Patent ID: 8538268
Filing Date: 2013-09-17
Classification: H04J

Abstract:
1. An optical signal demultiplexing device comprising: a first demultiplexer that receives an optical signal multiplexed by an optical time-division system and a synchronization pattern, and demultiplexes the optical signal based on the synchronization pattern; a plurality of wavelength converters each of which applies chirp to each of demultiplexed optical signals obtained by the first demultiplexer; a multiplexer that multiplexes optical signals obtained by the plurality of wavelength converters; a pulse-width increasing unit that collectively passes the optical signals multiplexed by the multiplexer, and increases the pulse widths of the optical signals by passing the optical signals through a wavelength dispersion medium; and a second demultiplexer that demultiplexes the optical signals that pass through the wavelength dispersion medium, wherein each of the plurality of wavelength converters passes the demultiplexed optical signal through a lithium niobate waveguide, and changes a refractive index of the lithium niobate waveguide, to generate the chirp in the optical signals.