Method and apparatus for controlling an optical signal

Details Method and apparatus for controlling an optical signal Method and apparatus for controlling an optical signal

1997-06-20

1999-10-19

Healy, Brian

Optical waveguides

With optical coupler

Particular coupling function

385 1, 385 2, 385 3, 385 11, 385 9, 385 15, 385 16, 385 41, 385 42, 356345, G02B 626, G01B 902

Patent

active

059701889

ABSTRACT:
The invention is a method and apparatus that provides for the control of optical signals in a polarization-independent manner using birefringence. The invention includes an optical coupler connected to a birefringence element by an optical path loop. The optical coupler and optical path loop could be a Sagnac interferometer. The birefringence element affects the phase velocity of optical signals based on a control signal, and it can introduce a relative phase shift between optical signals propagating around the loop. The optical signals can be routed based on this phase shift.

REFERENCES:
patent: 5031236 (1991-07-01), Hodgkinson et al.
patent: 5136667 (1992-08-01), Ohno et al.
patent: 5757529 (1998-05-01), Desurvire et al.
patent: 5760948 (1998-06-01), Bigo
patent: 5857040 (1999-01-01), Bigo et al.

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