US 11,990,729 B2
Shaping pulses using a multi-section optical load
Hao Huang, San Jose, CA (US); Mikhail Dolganov, Gilroy, CA (US); and Lijun Zhu, Dublin, CA (US)
Assigned to Lumentum Operations LLC, San Jose, CA (US)
Filed by Lumentum Operations LLC, San Jose, CA (US)
Filed on Jun. 30, 2020, as Appl. No. 16/916,976.
Claims priority of provisional application 62/993,234, filed on Mar. 23, 2020.
Claims priority of provisional application 62/993,419, filed on Mar. 23, 2020.
Prior Publication US 2021/0296857 A1, Sep. 23, 2021
Int. Cl. H01S 5/042 (2006.01); H01S 5/026 (2006.01); H01S 5/0625 (2006.01); H01S 5/183 (2006.01); H01S 5/42 (2006.01)
CPC H01S 5/06253 (2013.01) [H01S 5/0261 (2013.01); H01S 5/0428 (2013.01); H01S 5/183 (2013.01); H01S 5/423 (2013.01)] 25 Claims
OG exemplary drawing
 
1. An electrical drive circuit for driving a multi-section optical load, the electrical drive circuit comprising:
a charging circuit path for charging, during a charging time between a first time and a second time, one or more inductive elements;
a discharging circuit path for generating, during a first time interval after the charging time, a compensation electrical pulse by discharging the one or more inductive elements; and
a main circuit path for generating, during a second time interval beginning at a third time different from the second time, a main electrical pulse,
wherein at least a portion of the first time interval overlaps with the second time interval;
wherein the electrical drive circuit is configured to:
provide the compensation electrical pulse to a compensation section of the multi-section optical load to cause the compensation section to emit a compensation optical pulse,
wherein the second time and the third time are controlled or adjusted such that an optical power of the compensation section increases to a peak power at the third time; and
provide the main electrical pulse to a main section of the multi-section optical load to cause the main section to emit a main optical pulse,
wherein the compensation electrical pulse and the main electrical pulse are both formed and provided to the multi-section optical load via independent circuit paths, and
wherein a combined optical pulse includes the compensation optical pulse and the main optical pulse such that:
a rise time of the compensation optical pulse defines a rise time of the combined optical pulse that is less than a rise time of the main optical pulse, and
a fall time of the main optical pulse defines a fall time of the combined optical pulse.