Patent ID: 7133619
Filing Date: 2006-11-07
Classification: H04B,H04J

Abstract:
1. A polarization mode dispersion (PMD) compensation module comprising; a polarization beam splitter (PBS) separating an optical input into a first polarized signal and a second polarized signal, wherein the first polarized signal and the second polarized signal are substantially polarized orthogonally with respect to one another, a signal processing center; a first adjustable crystal, the first polarized signal traveling through the first adjustable crystal either fast or slow depending upon commands from the signal processing center, which receives a portion of the optical input; a second adjustable crystal, the second polarized signal traveling through the second adjustable crystal either fast or slow depending upon commands from the signal processing center; a compensating part, at least one of the first polarized signal and the second polarized signal traveling through the compensating part, and the light path of the at least one of the first polarized signal and the second polarized signal being continuously varied in length; and a combiner combining the first polarized signal and the second polarized signal, which respectively pass through the first and second adjustable crystals and the compensating part into an optical output.