| 摘要 |
<p>An optical switch matrix (100) connects N input waveguides (118) to M output waveguides (120) via M rows (a-d) of switch sets. Each row of switch sets (112) includes a first switch set that has one input port (140) and two output ports. N-2 intermediate switch sets (114) that have two input ports and two output ports, and a last switch set that has two input ports and one or two output ports. One output port of each first or intermediate switch set is optically coupled to an input port of a succeeding switch set in the same row, and the other output port is optically coupled to an input port of a respective switch set in a cyclically succeeding row, by intermediate waveguides that do not cross each other. The only exceptions are the intermediate waveguides that connect the last row to the first row. These intermediate waveguides may cross other waveguides.</p> |
