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:
Aug. 07, 2012
Filed:
Dec. 29, 2008
Charles H. Joyner, Sunnyvale, CA (US);
Radhakrishnan L. Nagarajan, Cupertino, CA (US);
Masaki Kato, Palo Alto, CA (US);
Peter W. Evans, Mountain House, CA (US);
Fred A. Kish, Jr., Palo Alto, CA (US);
Charles H. Joyner, Sunnyvale, CA (US);
Radhakrishnan L. Nagarajan, Cupertino, CA (US);
Masaki Kato, Palo Alto, CA (US);
Peter W. Evans, Mountain House, CA (US);
Fred A. Kish, Jr., Palo Alto, CA (US);
Infinera Corporation, Sunnyvale, CA (US);
Abstract
A high capacity optical transmitter implemented on a photonic integrated circuit chip comprises a single light source which supplies a continuous wave having a particular wavelength to a plurality of modulators to form modulated optical information signals. A phase shifter is coupled to at least one of the modulators and is used to shift the phase of the corresponding modulated optical information signal associated with a particular modulator. A polarization beam combiner receives each of the modulated optical information signals from the modulators and the modulated optical information signal from the phase shifter and combines each of these signals to form a polarization multiplexed differential quadrature phase-shift keying signal. The light source, the plurality of modulators, the phase shifter and the polarization beam combiner are all integrated on the chip.