Driving module and driving method of laser radar and semiconductor laser

Abstract

The invention relates to a driving module and driving method of a laser radar and a semiconductor laser. The driving module comprises an energy storage capacitor, a charging inductor, a one-way conduction element and an adjusting switch tube. The energy storage capacitor is used for providing instantaneous large current for the semiconductor laser, and the semiconductor laser responds to the instantaneous large current to emit laser pulses. The charging inductor is electrically connected with the charging power supply and used for charging the energy storage capacitor. The unidirectional conduction element is arranged between the energy storage capacitor and the charging inductor and is electrically conducted towards the direction of the energy storage capacitor. The adjusting switch tubeis configured to adjust the charging current provided by the charging inductor for the energy storage capacitor by changing the conduction duration of the adjusting switch tube, thereby adjusting thevoltage value of the end of the energy storage capacitor so as to adjust the laser power of the laser pulse. According to the invention, the structure of a drive circuit can be simplified, and the modulation speed of the peak power and pulse width of the laser pulse is improved, thereby achieving the miniaturization of the laser radar and the quick modulation of the peak power and pulse width of the laser pulse.

Description

Technical field [0001] The invention relates to a semiconductor laser driving technology, in particular to a semiconductor laser driving module, a semiconductor laser driving method, a laser radar using the driving module to adjust the detection distance, and a driving method of the laser radar. Background technique [0002] In the field of lidar detection, the peak power and pulse width of laser pulses directly affect its detection range and detection accuracy. At present, the laser light source used in the laser radar detection field needs to provide a pulse width of 1-25ns and a peak power greater than 100W. [0003] For the same semiconductor laser, the peak power and pulse width of the laser pulse output by the laser mainly depend on its drive circuit. In addition, for different application scenarios and different detection distances, the laser radar detection system has different peak power and pulse width requirements for the laser light source, and requires rapid modulatio...

AI Technical Summary

Problems solved by technology

[0004] However, the existing lidar generally has the defects of complex drive circuit structure, slow peak power and pulse width modulation speed, and small peak power and pulse width modulation range.

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