Power driver circuit of laser and laser

Abstract

The invention discloses a power driver circuit of a laser and the laser. In a power driver circuit, a first power unit and a second power unit are connected in parallel to a working module outside the circuit, and a first current negative feedback control loop is formed by a first current detection unit, a first comparison unit, a first control unit and the first power unit; and the second current detection unit, the third comparison unit, the third control unit, the second comparison unit, the second control unit and the second power unit form a second current negative feedback control loop. Feedback regulation is carried out through the first current negative feedback control loop and the second current negative feedback control loop, and a first path of current flowing through the first power unit and a second path of current flowing through the second power unit are controlled, so that the first path of current and the second path of current are close to set current, and then the total current flowing through the working module is controlled. The power driver circuit has the advantages of low power consumption and long service life.

Description

technical field [0001] The invention belongs to the technical field of laser control, in particular to a laser power driver circuit and the laser. Background technique [0002] In industrial control systems, power drivers are roughly divided into two categories: one is a linear driver, and the other is a pulse width modulated switching driver. Compared with the pulse width modulation switching driver, the linear driver has the advantages of smooth driving, small ripple, no electromagnetic switching noise, no additional smoothing filter inductor, and high bandwidth. Therefore, the power driver of the laser pump source is usually a linear driver. [0003] The stability of the output power of the laser pump source directly determines the stability of the final laser output power of the laser. Since the output power of the laser pump source is proportional to the square of the current flowing through the laser pump source, it is required that the current flowing through the las...

AI Technical Summary

Problems solved by technology

As the output power of the laser increases day by day, it is necessary to provide a corresponding amount of current for the laser. However, as the current increases, the power consumption of the laser power drive device increases, and it is necessary to increase the capacity of the cooling system, and also It is necessary to increase the rated power of the semiconductor power drive device, which greatly increases the cost of the laser

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