| 摘要 |
A multi-port optical circulator for transmitting light from incoming and outgoin g ports circularly includes one or more birefringent crystal plates disposed adjacent to one another for dividing an input beam into two beams having orthogonal polarization s and for combining two beams having orthogonal polarizations into a singe beam. Polar ization beam splitting cubes introduce a beam to an opposite direction depending on the direction of the polarization of the beam and thereby substantially reflecting only one of s and p-polarizations of the beam. A polarization rotator between the first dividing a nd combining birefringent crystal and said polarization dependent beam splitting cube makes t wo orthogonal polarization vectors parallel or the two parallel polarization vector s orthogonal to one another.
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