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:
Mar. 15, 2016
Filed:
Aug. 31, 2012
Jane Elizabeth Nordholt, Los Alamos, NM (US);
Charles Glen Peterson, Los Alamos, NM (US);
Raymond Thorson Newell, Santa Fe, NM (US);
Richard John Hughes, Los Alamos, NM (US);
Jane Elizabeth Nordholt, Los Alamos, NM (US);
Charles Glen Peterson, Los Alamos, NM (US);
Raymond Thorson Newell, Santa Fe, NM (US);
Richard John Hughes, Los Alamos, NM (US);
LOS ALAMOS NATIONAL SECURITY, LLC, Los Alamos, NM (US);
Abstract
Birefringence in optical fibers is compensated by applying polarization modulation at a receiver. Polarization modulation is applied so that a transmitted optical signal has states of polarization (SOPs) that are equally spaced on the Poincaré sphere. Fiber birefringence encountered in propagation between a transmitter and a receiver rotates the great circle on the Poincaré sphere that represents the polarization bases used for modulation. By adjusting received polarizations, polarization components of the received optical signal can be directed to corresponding detectors for decoding, regardless of the magnitude and orientation of the fiber birefringence. A transmitter can be configured to transmit in conjugate polarization bases whose SOPs can be represented as equidistant points on a great circle so that the received SOPs are mapped to equidistant points on a great circle and routed to corresponding detectors.