US 12,438,338 B2
Auto flux timing for current resonant 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 Oct. 3, 2022, as Appl. No. 17/937,625.
Prior Publication US 2024/0113502 A1, Apr. 4, 2024
Int. Cl. H01S 5/042 (2006.01); H01S 5/026 (2006.01); H01S 5/062 (2006.01); H01S 5/068 (2006.01); H01S 5/40 (2006.01)
CPC H01S 5/0428 (2013.01) [H01S 5/0261 (2013.01); H01S 5/06216 (2013.01); H01S 5/06808 (2013.01); H01S 5/06825 (2013.01); H01S 5/4025 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A pulsed laser diode driver comprising:
a source capacitor having i) a first terminal configured to receive a refresh current and to develop a source voltage therefrom, and ii) a second terminal electrically coupled to ground;
an inductor having a first terminal that is directly electrically connected to the first terminal of the source capacitor;
a laser diode having an anode and a cathode, the anode being directly electrically connected to a second terminal of the inductor;
a bypass capacitor having a first terminal directly electrically connected to the second terminal of the inductor;
one or more switches configured to control a current flow through the inductor; and
a timing and control circuit configured to receive the source voltage and to generate one or more gate driver signals to control the one or more switches 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, a timing of the one or more gate driver signals being based on a voltage level of the source voltage.