Double pass polarization independent mixer and method using single nonlinear mixer media and off-axis focusing
AssigneeAgilent Technologies, Inc.
InventorGregory S. Lee
Life of this patent
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Abstract
An apparatus includes a mixer, a combiner and first and second reflectors. The mixer has first and second inputs and has first and second outputs. The combiner includes first and second parts where the first output provides a mixed signal to the first part and the second part provides a combined signal to the second input. The first reflector receives a remaining signal from the first part and provides a reflected composite signal to the second part. The second reflector receives a split off pump signal from the first part and provides a reflected pump signal to the second part.
Claims20
An apparatus comprising:
- a mixer having first and second inputs and having first and second outputs;
- a combiner that includes first and second parts, the first output providing a mixed signal to the first part, the second part providing a combined signal to the second input;
- a first reflector to receive a remaining signal from the first part and provide a reflected composite signal to the second part;
- and
- a second reflector to receive a split off pump signal from the first part and provide a reflected pump signal to the second part.
A method comprising:
- mixing into a once mixed signal a pump signal of a predetermined polarity with a signal under test of an arbitrary polarity;
- separating the once mixed signal into a separated pump signal and a remaining signal, one of the separated pump signal and the remaining signal being defined as a first signal, another of the separated pump signal and the remaining signal being defined as a second signal;
- twist reflecting the first signal;
- retro-reflecting the second signal;
- and
- mixing into a twice mixed signal the twist reflected first signal and the retro-reflected second signal.
Dependencies are inferred from the claim text.