US 12,244,118 B2
Pulsed laser diode driver
Joseph H. Colles, Bonsall, CA (US); Steven E. Rosenbaum, San Diego, CA (US); and Stuart B. Molin, Carlsbad, CA (US)
Assigned to Silanna Asia Pte Ltd, Singapore (SG)
Filed by Silanna Asia Pte Ltd, Singapore (SG)
Filed on Feb. 13, 2024, as Appl. No. 18/440,422.
Application 18/440,422 is a continuation of application No. 18/185,962, filed on Mar. 17, 2023, granted, now 11,929,588.
Application 18/185,962 is a continuation of application No. 17/648,907, filed on Jan. 25, 2022, granted, now 11,631,961, issued on Apr. 18, 2023.
Application 17/648,907 is a continuation of application No. 17/301,009, filed on Mar. 22, 2021, granted, now 11,245,247, issued on Feb. 8, 2022.
Claims priority of provisional application 63/127,794, filed on Dec. 18, 2020.
Claims priority of provisional application 62/994,470, filed on Mar. 25, 2020.
Prior Publication US 2025/0023324 A1, Jan. 16, 2025
Int. Cl. H01S 5/026 (2006.01); H01S 5/042 (2006.01); H01S 5/068 (2006.01); H01S 5/40 (2006.01)
CPC H01S 5/0261 (2013.01) [H01S 5/0428 (2013.01); H01S 5/06808 (2013.01); H01S 5/4025 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A pulsed laser diode driver comprising:
a laser diode switch having a first node that is configured to receive a source voltage;
a source capacitor having a first capacitor terminal directly electrically connected to the first node of the laser diode switch to provide the source voltage and a second capacitor terminal electrically coupled to a bias voltage node;
an inductor having a first terminal and a second terminal, the first terminal of the inductor being directly electrically connected to a second node of the laser diode switch;
a bypass switch having a drain node that is directly electrically connected to the second terminal of the inductor and a source node that is directly electrically connected to the bias voltage node;
a bypass capacitor having a first terminal that is directly electrically connected to the drain node of the bypass switch; and
a laser diode having an anode that is directly electrically connected to the second terminal of the inductor and a cathode that is directly electrically connected to the bias voltage node;
wherein:
the laser diode switch and the bypass switch are configured to control a current flow through the inductor to produce a high-current pulse through the laser diode, the high-current pulse corresponding to a peak current of a resonant waveform developed at the anode of the laser diode.