Patent ID: 6229943
Filing Date: 2001-05-08
Classification: G02B

Abstract:
A wavelength router comprising:a plurality of input ports for inputting light signals;a plurality of input waveguides each having one end connected to a corresponding one of said input ports, respectively;a first plane waveguide connected to other ends of said input waveguides at respective first connection parts, said first plane waveguide having an output end face;a plurality of output ports for outputting light signals;a plurality of output waveguides each having one end connected to a corresponding one of said output ports, respectively;a second plane waveguide connected to other ends of said output waveguides, said second plane waveguide having an input end face;a plurality of interconnecting waveguides connecting said output end face of said first plane waveguide and said input end face of said second plane waveguide, said interconnecting waveguides having respective lengths equal to one another;wherein optical path lengths of a plurality of light propagation paths from said first connection parts between said input waveguides and said first plane waveguide, respectively, to second connection parts between said interconnecting waveguides and said second plane waveguide, respectively, differ from one another so as to provide different phases to the light signals.