Partial optical circulators

Details Partial optical circulators Partial optical circulators

1997-04-10

1999-02-16

Healy, Brian

Optical waveguides

With optical coupler

385 11, 385 16, 385 18, 385 24, 359483, 359494, 359497, G02B 626, G02B 530

Patent

active

058728783

ABSTRACT:
A partial optical coupler of the present invention comprises first, second and third walk-off devices having a non-reciprocal polarization interchanger unit positioned between the first and second and the second and third walk-off devices. The first and third walk-off devices are matched in terms of the amount of walk-off and the direction of walk-off. A further embodiment includes a reflector which allows the light beam to pass through each walk-off device and each non-reciprocal polarization interchanger unit twice.

REFERENCES:
patent: 4859014 (1989-08-01), Schmitt et al.
patent: 5204771 (1993-04-01), Koga
patent: 5428695 (1995-06-01), Ohta
patent: 5471340 (1995-11-01), Cheng et al.
patent: 5734763 (1998-03-01), Chang
patent: 5768005 (1998-06-01), Cheng et al.
High-Isolation Polarization-Insensitive Optical Circulator for Advanced Optical Communication Systems, Journal of Lightwave Technology, vol. 10, No. 9, Sep. 1992, pp. 1210-1216.

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