Driving circuit, driving method and laser system

Abstract

The invention relates to a driving circuit, a driving method and a laser system. The driving circuit comprises a narrow pulse generator configured to generate a first narrow pulse based on an input pulse, the pulse width of the first narrow pulse being smaller than the pulse width of the input pulse; a voltage regulator configured to generate an adjustable output voltage; and a drive unit, which is coupled with the narrow pulse generator and the voltage regulator and is configured to form the second narrow pulse based on the first narrow pulse and the output voltage; wherein the second narrowpulse is suitable for driving the switching tube, the pulse width is approximately equal to the pulse width of the first narrow pulse, and the amplitude of the second narrow pulse depends on the magnitude of the output voltage of the voltage regulator. Thus, an output pulse whose pulse width and amplitude are independently adjustable can be formed. When the output pulse is used for driving the laser, the light emitting energy of the laser can be quickly adjusted in a large dynamic range.

Description

technical field [0001] The present disclosure generally relates to the technical field of circuits, and more specifically, relates to a driving circuit, a driving method and a laser system. Background technique [0002] In the application of laser light source systems, it is often necessary to consider the physical characteristics of laser light sources such as laser diodes (laser diodes, LDs). The drive current requirements for laser diodes are very high, and they must be low-noise, high-stability constant current sources. 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] The working principle of lidar is to transmit a detection signal (laser beam or light signal) to the target, and then compare the received signal (target echo) reflected from the target with the transmitted detection signal, and after proper processing, it can be Obtain information such as d...

AI Technical Summary

Problems solved by technology

However, for the method of changing the luminous energy by changing the HV, one problem is that the HV is generated by the booster circuit, and the HV needs to be changed by controlling the booster circuit, but the switching rate of the booster circuit is low, which will cause a delay between two adjustments. Allows for long settling times, i.e. no fast regulation

Another problem is that in a multi-channel lidar system, HV is generally shared by multiple channels. If HV is used to control the luminous energy of each channel independently, the system needs to have multiple independent boost circuits, which greatly increases the System complexity

Images