Patent ID: 11949458
Assignee: SEQUENT LOGIC, LLC
Field: Measurement (Instruments)
Classification: CPC G  H | IPC H

Claim 5:
6. The apparatus of claim 1, further including a dual polarization modulator configured to:
split incident local oscillator light into two fields;
modulate a phase, an amplitude, or both the phase and the amplitude of light in each of the two fields independently with a respective real or complex electrical signal; and
combine the two fields into a single optical output field in which one field is configured in a nominal polarization state and a superposed second field is configured in an orthogonal polarization state;
wherein electrical signals driving the two fields comprise a same substantially zero autocorrelation sequence, the same substantially zero autocorrelation sequence driving the nominal polarization state being delayed with respect to the same substantially zero autocorrelation sequence driving the orthogonal polarization state, wherein a vector after signal processing includes one region or regions of the optical system responsive to the nominal polarization state and a second region or regions of the system under test responsive to the orthogonal polarization state.