Narrow pulse width pulse laser

Abstract

The invention relates to a pulse laser with a narrow pulse width, and the pulse laser comprises a circuit substrate, a laser chip, capacitors and a field effect transistor, wherein the field effect transistor, the capacitors and the laser chip are all electrically connected to the circuit substrate, and the capacitors are arranged between the field effect transistor and the laser chip and are arranged in the extension direction of a gap between the field effect transistor and the laser chip. According to the technical scheme provided by the embodiment of the invention, the layout of the structural components in the pulse laser is optimized, and the distance between the field effect transistor and the laser chip is reduced, so that the layout of the structural components is more compact, the loop inductance of the pulse laser is reduced, and the discharge speed of the pulse laser is higher; when the pulse laser works, the pulse width output by the pulse laser is compressed, and the pulse laser with the narrow pulse width is achieved. Further, when the method is applied to the laser radar, larger point cloud density, higher ranging precision, better repeatability and larger limit ranging distance can be achieved.

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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