公开(公告)号：US12047163B2

公开(公告)日：2024-07-23

申请号：US17527137

申请日：2021-11-15

Applicant: Infinera Corporation

Inventor： Christopher Fludger ,  Syed Muhammad Bilal ,  Demin Yao ,  Xiang Chen ,  Han Henry Sun ,  Byungyoon Min ,  William Isaac ,  Zihao Liu ,  Yuanqing Li

IPC: H04J14/02 ,  H04B10/50 ,  H04B10/54

CPC classification number: H04J14/0257 ,  H04B10/504 ,  H04B10/54 ,  H04J14/0272

Abstract: Techniques are described for implementing an out-of-band communication channel used to exchange control channel information in sub-carrier-based optical communication systems. In an example implementation, a transmitter includes a laser operable to supply an optical signal, a digital signal processor operable to supply first electrical signals based on first data input to the digital signal processor and second data input to the digital signal processor, digital-to-analog conversion circuitry operable to output second electrical signals based on the first electrical signals, modulator driver circuitry is operable to output third electrical signals based on the second electrical signals, and an optical modulator operable to supply first and second modulated optical signals based on the third electrical signals. The first modulated optical signal includes a plurality of optical subcarriers carrying user data. The plurality of optical subcarriers also being amplitude modulated to carry control information.