In recent years, high precision semiconductor laser with continuous adjustable high stability is more and more widely used in military and civilian fields. And the demand of driving power supply used with laser is also becoming more and more. The semiconductor laser driving power supply with excellent quality and high stability and high precision should ensure the laser work safely, anti-interference ability is strong and the laser has the normal service life.
The work current of semiconductor laser with high power can reach more than dozens of ampere, and the node voltage is more than 1V. So the driving power supply of this laser should be a constant current power supply with high current stability. And the power supply must have protection circuit, anti-electric shock measures and no high voltage. The transient current, voltage spikes and many other factors are easy to damage the laser, and the current and temperature fluctuations will cause changes of light power, which can influence the output accuracy and stabilization. From here we see that semiconductor lasers have very high demand on driving power.
Next I will introduce the laser driver of our company, which can drive diode lasers with high current and high stability. AAS30A5V is an electronic power supply designed for laser diode with 0~30A. The output current of 0-30A can be set by setting the 0-2.5V analog voltage. There are over temperature and short circuit protection device in power supply. The modulation frequency can be as high as 5 KHz, resulting to an approximately 56μS rise/fall time at the output current.
