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:
Jan. 23, 2007
Filed:
Sep. 26, 2001
Isaac Shpantzer, Bethesda, MD (US);
Michael Tseytlin, Bethesda, MD (US);
Yaakov Achiam, Rockville, MD (US);
Aviv Salamon, Washington, DC (US);
Israel Smilanski, Rockville, MD (US);
Olga Ritterbush, Rockville, MD (US);
Pak Shing Cho, Gaithersburg, MD (US);
LI Guoliang, North Potomac, MD (US);
Jacob Khurgin, Baltimore, MD (US);
Yehouda Meiman, Rishon Letzion, IL;
Alper Demir, Jersey City, NJ (US);
Peter Feldman, Short Hills, NJ (US);
Peter Kinget, Summit, NJ (US);
Nagendra Krishnapura, Hoboken, NJ (US);
Jaijeet Roychowdhury, Minneapolis, MN (US);
Joseph Schwarzwalder, Gaithersburg, MD (US);
Charles Sciabarra, Ellicott City, MD (US);
Isaac Shpantzer, Bethesda, MD (US);
Michael Tseytlin, Bethesda, MD (US);
Yaakov Achiam, Rockville, MD (US);
Aviv Salamon, Washington, DC (US);
Israel Smilanski, Rockville, MD (US);
Olga Ritterbush, Rockville, MD (US);
Pak Shing Cho, Gaithersburg, MD (US);
Li Guoliang, North Potomac, MD (US);
Jacob Khurgin, Baltimore, MD (US);
Yehouda Meiman, Rishon Letzion, IL;
Alper Demir, Jersey City, NJ (US);
Peter Feldman, Short Hills, NJ (US);
Peter Kinget, Summit, NJ (US);
Nagendra Krishnapura, Hoboken, NJ (US);
Jaijeet Roychowdhury, Minneapolis, MN (US);
Joseph Schwarzwalder, Gaithersburg, MD (US);
Charles Sciabarra, Ellicott City, MD (US);
CeLight, Inc., Silver Spring, MD (US);
Abstract
A system for optical communication forms a family of orthogonal optical codes modulated by a data stream. The orthogonal codes are formed by creating a stream of evenly spaced-apart pulses using a pulse spreader circuit and modulating the pulses in amplitude and/or phase to form a family of orthogonal optical code words, each representing a symbol. A spreader calibration circuit is used to ensure accurate timing and modulation. Each code word is further modulated by a predetermined number of data bits. The data modulation scheme splits a code word into H and V components, and further processes the components prior to modulation with data, followed by recombining with a polarization beam combiner. The data-modulated code word is then sent, along with others to receiver. The received signal is detected and demodulated with the help of a symbol synchronization unit which establishes the beginning and end of the code words. A polarization mode distortion compensator at the receiver cooperates with a state of polarization compensator at the transmitter to mitigate polarization distortion in the fiber.