An output current control device of a laser power supply

Abstract

The invention discloses an output current regulating device of a laser power supply, which is used to solve the problem that the mechanical potentiometer for regulating the driving current of the laser power supply in the prior art needs to manually set the circuit resistance, which is easy to generate errors in manual operation. Moreover, the resistance value of the mechanical potentiometer changes after long-term use, making it difficult to precisely control the driving current of the laser light source. Embodiments of the present invention include: a monostable pulse generating circuit, a drive circuit and a laser load circuit; the input end of the monostable pulse generating circuit is connected to a laser power supply for generating a monostable pulse signal; the monostable pulse generating circuit includes The active programmable resistance circuit is used to regulate the pulse width; the input end of the drive circuit is connected to the output end of the monostable pulse generating circuit, the output end of the drive circuit is connected to the input end of the laser load circuit, and the drive The circuit is used to regulate the on-off of the drive current output to the laser load circuit.

Description

technical field [0001] The invention relates to the technical field of laser light sources, in particular to an output current control device of a laser power supply. Background technique [0002] In the application of laser light source systems, it is often necessary to consider the physical characteristics of the laser light source. Since the laser light source is a solid light source, its PN junction is quite fragile, and a slight current shock will cause damage. Therefore, the laser power drive current requirements for semiconductor lasers (Laser Diode, LD) are very high, and must be low noise, high Stable constant current source. With a stable power drive, the laser pulse waveform can be stable, and to make the laser pulse work stably, an accurate pulse generation source is required. [0003] In the prior art, a mechanical potentiometer is usually used to control the driving current of the laser power supply, that is, the method of manually setting the circuit resista...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides an output current control device for a laser power supply, which solves the problem that in the prior art, the mechanical potentiometer that regulates the driving current of the laser power supply needs to manually set the circuit resistance, which is prone to errors in manual operation , and the mechanical potentiometer is prone to wear and tear during use, and the resistance value changes after long-term use, making it difficult to precisely control the driving current of the laser light source.

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