| 摘要 |
PROBLEM TO BE SOLVED: To provide an improved optical coupler which enables more accurately matching the intensity distribution to output waveguides with respect to the optical coupler comprising at least one input waveguide, a coupling region, and a plurality of output waveguides. SOLUTION: The coupling region comprises a plurality of coupled waveguides, which diverge with respect to each other in the propagation direction of electromagnetic radiation launched in the input waveguide. In these couplers, both the amplitude distribution and a phase distribution can be accurately matched to the output waveguides resulting in relatively low loss and cross-talk. COPYRIGHT: (C)2003,JPO |
