System and method for an optical phase shifter

摘要

In one embodiment, an optical phase shifter includes a first phase-shifter configured to phase shift a transverse electric (TE) component of an optical signal by a first phase-shift to produce a TE component of a first signal, and a transverse magnetic (TM) component of the optical signal by a second phase-shift to produce a TM component of the first signal. The optical phase-shifter includes a polarization-rotator configured to rotate the TE component of the first signal to produce a TM component of a rotated signal, and the TM component of the first signal to produce a TE component of the rotated signal. The optical phase-shifter includes a second phase-shifter configured to phase-shift a TE component of the rotated signal by a third phase-shift, and the TM component of the rotated signal by a fourth phase-shift, where the first phase-shifter, the polarization-rotator, and the second phase-shifter are integrated on a substrate.

主权项

1. An optical phase shifter comprising:
a first waveguide phase shifter configured to phase shift a transverse electric (TE) polarized component of an input optical signal by a first phase shift to produce a TE polarized component of a first phase shifted optical signal, and configured to phase shift a transverse magnetic (TM) polarized component of the input optical signal by a second phase shift to produce a TM polarized component of the first phase shifted optical signal; a first polarization rotator configured to rotate the TE polarized component of the first phase shifted optical signal to produce a TM polarized component of a rotated optical signal, and configured to rotate the TM polarized component of the first phase shifted optical signal to produce a TE polarized component of the rotated optical signal; and a second waveguide phase shifter configured to phase shift a TE polarized component of the rotated optical signal by a third phase shift to produce a TE polarized component of a second phase shifted optical signal, and configured to phase shift the TM polarized component of the rotated optical signal by a fourth phase shift to produce a TM polarized component of the second phase shifted optical signal, wherein the first waveguide phase shifter, the first polarization rotator, and the second waveguide phase shifter are integrated on a single substrate.