Asymmetric compensation of polarization dependent loss in dual-polarization optical systems

摘要

Methods and systems for asymmetrically compensating degradation of an optical signal-to-noise ratio (OSNR) induced by polarization dependent loss (PDL) in dual-polarization optical system include using an OSNR compensator. The OSNR compensator may separate the dual-polarization components and determine which component has degraded OSNR. The degraded component may be OSNR compensated using a phase-sensitive amplifier and/or a regenerator with a phase-sensitive amplifier.

主权项

1. A method for compensating optical signal-to-noise ratio (OSNR) degradation in an optical network, comprising:
receiving an optical signal having dual-polarization comprising X- and Y-polarization components; rotating a polarization axis of the optical signal; separating the X- and Y-polarization components into an X-polarization optical signal transmission path and a Y-polarization optical signal transmission path; determining a degraded polarization component selected from the X-polarization component and the Y-polarization component based on degradation of an optical signal-to-noise ratio induced by polarization dependent loss; and restoring an optical signal-to-noise ratio of the degraded polarization component, including performing phase-sensitive amplification on the degraded polarization component.