| 摘要 |
Cross talk reduction is essential in all-optical switches. This invention utilizes a series of polarization rotating devices to remove cross-talking leakage lights away from the main optical path. The designs of both 1x2 and 2x2 polarization-independent optical switches having significantly reduced cross talk are disclosed. Also, a method to construct bi-directional magneto-optical (MO) switches is introduced. The cross talk reduction scheme for the bi-directional MO switches can be further simplified. Furthermore, the current invention discloses a novel sensing mechanism where a magnetic field sensor is positioned nearby the magneto-optic crystal so that its magnetization state can be easily detected. The state of the optical switch can, therefore, be sensed at any given time.
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