US 12,463,730 B1
Wavelength locking
Graeme Pendock, Carlisle, MA (US); Hongbin Zhang, Holmdel, NJ (US); Christopher Doerr, Middletown, NJ (US); and Tom Williams, Sudbury, MA (US)
Filed by ACACIA TECHNOLOGY, INC., San Jose, CA (US)
Filed on Sep. 7, 2022, as Appl. No. 17/939,857.
Application 17/939,857 is a continuation of application No. 16/456,582, filed on Jun. 28, 2019.
Claims priority of provisional application 62/825,953, filed on Mar. 29, 2019.
Claims priority of provisional application 62/788,389, filed on Jan. 4, 2019.
Claims priority of provisional application 62/783,702, filed on Dec. 21, 2018.
Int. Cl. H04B 10/58 (2013.01); H04B 10/07 (2013.01); H04B 10/40 (2013.01); H04B 10/50 (2013.01); H04B 10/572 (2013.01)
CPC H04B 10/58 (2013.01) [H04B 10/07 (2013.01); H04B 10/40 (2013.01); H04B 10/505 (2013.01); H04B 10/572 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method comprising:
digitally determining, at a first transceiver, a first frequency difference between a first laser of the first transceiver and a second laser of a second transceiver, wherein the first and second transceivers are optically connected; and
based on the first frequency difference being greater than an offset, changing the frequency of the first laser of the first transceiver and the second laser of the second transceiver using bidirectional tuning between the first transceiver and the second transceiver, to shift the frequency of the first laser toward the frequency of the second laser or to shift the frequency of the second laser toward the frequency of the first laser, wherein the bidirectional tuning comprises:
transmitting, by the first transceiver, the first frequency difference to the second transceiver;
receiving, by the second transceiver, the first frequency difference; and
changing, by the second transceiver, the frequency of the second laser based on the first frequency difference determined at the first transceiver.