All-solid-state laser driving power supply device achieving constant voltage / constant current automatic switching

Abstract

The invention discloses an all-solid-state laser driving power supply device achieving constant voltage / constant current automatic switching. The all-solid-state laser driving power supply device comprises a main circuit and a control drive circuit, wherein the main circuit is used for adjusting output drive currents according to control signals outputted from the control drive circuit and providing the output drive currents to a laser; the control drive circuit comprises a constant voltage circuit and a constant current circuit, the constant voltage circuit is used for enabling an all-solid-state laser driving power supply to be in a constant voltage mode at a power-on primary stage, and the constant current circuit is used for enabling the all-solid-state laser driving power supply to be in a constant current pattern at a normal operation stage. By the adoption of the drive power supply, the fact that a laser pumping diode cannot be damaged due to rapidly changing driving voltage in the whole operating process of the all-solid-state laser can be achieved.

Description

technical field [0001] The invention relates to the technical field of laser driving power supply, in particular to a constant voltage / constant current automatic switching all-solid-state laser driving power supply device for driving high-power all-solid-state lasers. Background technique [0002] The all-solid-state laser uses a semiconductor laser diode as its pumping module. The current injected into the diode determines the output power of the laser. Therefore, a driving power supply in constant current mode is generally used, and the output voltage is adaptive according to the load characteristics of the laser. At the same time, in order to meet the adjustability of the output power of the laser, the output current is required to be continuously adjustable. Like ordinary diodes, the volt-ampere characteristics of all solid-state laser pump modules are not linear, such as figure 1 As shown, in the case of a small current, the equivalent impedance of the all-solid-state ...

AI Technical Summary

Problems solved by technology

But this kind of soft start circuit is not suitable for the use of all solid-state laser drive power

Because the commonly used switching power supply needs to establish the output voltage at the beginning of power-on, and the output voltage of the driving power supply of the all-solid-state laser is increased from zero by external adjustment, that is, the power supply starts to have an output voltage that is not synchronized with the system power-on. Therefore, the use of such soft-start technology for all-solid-state lasers has no effect, and the initial output voltage will still increase rapidly.

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