Patent ID: 7970285
Filing Date: 2011-06-28
Classification: H04B

Abstract:
1. A method for calibrating temporal skew in a multichannel optical transport network (OTN) transmission device, the method comprising: accepting a pair of 2 accepting a pair of 2 converting the 2 multiplexing orthogonally polarized 2 transmitting the orthogonally polarized signals; generating a timing voltage responsive to detecting the intensity of the orthogonally polarized signals; correlating the timing voltage to a reference frame calibration pattern associated with a preamble/header portion of an OTN frame; comparing timing voltages associated with the Ix, Qx, Iy, and Qy signal paths; and, minimizing misalignment between the timing voltages and the reference frame calibration pattern in response to adjusting time delay modules in the Ix, Qx, Iy, and Qy signal paths.