Constant-current drive circuit and method for laser power supply

Abstract

The invention relates to the technical field of laser drive power supplies, in particular to a constant-current drive circuit and method for a laser power supply. The constant-current drive circuit for the laser power supply comprises a main control circuit, a current protection circuit, a power output circuit, a current feedback adjustment circuit, a display circuit, a key circuit, a voltage power supply circuit and an AC-to-DC circuit, wherein the main control circuit is in two-way communication connection with the current protection circuit and the current feedback adjustment circuit separately; and a signal output end of the main control circuit is connected with a signal input end of the display circuit. According to the constant-current drive circuit and method, the damage to a device can be prevented, the output stability and the service life of a semiconductor laser are not affected by abnormal factors in any working environment, an electromagnetic compatibility problem and theconversion efficiency, and the constant-current drive circuit is relatively high in stability and relatively good in reliability.

Description

technical field [0001] The present invention relates to the technical field of laser drive power supply, in particular to a constant current drive circuit and method for laser power supply. Background technique [0002] With the advancement of science and technology, constant current sources are used more and more widely, especially in the field of laser drive power. The laser power supply controls the intensity and repetition frequency of the laser output of the laser. Due to its special internal structure and working mechanism, the laser has very high requirements on the working conditions and performance of its power supply, especially the stability of the output driving signal is very strict; because the slight change of the driving current is likely to It will cause changes in the main parameters of the laser, such as laser output wavelength and output optical power. If the parameters fluctuate too much, it will even cause damage to the laser. [0003] In the prior ar...

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Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a laser power supply constant current drive circuit and method for solving the problems in the prior art that may cause permanent damage to the device, and any abnormal factors in the working environment , electromagnetic compatibility issues, conversion efficiency, etc. will directly affect the stability and service life of the semiconductor laser output

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