公开(公告)号：US10965378B2

公开(公告)日：2021-03-30

申请号：US16578078

申请日：2019-09-20

Applicant: Infinera Corporation

Inventor： Amir Jafari ,  Steven J. Hand ,  Mohamed Osman

IPC: H04B10/00 ,  H04B10/61 ,  H04B10/40 ,  H04J14/02 ,  H04B10/54 ,  H04B10/548 ,  H04B10/50 ,  G02B6/293 ,  H04B10/532 ,  H01S3/067

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, an apparatus includes an optical tap coupled to an optical communication path carrying a modulated optical signal carrying a plurality of optical subcarriers. The optical tap has a first output configured to supply a first portion of the modulated optical signal and a second output configured to supply a second portion of the modulated optical signal. The plurality of optical subcarriers are amplitude modulated based on control data at a first frequency, and each of the plurality of optical subcarriers is modulated to carry user data at a second frequency greater than the first frequency. The apparatus is configured to supply the control based on the first portion of the modulated optical signal.

公开(公告)号：US20210076112A1

公开(公告)日：2021-03-11

申请号：US16732117

申请日：2019-12-31

Applicant: Infinera Corporation

Inventor： Steven J. Hand

IPC: H04Q11/00

Abstract: An example system includes a first network node, a second network node, and a third network node. The first network node is configured to generate a first optical subcarrier representing first data, and transmit the first optical subcarrier to the second network node. The second network node is configured to receive the first optical subcarrier from the first network node, generate a second optical subcarrier representing the first data, where the second optical subcarrier is different from the first optical subcarrier, and transmit the second optical subcarrier to the third network node.

公开(公告)号：US20210076110A1

公开(公告)日：2021-03-11

申请号：US16732041

申请日：2019-12-31

Applicant: Infinera Corporation

Inventor： Steven J. Hand

IPC: H04Q11/00

Abstract: An example system includes a plurality of network nodes, each including one or more respective first transceivers configured to transmit data according to a first maximum throughput, and one or more respective second transceivers configured to transmit data according to a second maximum throughput that is less than the first maximum throughput. A first network node is configured to transmit, using a respective one of the first transceivers, first data including a plurality of optical subcarriers to two or more second network nodes according to the first maximum throughput, each optical subcarrier being associated with a different one of the two more other network nodes. The two or more second network nodes are configured to receive, using respective ones of the second transceivers, the first data from the first network node.

公开(公告)号：US20200252154A1

公开(公告)日：2020-08-06

申请号：US16730562

申请日：2019-12-30

Applicant: Infinera Corporation

Inventor： Kuang-Tsan Wu ,  Han Sun ,  Steven J. Hand ,  David F. Welch

IPC: H04J14/02 ,  H04B10/25

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 ωc based on the multiplexed signal to generate a modulated optical signal centered at frequency ωc and comprising a plurality of subcarriers. A center frequency of each of the plurality of subcarriers is offset from ωc by a frequency of said one of the plurality of local oscillator signals.