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:
Sep. 25, 2018
Filed:
Dec. 16, 2016
Infinera Corporation, Sunnyvale, CA (US);
Rene Marcel Schmogrow, San Jose, CA (US);
Infinera Corporation, Sunnyvale, CA (US);
Abstract
A method and an apparatus for non-blocking Mach-Zehnder Modulator (MZM) arm imbalance monitoring and control through tones are disclosed herein. An optical transmitter may include an MZM to supply a first portion of light to an in-phase arm and a second portion to a quadrature arm of the MZM. The optical transmitter may apply modulator arm adjustments and dither signals to the two portions. Then, the MZM may combine the two portions into an optical output signal. The optical transmitter may tap the optical output signal to provide a first portion of the optical output signal and transmit a second portion. Also, the optical transmitter may obtain first error signals, based on the first dither signal, and second error signals, based on the second dither signal, of the first portion of the output signal. The optical transmitter may change the modulator arm adjustments based on the error signals.