Pulse laser emission circuit based on laser diode

Abstract

The invention provides a pulse laser emission circuit based on a laser diode. The pulse laser emission circuit comprises a high voltage generator circuit and a drive circuit of the laser diode, wherein the high voltage generator circuit is used for supplying a high voltage source for the drive circuit; the drive circuit is realized by using a printed circuit board, the distance between a current amplifying chip and a switch MOS tube is as long as possible, and a ground pin of the laser diode and a source level of the switch MOS tube are connected through a long and thin connecting line; and the lengths of connecting lines among the switch MOS tube, the laser diode, a first capacitor and a second capacitor are as short as possible. The pulse laser emission circuit realizes the emission of high repetition frequency narrow-pulse laser, so that the operating distance and precision of laser ranging are effectively improved.

Description

technical field [0001] The invention belongs to the field of laser measurement, and in particular relates to a laser diode-based pulsed laser emission circuit, which is applied in the fields of laser radar vehicle intelligent anti-collision, urban construction and planning, laser proximity fuze, laser active guidance and the like. Background technique [0002] Pulsed laser measurement uses a laser as a light source and a laser as a carrier. According to the time-of-flight principle, the distance is measured by detecting the time difference between the laser emission pulse and the laser echo pulse. It has the advantages of simple structure, low price, high reliability, and anti-interference It has the advantages of strong performance and no need for cooperative targets, and has been widely used in civilian and military applications. [0003] Realizing high repetition frequency and narrow pulse of laser is an important means to improve the working distance, dynamic detection a...

AI Technical Summary

Problems solved by technology

Based on the design of the pulse laser emission circuit based on the laser diode, the circuit structure is simple and the theory is relatively sound. However, the laser diode is affected by the characteristics of the laser semiconductor and the distributed inductance and distributed capacitance of the drive circuit. It is very difficult to obtain a narrow pulse waveform with less oscillation and high peak power. Difficult; moreover, the MOS tube in the circuit needs 150V high voltage to generate a large current to charge and discharge the capacitor, and a large voltage drop will be generated on the wiring during the circuit layout, consuming most of the power, so that the voltage drop on the laser diode Reduced, the peak power is reduced, and a unique layout of the circuit is required

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