Continuously adjustable nanosecond-impulse semiconductor laser driving power supply

A technology of driving power supply and nanosecond pulse, applied in semiconductor lasers, lasers, laser parts and other directions, can solve the problems of difficulty in generating large current, high voltage driving of avalanche tubes, unsuitable for narrow pulse power supply, etc., to achieve the effect of ensuring safety

Active Publication Date: 2008-02-27
安徽中科春谷激光产业技术研究院有限公司
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Problems solved by technology

The avalanche tube output exciter can obtain better waveforms, but there are still some problems in engineering applications: a single avalanche tube cannot provide a large current, and in order to obtain the current required for work, multiple avalanche tubes need to be used in parallel, which needs to be solved Synchronous triggering, equal distribution of current and other technical problems, otherwise it is easy to produce double peaks or recoil; it is difficult to continuously adjust the output pulse width; avalanche tubes need a large voltage drive, which is easy to produce series in high-frequency signals around
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  • Continuously adjustable nanosecond-impulse semiconductor laser driving power supply
  • Continuously adjustable nanosecond-impulse semiconductor laser driving power supply

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Embodiment Construction

[0031] Please refer to FIG. 1 . FIG. 1 is a structural block diagram of a continuously adjustable nanosecond pulsed semiconductor laser driving power supply according to the present invention. It can be seen from the figure that the driving power supply for the continuously adjustable nanosecond pulsed semiconductor laser of the present invention is composed of a square wave generator U1, a pulse shaping amplifier circuit U2, a power amplifier circuit U3 and a protection circuit U4, and its connection relationship is as follows:

[0032] The output terminal of the square wave generator U1 is connected to the input terminal of the pulse shaping amplifier circuit U2; the output terminal of the pulse shaping amplifier circuit U2 is connected to the gate of the power amplifier circuit U3 field effect transistor Q1; The source of the field effect transistor Q1 is connected to the output terminal Vcc of the protection circuit U4, and the drain is the positive output terminal of the d...

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Abstract

This invention relates to a continuously adjustable nanosecond semiconductor laser driving power source comprising: a square-wave generator, a shaping amplifier circuit, power amplifier circuit and protective circuit. This inventive power source has characters: (1), continuously adjustable of output pulse parameters such as: peak point current 0-20A, pulsewidth 10-200ns, repetition frequency 1HZ-1MHZ continuously adjustable; (2), having self-power-off protection, it can effectively ensure the semiconductor laser safety working.

Description

technical field [0001] The invention relates to a driving power supply of a semiconductor laser, which is a continuously adjustable nanosecond pulse semiconductor laser driving power supply. Background technique [0002] Pulsed semiconductor lasers have the advantages of small size, high efficiency, long life, and low price, and are now being used more and more widely. It is favored in many fields such as laser communication, laser radar, high-speed photography, pumped solid-state laser, and laser ranging. In order to obtain high-frequency and large-amplitude, nanosecond optical pulses, it is necessary to drive semiconductor lasers with nanosecond electrical pulses. [0003] At present, avalanche transistors, thyristors, insulated gate bipolar transistors and step recovery diodes are often used to obtain electric pulses. The avalanche tube output exciter can obtain better waveforms, but there are still some problems in engineering applications: a single avalanche tube cann...

Claims

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Application Information

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IPC IPC(8): H01S5/042H01S5/062
Inventor 楼祺洪张寿棋周军董景星魏运荣
Owner 安徽中科春谷激光产业技术研究院有限公司
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