US 12,290,312 B2
Measurement of pulsed laser output using optical detection of duty cycle
Gerald David Bacher, Carlsbad, CA (US); Derek Chen, Irvine, CA (US); Conrad Sawicz, Tustin, CA (US); and Dan Teodorescu, Irvine, CA (US)
Assigned to Alcon Inc., Fribourg (CH)
Filed by Alcon Inc., Fribourg (CH)
Filed on Oct. 29, 2020, as Appl. No. 17/083,707.
Claims priority of provisional application 62/930,263, filed on Nov. 4, 2019.
Prior Publication US 2021/0135424 A1, May 6, 2021
Int. Cl. H01S 3/13 (2006.01); A61B 18/20 (2006.01); H01S 3/0941 (2006.01)
CPC A61B 18/20 (2013.01) [H01S 3/0941 (2013.01); H01S 3/1305 (2013.01); H01S 3/1306 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A system for measuring pulsed laser output, the system comprising:
a laser configured to emit output in pulses;
at least one sensor positioned to sense output from the laser and configured to convert that output into electrical signals;
an edge detector configured to receive electrical signals from the at least one sensor and to detect from those electrical signals at least leading edges and trailing edges of a plurality of pulses from the laser;
an analog to digital converter configured to receive electrical signals from the at least one sensor and to convert those electrical signals into digital signals indicative of laser power output; and
a controller;
wherein, based on the detection by the edge detector of at least the detected leading edges of the plurality of pulses from the laser, the controller is configured to obtain from the analog to digital converter a plurality of samples of laser power output between a detected leading edge and a detected trailing edge of each of the plurality of pulses from the laser; and
wherein, based on the detection by the edge detector of the detected trailing edges, the controller is configured to sample laser power output between pulses from the laser at a reduced sample rate as compared to a sample rate of laser power output between the detected leading edges and the detected trailing edges.