US 12,294,197 B1
System and controller for stabilization of injection-locked laser diode amplifiers
Marco Cassinerio, San Jose, CA (US); and Eric Johnstone, Redwood City, CA (US)
Assigned to KEYSIGHT TECHNOLOGIES, INC., Santa Rosa, CA (US)
Filed by Keysight Technologies, Inc., Santa Rosa, CA (US)
Filed on Nov. 30, 2020, as Appl. No. 17/106,329.
Claims priority of provisional application 62/982,342, filed on Feb. 27, 2020.
Int. Cl. H01S 5/0687 (2006.01); G02F 1/21 (2006.01); H01S 3/10 (2006.01); H01S 3/13 (2006.01); H01S 5/00 (2006.01); H01S 5/024 (2006.01)
CPC H01S 5/0687 (2013.01) [G02F 1/21 (2013.01); H01S 3/10069 (2013.01); H01S 3/1305 (2013.01); H01S 5/0085 (2013.01); H01S 5/02415 (2013.01); G02F 1/213 (2021.01)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
a laser diode adapted to output an optical signal having a wavelength;
an interferometer adapted to receive a portion of the optical signal from the laser diode;
a controller comprising a processor and coupled to the laser diode and the interferometer, the controller comprising a memory that stores instructions, which when executed by the processor cause the processor to:
receive the optical signal from the interferometer;
determine a first amplitude peak of the optical signal received from the interferometer;
compare the first amplitude peak to a previous amplitude peak;
increase a driving current to the laser diode;
determine a second amplitude peak of the optical signal received from the interferometer;
compare the second amplitude peak to the first amplitude peak; and
based on the comparison of the second amplitude peak to the first amplitude peak, increase or decrease the driving current to the laser diode so the optical signal received from the interferometer is maintained in a desired wavelength.