U.s.a. Kaifa Technology, Inc.

Xing Long Wang

Vincent Au-Yeung

Qing-Dong Guo

An improved optical circulator transfers light from a first optical port to a second optical port, and from the second port to a third port. The circulator has non-reciprocal polarization rotators, birefringent beam splitters and combiners, and a polarization-dependent light bending device comprising two tapered birefringent plates. The light bending device compensates for an angle between a first light beam emanating from the first port and a second light beam propagating to the third port. The existence of this angle allows the first and third fibers to be coupled to the light beams using a single lens.

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Sunnyvale, CA, United States of America

Xing Long Wang