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27 April 2020 Fast settling PWM laser diode driver (Conference Presentation)
Martin Berendt, Hugo Barbosa, Job Tomé, Miguel Melo
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Proceedings Volume 11410, Laser Radar Technology and Applications XXV; 114100D (2020) https://doi.org/10.1117/12.2558826
Event: SPIE Defense + Commercial Sensing, 2020, Online Only
Abstract
We show a fast settling digital laser controller with pulse width modulation (PWM) current drive output. By using self learning feed forward and delayed proportional integral and differential (PID) feedback control, the drive current settles faster than the digital control loop execution time. The feed forward model is updated based on parameters learned from stable feedback operation. Pulse modulation settling time and stable high efficient CW operation is made possible with this approach. The laser diode controller is well suited for pulse modulation or electrical gating of high power laser diodes due to its high efficiency and over dampened settling.
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Martin Berendt, Hugo Barbosa, Job Tomé, and Miguel Melo "Fast settling PWM laser diode driver (Conference Presentation)", Proc. SPIE 11410, Laser Radar Technology and Applications XXV, 114100D (27 April 2020); https://doi.org/10.1117/12.2558826
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KEYWORDS
Semiconductor lasers
Modulation
Continuous wave operation
Microcontrollers
Beam controllers
Clocks
Feedback control
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