Patent ID: 6272270
Filing Date: 2001-08-07
Classification: G02B

Abstract:
An optical wave combining/splitting device comprising:a first input/output port;a period characteristic wavelength splitter that is connected to the first input/output port;a diffraction grating wavelength splitter comprised of arrayed waveguides that is connected to the period characteristic wavelength splitter; anda second input/output port comprised of multiple ports that is connected to the diffraction grating wavelength splitter,wherein said diffraction grating wavelength splitter further comprises:a first star coupler;a first arrayed waveguide comprised of multiple waveguides having different optical path lengths; anda second star coupler;which are sequentially positioned from said period characteristic wavelength splitter side, andsaid period characteristic wavelength splitter further comprising:a third star coupler that is connected to said first input/output port;a second arrayed waveguide comprised of multiple waveguides having different optical path lengths that is connected to said third star coupler; anda fourth star coupler of which one end is connected to said second arrayed waveguide and the other end is connected to said first star coupler, andwhen optical signal is input from said first input/output port to the period characteristic wavelength splitter, separate optical signals whose wavelengths are sequentially deviated with difference .delta. are output from the multiple ports at said first star coupler side of said fourth star coupler, and periodic optical signals whose wavelengths differ by .DELTA..lambda. are output from each of the multiple ports of said first star coupler side of said fourth star coupler.