US 12,170,545 B2
Systems and methods for coherent optics in an access network
Luis Alberto Campos, Superior, CO (US); Zhensheng Jia, Superior, CO (US); and Matthew D. Schmitt, Pleasanton, CA (US)
Assigned to Cable Television Laboratories, Inc., Louisville, CO (US)
Filed by CABLE TELEVISION LABORATORIES, INC., Louisville, CO (US)
Filed on Oct. 3, 2022, as Appl. No. 17/937,572.
Application 17/937,572 is a continuation of application No. 16/370,873, filed on Mar. 29, 2019, granted, now 11,476,949.
Claims priority of provisional application 62/805,509, filed on Feb. 14, 2019.
Claims priority of provisional application 62/650,079, filed on Mar. 29, 2018.
Prior Publication US 2023/0040543 A1, Feb. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 10/516 (2013.01); H04B 10/27 (2013.01); H04B 10/40 (2013.01); H04B 10/61 (2013.01); H04B 10/63 (2013.01); H04J 14/02 (2006.01); H04J 14/06 (2006.01); H04L 12/28 (2006.01)
CPC H04B 10/63 (2013.01) [H04B 10/27 (2013.01); H04B 10/40 (2013.01); H04B 10/516 (2013.01); H04B 10/61 (2013.01); H04B 10/616 (2013.01); H04B 10/6164 (2013.01); H04J 14/02 (2013.01); H04J 14/06 (2013.01); H04L 12/2885 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An interface subsystem for a physical layer of a coherent optical access network, comprising:
a pre-interface portion (a) in operable communication with first and second separate input 100 GbE electrical signals from a host side of the coherent optical access network, and (b) including:
(i) a first optical transport network (OTN) framing unit configured to generate first and second frame structures for the first and second separate input 100 GbE electrical signals, respectively, and individually process the first and second input 100 GbE electrical signals with the first and second frame structures to output first and second 100G frame structures, respectively;
(ii) a first interleaver configured to aggregated the first and second 100G frame structures into a dual-100G frame structure and interleave the dual-100G frame structure into a single-output 200G frame structure; and
(iii) a forward error correction (FEC) encoder configured to integrate, in a continuous operation, open FEC (oFEC) onto each 100G frame structure portion of the single-output 200G frame structure;
an electrical interface portion (a) disposed within the physical layer of the coherent optical access network, (b) in operable communication with the pre-interface portion, and (c) including a digital-to-analog converter (DAC) configured to receive the single-output 200G frame structure; and
an optical interface portion (a) in operable communication with the electrical interface portion and a coherent optical transceiver proximate the interface subsystem opposite the optical interface portion, and (b) configured (i) to convert an output from the DAC into a 200G optical signal, and (ii) for optical transport of the 200G optical signal to and from the coherent optical access network by way of an optical transport medium coupled to the interface subsystem.