| 摘要 |
A method for ensuring path integrity in an optical switch is provided that essentially eliminates any occurrences of misconnected paths and enables new signal paths to be easily generated and existing paths to be switched. The method is suitable for use in optical switching devices that enable selective connection of optical signals received on a plurality of input fibers to respective output fibers, wherein the optical switching device includes a first array of mirrors disposed in a first mirror plane and a second array of mirrors disposed in a second mirror plane. In accord with the method, all mirrors are maintained in signal paths so that undesired light is prevented from reaching any of the output fibers. The mirror in the second mirror plane that is to be part of a new signal path is moved into its correct position for the new path, while the positions of the other mirrors are controlled such that no light is directed toward the second plane mirror or output fiber corresponding to the new signal path. A light is received on the input fiber and directed toward the mirror in the first mirror plane that is to be part of the signal path while the mirror is moved to direct light toward the second plane mirror, in a timed, controlled, motion. Proper configuration is then confirmed by observing a change in the output signal produced at the output fiber. The positions of each of the mirrors are then adjusted to optimize the signal path. |
