US 11,689,312 B2
System and methods for coherent optical extension
Zhensheng Jia, Superior, CO (US); Curtis Dean Knittle, Superior, CO (US); and Luis Alberto Campos, Superior, CO (US)
Assigned to Cable Television Laboratories, Inc., Louisville, CO (US)
Filed by CABLE TELEVISION LABORATORIES, INC., Louisville, CO (US)
Filed on Dec. 27, 2021, as Appl. No. 17/562,595.
Application 17/562,595 is a continuation of application No. 16/730,089, filed on Dec. 30, 2019, granted, now 11,212,028.
Application 16/730,089 is a continuation of application No. 15/609,461, filed on May 31, 2017, granted, now 10,523,356, issued on Dec. 31, 2019.
Claims priority of provisional application 62/343,219, filed on May 31, 2016.
Prior Publication US 2022/0158751 A1, May 19, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 10/29 (2013.01); H04J 14/02 (2006.01); H04B 10/61 (2013.01)
CPC H04J 14/0282 (2013.01) [H04B 10/29 (2013.01); H04B 10/61 (2013.01); H04J 14/0204 (2013.01); H04J 14/0209 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A passive optical network (PON) extender apparatus, comprising:
an extender transceiver for communication with an associated optical communication hub, the extender transceiver including (i) at least one coherent receiving portion configured to receive a single coherent optical wavelength from the optical communication hub, (ii) at least one coherent transmitting portion, and (iii) an extender processor;
a signal adaptation unit separate from the extender transceiver and configured to (i) receive an input plurality of downstream electrical transmission signals from the coherent receiving portion, and (ii) output a plurality of individual downstream optical channels;
a plurality of adaptation transceivers disposed within the signal adaptation unit, each adaptation transceiver of the plurality of adaptation transceivers configured to convert one of the input plurality of downstream electrical transmission signals into one or more of the plurality of individual downstream optical channels; and
a multiplexer configured to bundle the plurality of individual downstream optical channels for transmission to respective ones of a plurality of one or more of a remote optical node, a downstream termination unit, and an end-user,
wherein each downstream optical channel of the plurality of individual downstream optical channels is based on at least one respective input electrical transmission signal of the input plurality of downstream electrical transmission signals.