Narrow pulse width pulsed laser

Abstract

This application relates to a pulsed laser with narrow pulse width. The pulsed laser includes a circuit substrate, a laser chip, a capacitor and a field effect tube. The field effect tube, capacitor and laser chip are all electrically connected to the circuit substrate. The capacitor is connected between the field effect tube and the laser The chips are arranged along the extending direction of the gap between the field effect transistor and the laser chip. According to the technical solution of the embodiment of the present application, the layout of the structural components in the pulse laser is optimized, and the distance between the field effect tube and the laser chip is reduced, so that the layout of the structural components is more compact, which is beneficial to reduce the pulse laser. The loop inductance makes the pulse laser discharge faster, and the output pulse width of the pulse laser is compressed when the pulse laser is working, that is, a pulse laser with a narrow pulse width is realized. Furthermore, when it is applied to lidar, it can achieve greater point cloud density, higher ranging accuracy, better repeatability and greater limit ranging distance.

Description

technical field [0001] The present application relates to the technical field of pulsed lasers, in particular to a pulsed laser with narrow pulse width. Background technique [0002] Lidar is an active sensor that uses laser signals of specific wavelengths to scan the surface of an object to obtain relevant characteristic information on the surface of the object. Compared with ordinary microwave radar, lidar has the advantages of high resolution, good concealment, strong anti-interference ability, small size and light weight. At present, most laser radars use pulsed lasers as the time-of-flight (TOF) ranging scheme at the transmitter. For all types of laser radars, the limit ranging distance, point cloud density, ranging accuracy and measurement repeatability are all important. An important parameter to characterize its detection performance. [0003] In the lidar that uses pulsed lasers as the transmitter, the pulse width of the pulsed laser is one of the parameters that ...

AI Technical Summary

Problems solved by technology

The pulse width of the existing laser pulser is wide, and the point cloud density of the corresponding laser radar is low, the ranging accuracy and repeatability are poor, and the limit ranging distance is short

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