Large-current pulse LD laser driving power supply

Abstract

The invention provides a large-current pulse LD laser driving power supply, comprising a discharging unit; the discharging unit comprises a bias circuit used for calculating the voltage reduction of external loads, and the bias circuit comprises a first MOS tube, a first resister, a second resister, a first variable resister and a first capacitor; the drain of the first MOS tube is connected with the cathode terminal of external load; the source of the first MOS tube is grounded by the first resister; the grid of the first MOS tube is connected with the first variable resister by the second resister so as to obtain a constant voltage value; the grid of the first MOS tube is also grounded by the first capacitor so as to stabilize the voltage. The large-current pulse LD laser driving power supply realizes large-current power supply to the load, realizes the self-adaptability of the external load, realizes the constant current charging to the energy-storage capacitor, is beneficial to improving the charging efficiency and protecting the energy-storage capacitor and realizes the protection of the multi-path protection circuit on the LD load and the power supply.

Description

Technical field [0001] The invention relates to a driving power supply for lasers, in particular to a high-current pulsed LD laser driving power supply. Background technique [0002] At present, the driving current of LD (Laser Diode) lasers is usually continuous type and low current pulse type, and there are few driving power sources involving high current pulse type LD lasers. Moreover, the existing pulsed laser drive power supplies have the following problems: [0003] 1) Due to application limitations, the output pulse current amplitude and pulse width are relatively small, so it can only be used on low-power lasers. [0004] 2) Due to the unreasonable design of the driving pulse level generation circuit and the control driving circuit used in the driving power supply, the output current pulse usually has the problem that the pulse width changes with the current amplitude and the current pulse frequency. This is usually also Will cause the instability of the laser light outpu...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a high-current pulsed LD laser on the basis of overcoming the defects of low power, unstable output current pulse, and poor adaptable load capacity of the existing driving power supply for pulsed LD lasers. And a driving power supply with strong load adaptability

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