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:
Jul. 01, 2014
Filed:
Oct. 05, 2010
Kuang-tsan Wu, Kanata, CA;
John D. Mcnicol, Ottawa, CA;
David F. Welch, Atherton, CA (US);
Stephen G. Grubb, Reisterstown, MD (US);
Pierre Mertz, Baltimore, MD (US);
Kuang-Tsan Wu, Kanata, CA;
John D. McNicol, Ottawa, CA;
David F. Welch, Atherton, CA (US);
Stephen G. Grubb, Reisterstown, MD (US);
Pierre Mertz, Baltimore, MD (US);
Infinera Corporation, Sunnyvale, CA (US);
Abstract
Consistent with the present disclosure, data, in digital form, is received by a transmit nodes of an optical communication, and converted to analog signal by a digital-to-analog converter (DAC) to drive a modulator. The modulator, in turn, modulates light at one of a plurality of wavelengths in accordance with the received data. The modulated light is then transmitted over an optical communication path to a receive node. At the receive node, the modulated optical signal, as well as other modulated optical signals are supplied to a photodetector circuit, which receives additional light at one of the optical signal wavelengths from a local oscillator laser. An analog-to-digital converter (ADC) is provided in the receive node to convert the electrical signals output from the photodetector into digital form. The output from the ADC is then filtered in the electrical domain, such that optical demultiplexing of individual channels is unnecessary.