The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 28, 2011
Filed:
Sep. 30, 2008
Keith Conroy, Perkasie, PA (US);
Omer Acikel, San Diego, CA (US);
Francesco Caggioni, Winchester, MA (US);
Keith Conroy, Perkasie, PA (US);
Omer Acikel, San Diego, CA (US);
Francesco Caggioni, Winchester, MA (US);
Applied Micro Circuits Corporation, San Diego, CA (US);
Abstract
A system and method are provided for calibrating temporal skew in a multichannel optical transport network (OTN) transmission device. The method accepts a pair of 2-phase shift keying (2-PSK) modulated signals, as well as a pair of 2-PSK modulated signals. The 2-PSK and 2-PSK signals are converted to 2-PSK and 2-PSK optical signals, respectively. The 2-PSK and 2-PSK optical signals are orthogonally polarized and transmitted. A timing voltage is generated that is responsive to the intensity of the orthogonally polarized signals. The timing voltage is correlated to a reference frame calibration pattern associated with a preamble/header portion of an OTN frame. Then, the timing voltages associated with the Ix, Qx, Iy, and Qy signal paths are compared, and the misalignment between the timing voltages and the reference frame calibration pattern is minimized in response to adjusting time delay modules in the Ix, Qx, Iy, and Qy signal paths.