| 摘要 |
PROBLEM TO BE SOLVED: To cancel polarization dependence of a transmission center wavelength due to the waveguide birefringence in an arrayed waveguide and a slab waveguide in an arrayed waveguide diffraction grating type optical multiplexor/demultiplexor applied for optical communication, particularly, wavelength split multiplexing system. SOLUTION: In order to achieve the object of this invention, a polarization mode convertor converts the TE mode in a waveguide to the TM mode, and the TM mode to the TE mode. This conversion function makes it possible to cancel the polarization dependence of the transmission center wavelength due to the waveguide birefringence in the arrayed waveguide and the slab waveguide in front of and behind a polarization mode convertor. COPYRIGHT: (C)2007,JPO&INPIT |
