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:
Dec. 26, 2023
Filed:
Dec. 30, 2019
Infinera Corporation, Sunnyvale, CA (US);
Kuang-Tsan Wu, San Jose, CA (US);
Han Henry Sun, Ottawa, CA;
Steven Joseph Hand, San Jose, CA (US);
David F. Welch, San Jose, CA (US);
Infinera Corporation, San Jose, CA (US);
Abstract
Methods, systems, and apparatus for subcarrier modulation with radio frequency inphase-quadrature (IQ) modulators. A system includes a plurality of IQ modulators, each configured to receive an input electrical signal comprising an inphase signal and a quadrature signal, and each configured to modulate the inphase signal and quadrature signal based on one of a plurality of local oscillator signals to output a multiplexed signal. Each of the plurality of local oscillator signals is supplied by a respective one of a plurality of local oscillator circuits. A modulator circuit is configured to modulate a carrier optical signal from a laser having a frequency ωbased on the multiplexed signal to generate a modulated optical signal centered at frequency ωand comprising a plurality of subcarriers. A center frequency of each of the plurality of subcarriers is offset from ωby a frequency of said one of the plurality of local oscillator signals.