Driving module and driving method of laser radar and semiconductor laser

A technology for driving modules and lasers, which is applied to semiconductor lasers, lasers, laser components, etc., and can solve problems such as small peak power and pulse width modulation range, complex drive circuit structure, slow peak power and pulse width modulation speed, etc.

Pending Publication Date: 2020-06-05
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the existing lidar generally has the defects of complex drive circuit structure, slo

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  • Driving module and driving method of laser radar and semiconductor laser
  • Driving module and driving method of laser radar and semiconductor laser
  • Driving module and driving method of laser radar and semiconductor laser

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[0042] The following specific specific examples illustrate the implementation of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in conjunction with a preferred embodiment, this does not mean that the features of the present invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in combination with the embodiments is to cover other options or modifications that may be extended based on the claims of the invention. In order to provide an in-depth understanding of the present invention, the following description will contain many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or obscuring the focus of the present invention, some specific details will be ...

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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...

Claims

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Application Information

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IPC IPC(8): H01S5/042G01S7/481
CPCH01S5/0427H01S5/0428G01S7/4814
Inventor 邱剑刘克富陈志文颜颖颖
Owner FUDAN UNIV
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