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How to Choose Semiconductor Laser Power Supply?

威廉希尔官方下载Mar 21, 2020

The selection of laser power supply should be based on the actual application of the laser. Take the semiconductor laser power supply as an example. Consider power, safety protection, manufacturer, etc.

The laser is widely recognized as advanced technology. The laser Doppler velocimeter can calculate the blood flow of the detected tissue by recording the frequency shift of the scattered light produced by the movement of blood cells under the laser irradiation. Laser Doppler imaging can be used for blood flow detection, human blood imaging in vivo, multi scattering photon path long distribution detection, etc. If we pay attention to it, it is not difficult to find that the progress of modern medicine is closely related to the development of laser technology. Specifically, it is closely related to the progress of semiconductor laser technology.

Principle of the semiconductor laser

The semiconductor laser is a device that produces the laser beam by using certain semiconductor materials as working materials. Its working principle is to realize the particle number inversion of the non-equilibrium carrier through certain excitation mode between the energy band (conduction band and valence band) of semiconductor material or between the energy band of semiconductor material and the energy level of impurity (acceptor or donor). When a large number of electrons in the particle number inversion state are combined with holes, stimulated emission will occur. There are three kinds of excitation modes for semiconductor lasers: electric injection, optical pump, and high energy electron beam.

Composition and requirements of semiconductor laser power supply

The semiconductor laser power supply circuit consists of a voltage stabilizing circuit, laser power pulse control circuit, pulse generation circuit, and protection circuit. The digital semiconductor laser power supply is based on the digital integrated circuit, which can realize the intelligent control.

In addition to stable voltage and current, the semiconductor laser power supply also has the functions of the current source drive and protection, optical power feedback control, constant temperature control, error alarm, and keyboard display.

The semiconductor laser driving power supply of KING's laser can be used for semiconductor laser and laser diode array and can provide pulse current up to 300A and direct current up to 64A. The driver can realize the smooth adjustment of optical parameters in a large range and is the smallest semiconductor laser power supply.

semiconductor laser drive power supply

(semiconductor laser drive power supply)

Semiconductor laser driving power supply is widely used in laser equipment (such as marking machine, welding machine, engraving machine, cutting machine), medical equipment, laser measurement equipment (such as spectrometer, laser positioner, laser rangefinder, etc.).


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