Markers for dual-polarization optical systems

Abstract

An optical system includes a first modulator configured to: receive first input light, modulate an amplitude of the first input light with a first data signal, modulate a phase of the first input light with a first marker signal, and output to an optical element, as first modulated light, the first input light modulated with the first data signal and the first marker signal. The optical system includes a second modulator configured to: receive second input light, modulate an amplitude of the second input light with a second data signal, modulate a phase of the second input light with a second marker signal, and output to the optical element, as second modulated light, the second input light modulated with the second data signal and the second marker signal. The second marker signal includes a complementary version of the first marker signal.

Dependencies are inferred from the claim text.