US 11,870,552 B2
Apparatus and method for coherent optical multiplexing 1+1 protection
Peigang Hu, Fujian (CN); and Yajun Wang, Fujian (CN)
Assigned to II-VI DELAWARE, INC., Wilmington, DE (US)
Filed by II-VI Delaware, Inc., Wilmington, DE (US)
Filed on Mar. 21, 2023, as Appl. No. 18/187,510.
Application 18/187,510 is a continuation of application No. 17/664,714, filed on May 24, 2022, granted, now 11,637,646.
Application 17/664,714 is a continuation of application No. 17/335,231, filed on Jun. 1, 2021, granted, now 11,374,673, issued on Jun. 28, 2022.
Claims priority of application No. 202010477314.6 (CN), filed on May 29, 2020.
Prior Publication US 2023/0224060 A1, Jul. 13, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G02F 1/00 (2006.01); H04J 14/02 (2006.01); G02B 27/10 (2006.01); H04B 10/291 (2013.01); H04B 10/61 (2013.01)
CPC H04J 14/0202 (2013.01) [G02B 27/1006 (2013.01); H04B 10/291 (2013.01); H04B 10/614 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A node for coherent optical multiplexing 1+1 protection for optical signals of a plurality of multiplexers on a plurality of disjointed paths, the node comprising:
a first optical splitter having a plurality of input ports, each connected with one of the plurality of multiplexers, and a plurality of output ports, each connected with one of the plurality of disjointed paths via one of a plurality of transmission ports;
an optical switch having a single output interface and a plurality of input interfaces, each connected with others of the plurality of transmission ports; and
a second optical splitter having a single input port connected with the single output interface of the optical switch and a plurality of output ports, each connected with one of the plurality of multiplexers.