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:
Feb. 17, 2015
Filed:
Nov. 07, 2008
Axel Klekamp, Markgröningen, DE;
Henning Bülow, Kornwestheim, DE;
Axel Klekamp, Markgröningen, DE;
Henning Bülow, Kornwestheim, DE;
Alcatel Lucent, Boulogne-Billancourt, FR;
Abstract
The invention relates to a method of generating a feedback signal for adjusting a polarization mode dispersion compensator (PMDC,) in a transmission system with alternate-polarization. A first signal () is determined by measuring a spectral component of the radio frequency modulation of an optical signal () at a particular radio frequency. Preferably, the radio frequency essentially corresponds to half the symbol rate of the optical signal (). Also a second signal () is determined by coupling the optical signal () into a delay line interferometer (DLI,) having a delay essentially corresponding to the symbol period or an odd multiple of the symbol period between its arms (). Downstream of the DLI (), the signal is optical-to-electrically converted. Downstream of the optical-to-electrical conversion, an intensity measurement is performed. The first () and second () signals are then combined to generate the feedback signal ().