Research of laser diode driver based on double-phase dual chopping conversion

In order to improve the power conversion efficiency, dynamic response of the output current and the load voltage adaptability of a traditional linear laser diode driver, a 2kW laser diode driver was designed based on double-phase dual chopping conversion. The static and dynamic characteristics of laser diode driver were tested and analyzed. The power efficiency of the double-phase dual chopping conversion current source was measured. The results show that the power system has good adaptability to the load and outputs rectangular waveforms. The power conversion efficiency of the current source is up to 93% when driving laser diode modules directly. Typical rise and fall time of output current in the range of 0A~100A is approximately 0.5ms. Current ripple factor is less than 0.03%.