US 12,218,708 B2
Apparatuses and methods for digital subcarrier parameter modifications for optical communication networks
Steven Joseph Hand, Los Gatos, CA (US); Ahmed Awadala, Gatineau (CA); Luis A. Perez, McKinney, TX (US); Vincent G. Dominic, Dayton, OH (US); and Kuang-Tsan Wu, Kanata (CA)
Assigned to Infinera Corporation, San Jose, CA (US)
Filed by Infinera Corporation, San Jose, CA (US)
Filed on Jun. 21, 2022, as Appl. No. 17/845,934.
Application 17/845,934 is a division of application No. 16/384,842, filed on Apr. 15, 2019, granted, now 11,368,228.
Claims priority of provisional application 62/668,297, filed on May 8, 2018.
Claims priority of provisional application 62/657,066, filed on Apr. 13, 2018.
Prior Publication US 2022/0352989 A1, Nov. 3, 2022
Int. Cl. H04B 10/564 (2013.01); H04B 10/516 (2013.01); H04B 10/61 (2013.01); H04L 1/00 (2006.01)
CPC H04B 10/564 (2013.01) [H04B 10/516 (2013.01); H04B 10/616 (2013.01); H04L 1/0041 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A digital signal processor, comprising:
forward error correction circuitry that provides encoded first electrical signals based on input data;
power adjusting circuitry that receives second electrical signals indicative of the first electrical signals, the power adjusting circuitry supplying third electrical signals, wherein each of the third electrical signals corresponds to an optical power level of a corresponding to one of a plurality of optical subcarriers output from an optical transmitter, wherein each of the third electrical signals has an associated one of a plurality of bandwidths, each of which corresponding to a spectral width of a respective one of the plurality of optical subcarriers;
a plurality of pulse shape filters corresponding to each of the third electrical signals, the plurality of pulse shape filters configured to shape the associated one of the plurality of bandwidths of the third electrical signals, each of which corresponding to a spectral width of a respective one of the plurality of optical subcarriers;
wherein each of the plurality of pulse shape filters is adjustable based on one or more control signal such that the shape of the plurality of bandwidths of the third electrical signals is adjustable.