| 摘要 |
Optical multiplexer/demultiplexer (1) includes input slab waveguide (10) and output slab waveguide, which are formed, respectively, on the two ends of an array-waveguide diffraction grating with a number of waveguides. Input slab waveguide has input end (10a) provided with a reference input waveguide (3a) and a corrective input waveguide (3b), and the output slab waveguide has output end connected with a number of output waveguides. The corrective input waveguide is separated by a distance (G) from the input end of the input slab waveguide in the direction of the length of the slab waveguide, and it has an output end (3s) that makes an acute angle (theta 1) with a plane (W) perpendicular to the optical axis of the waveguide. Light is incident on a position a short distance (R-delta R) away from the incidence position (10y) to the reference input waveguide, where R is the spacing between the waveguides, and the deviation from the center wavelength of light is optimally corrected. |
