Optical circulator

Details Optical circulator Optical circulator

1998-02-18

1999-07-27

Spyrou, Cassandra

Optical: systems and elements

Polarization without modulation

Polarization using a time invariant electric, magnetic, or...

359495, 385 11, G02B 530

Patent

active

059300396

ABSTRACT:
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 reciprocal and non-reciprocal polarization rotators, birefringent beam splitters and combiners, and a birefringent walk-off element as well as 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.

REFERENCES:
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patent: 5471340 (1995-11-01), Cheng et al.
patent: 5574596 (1996-11-01), Cheng
patent: 5729377 (1998-03-01), Bergmann

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