodyne or homodyne detection system (151-154), while the means for converting the electric signal can be composed of a distributed feedback laser diode (151-164), having an optical frequency modulating characteristic so that the number of channels is much increased with the decrease of crosstalk.