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US 8,942,516 B2Granted
Multi-port optical circulator system
AssigneeSkorpios Technologies, Inc.
InventorsLina He, Amit Mizrahi
Life of this patent
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Abstract
An optical circulator includes a first optical isolator including a first port and a second port and a plurality of optical isolators coupled to the second port of the first optical isolator. Each of the plurality of optical isolators comprise a first port and a second port.
Claims22
An optical isolator comprising:
- an input port;
- an optical splitter coupled to the input port;
- a first interferometer arm having a first predetermined phase shift for a first direction of propagation;
- a second interferometer arm having a second predetermined phase shift for the first direction of propagation;
- an optical coupler joining the first interferometer arm and the second interferometer arm;
- a first output port coupled to the optical coupler;
- and
- a second output port coupled to the optical coupler, wherein:
- light propagating from the input port through the first interferometer arm to the first output port is in-phase with light propagating from the input port through the second interferometer arm to the first output port;
- and
- light propagating from the input port through the first interferometer arm to the second output port is out-of-phase with light propagating from the input port through the second interferometer arm to the second output port.
8 more elements
An optical circulator comprising:
- a set of three optical isolators, each including an input/output port, an output port, a secondary input port, a first interferometer arm and a second interferometer arm, wherein light entering the secondary input port exits through the input/output port;
- a first optical coupler joining the output port of the first optical isolator to the secondary input port of the second optical isolator;
- a second optical coupler joining the output port of the second optical isolator to the secondary input port of the third optical isolator;
- and
- a third optical coupler joining the output port of the third optical isolator to the secondary input port of the first optical isolator.
2 more elements
An optical circulator comprising:
- a first input/output (I/O) port;
- a third input/output (I/O) port;
- a first waveguide including non-reciprocal material and coupled to the first I/O port;
- a second waveguide including non-reciprocal material and a reciprocal phase shift region and coupled to the third I/O port;
- a first optical coupler coupled to the first I/O port, the third I/O port, the first waveguide, and the second waveguide, wherein the first optical coupler is operable to introduce a π/2 phase shift for light propagating from the first I/O port to the second waveguide;
- a fourth input/output (I/O) port;
- a second input/output (I/O) port;
- and
- a second optical coupler coupled to the fourth I/O port, the second I/O port, the first waveguide, and the second waveguide, wherein:
- the second optical coupler is operable to introduce a π/2 phase shift for light propagating from the first waveguide to the second I/O port, and
- the second optical coupler introduces no substantial phase shift for light propagating from the first waveguide to the fourth I/O port and the second optical coupler introduces no substantial phase shift for light propagating from the second waveguide to the second I/O port.
8 more elements
Dependencies are inferred from the claim text.