Four-port PM circulator
AssigneeOplink Communications, Inc.
InventorYanbin Shao
Life of this patent
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Abstract
A system and method for a four-port circulator. The four-port circulator includes a polarization beam splitter, a first reflector, a first non-reciprocal device, a second non-reciprocal device, and a second reflector. The first reflector is coupled with the polarization beam splitter. The first non-reciprocal device is coupled to the first reflector. The second non-reciprocal device is coupled to the polarization beam splitter. The second reflector is coupled with the polarization beam splitter.
Claims17
A four-port circulator comprising:
- a polarization beam splitter;
- a first reflector coupled with the polarization beam splitter;
- a first non-reciprocal device coupled to the first reflector;
- a second non-reciprocal device coupled to the polarization beam splitter;
- and
- a second reflector coupled with the polarization beam splitter.
A method for transmitting light among a first port, a second port, a third port, and a fourth port, the light having either a first polarization or a second polarization, the method comprising:
- forwarding a first light signal received from the first port with the first polarization to a polarization beam splitter;
- directing the first light signal to a first reflector;
- reflecting the first light signal to a first non-reciprocal device;
- changing the polarization of the first light signal from the first polarization to a second polarization;
- and
- directing the first light signal into the second port.
Dependencies are inferred from the claim text.