Pulse driving circuit based on vertical cavity surface emitting laser

A technology of vertical cavity surface emission and pulse drive, which is applied in the direction of lasers, laser components, semiconductor lasers, etc., and can solve the problems of slow laser drive speed, inability to produce fast frontier, high repetition frequency, and high-power laser narrow pulses, etc. It achieves the effect of convenient pulse large current output, simple structure, and reduced loop impedance

Inactive Publication Date: 2018-09-28
FUDAN UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the influence of laser packaging and stray parameters of the driving circuit circuit, the driving speed of the laser is slow, and it is impossible to generate fast frontier, high repetition frequency and high-power laser narrow pulses

Method used

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  • Pulse driving circuit based on vertical cavity surface emitting laser
  • Pulse driving circuit based on vertical cavity surface emitting laser
  • Pulse driving circuit based on vertical cavity surface emitting laser

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Experimental program
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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] figure 1 It contains three drive circuit structures based on vertical cavity surface emitting lasers.

[0024] figure 1 In (a), the current limiting unit 101 is connected in series with the DC charging power supply 106, the switch unit 102 is connected to one end of the vertical cavity surface emitting laser Vcsels 103, and the current detection unit 105 is connected to the other end of the vertical cavity surface emitting laser Vcsels 103; the current detection unit 105 Usually, it is connected in series with the energy storage unit 104, and the discharge current and the charging current of the energy storage unit 104 can be measured. The charging circuit of the entire circuit is composed of a DC charging power supply 106, a current limiting unit 101, an energy storage unit 104 and a current detection unit 105, and the discharge circuit is com...

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Abstract

The invention belongs to the technical field of the semiconductor laser driving circuit, and specifically relates to a pulse driving circuit based on a vertical cavity surface emitting laser. The structure circuit comprises a vertical cavity surface emitting laser, energy storage units, a switch unit, a driving chip, a current detection unit, a charge current-limiting unit, and an input-output interface; the components are integrated on one circuit board; a light-emitting surface electrode of the vertical cavity surface emitting laser is connected to a circuit board, the energy storage units are distributed around the vertical cavity surface emitting laser, and the switch unit is located on a back of the circuit board located by the vertical cavity surface emitting laser; the energy storage units, the vertical cavity surface emitting laser, the current detection unit and the switch unit form a discharge loop through circuit board via holes. By utilizing the dual-layer structure of thevertical cavity surface emitting laser and the circuit board multilayer circuit structure, the pulse discharge loop can be integrated in the 180-DEG space around the laser, the structure is simple, the distribution parameter is controllable, and the narrow pulse large current parameter is easy to produce, thereby obtaining the laser narrow pulse with high peak power.

Description

technical field [0001] The invention belongs to the technical field of semiconductor laser drive circuits, in particular to a pulse drive circuit based on a vertical cavity surface emitting laser (Vcsel), which can generate narrow pulses and large currents, and is mainly used in laser radar and related fields. Background technique [0002] At present, the structure of the semiconductor laser drive circuit is aimed at the edge-emitting semiconductor laser, and the circuit and the laser are often designed and packaged separately, and then undergo secondary integration. Due to the influence of the laser package and the stray parameters of the driving circuit circuit, the driving speed of the laser is slow, and it is impossible to generate fast frontier, high repetition frequency and high-power laser narrow pulses. The light-emitting surface of the laser based on the vertical cavity surface emission is perpendicular to the electrode, which is very convenient for the parallel con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/042
CPCH01S5/0428
Inventor 刘克富颜颖颖邱剑
Owner FUDAN UNIV
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