US 12,113,577 B2
Method and system for encoding multi-level pulse amplitude modulated signals using integrated optoelectronic devices
Daniel Kucharski, Carlsbad, CA (US); Sherif Abdalla, Carlsbad, CA (US); and Brian Welch, San Diego, CA (US)
Assigned to Cisco Technology, Inc., San Jose, CA (US)
Filed by Cisco Technology, Inc., San Jose, CA (US)
Filed on Nov. 3, 2021, as Appl. No. 17/453,408.
Application 17/453,408 is a continuation of application No. 16/424,137, filed on May 28, 2019, granted, now 11,212,007.
Application 16/424,137 is a continuation of application No. 15/407,440, filed on Jan. 17, 2017, granted, now 10,305,597, issued on May 28, 2019.
Application 15/407,440 is a continuation of application No. 14/196,122, filed on Mar. 4, 2014, granted, now 9,548,811, issued on Jan. 17, 2017.
Application 14/196,122 is a continuation of application No. 13/568,616, filed on Aug. 7, 2012, granted, now 8,665,508, issued on Mar. 4, 2014.
Application 13/568,616 is a continuation of application No. 12/555,291, filed on Sep. 8, 2009, granted, now 8,238,014, issued on Aug. 7, 2012.
Claims priority of provisional application 61/191,480, filed on Sep. 8, 2008.
Prior Publication US 2022/0247495 A1, Aug. 4, 2022
Int. Cl. G02B 26/00 (2006.01); G02B 26/06 (2006.01); G02F 1/01 (2006.01); G02F 1/225 (2006.01); H04B 10/079 (2013.01); H04B 10/50 (2013.01); H04B 10/516 (2013.01); H04B 10/54 (2013.01); G02B 26/08 (2006.01); G02F 1/21 (2006.01)
CPC H04B 10/5161 (2013.01) [G02B 26/06 (2013.01); G02F 1/0121 (2013.01); G02F 1/225 (2013.01); G02F 1/2255 (2013.01); H04B 10/0795 (2013.01); H04B 10/505 (2013.01); H04B 10/5053 (2013.01); H04B 10/541 (2013.01); G02B 26/0841 (2013.01); G02F 1/212 (2021.01); G02F 2201/58 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A system for processing signals, the system comprising:
a plurality of flip-flops arranged to synchronize electrical input signals;
a plurality of drivers arranged to drive the synchronized electrical input signals from the plurality of flip-flops;
a first optical modulator comprising a first set of unit drivers arranged to drive a first plurality of diodes based on the synchronized electrical input signals from the plurality of drivers; and
a second optical modulator comprising a second set of unit drivers arranged to drive a second plurality of diodes based on the synchronized electrical input signals from the plurality of drivers, wherein the first set of unit drivers has more unit drivers than the second set of unit drivers, and wherein the first and second optical modulators are arranged to generate a multi-level, amplitude-modulated optical signal based on the synchronized electrical input signals from the plurality of drivers.