Adjustable pulse width pulse generating circuit for semiconductor laser

Abstract

The present invention discloses an adjustable pulse width pulse generating circuit for a semiconductor laser. The adjustable pulse width pulse generating circuit comprises trigger signals, an avalanche transistor pulse generating circuit and a step recovery diode shaping circuit; the avalanche transistor pulse generating circuit receives the trigger signals; and the step recovery diode shaping circuit is connected with the avalanche transistor pulse generating circuit. According to the adjustable pulse width pulse generating circuit for the semiconductor laser of the invention, the avalanche characteristic of an avalanche transistor and the step characteristic of a step recovery diode are utilized to generate large-amplitude narrow pulse signals; and the pulse width of the narrow pulse signals can be as low as 165ps and can be adjusted. The adjustable pulse width pulse generating circuit for the semiconductor laser can be conveniently applied to the driving of the semiconductor laser.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to an adjustable pulse width pulse generation circuit for semiconductor lasers. Background technique [0002] Pulsed semiconductor lasers have great potential application value in optical fiber communication, laser ranging, laser fuze, 3D image system, data storage and other fields. Semiconductor lasers can use gain conversion technology to directly generate laser pulses. Compared with solid-state lasers, they have the advantages of small size and low price. The characteristics of the optical pulse signal output by the semiconductor laser are directly controlled by the electrical pulse, so the characteristics of the electrical pulse have a crucial impact on the output characteristics of the optical pulse of the semiconductor laser. In order to obtain a higher peak power of the optical pulse, the amplitude of the electrical pulse signal needs to be as large as possible and the w...

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Problems solved by technology

[0005] The pulse width of the output signal of the pulse generator in the prior art is generally above 200 ps, ​​and the amplitude of the output pulse is not high enough, and the pulse width cannot be adjusted. These shortcomings limit the use of pulse signals in driving semiconductor lasers

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