Picosecond laser device and method for inhibiting first pulse in picosecond laser device

Abstract

The invention discloses a picosecond laser device and a method for inhibiting a first pulse in the picosecond laser device. The method comprises the steps that a switch of an amplifier is turned on through a switch driving source during start to oscillate noise radiation of the amplifier in an amplification cavity of the amplifier for multiple times so as to form nanosecond laser pulses, and stored energy of a gain transistor of the amplifier is consumed in the forming and growing process of the laser pulses. When the stored energy of the gain transistor is reduced to a preset value, the switch of an amplifier is turned off through the switch driving source to make the amplification cavity of the amplifier output nanosecond-order laser pulses be in a high-loss state. A picosecond laser signal is obtained from an oscillator through a pulse menu device and is injected into the amplification cavity of the amplifier, and the gain transistor conducts multi-time amplification on the picosecond laser signal and outputs the signal. In the mode, by the adoption of the picosecond laser device and the method, first pulse energy of picosecond laser signals can be inhibited, the service life of optical components and devices can be prolonged, and a laser processing effect can be improved.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a picosecond laser and a method for suppressing the first pulse in the picosecond laser. Background technique [0002] The picosecond laser with a pulse energy of tens of μJ (microjoule) and a repetition rate of several hundred kHz (kilohertz) can meet the fine processing requirements of many materials and can be widely used in laser cutting and engraving , Scribing and marking and other fields. Picosecond laser processing technology has become a research hotspot in the field of laser processing, leading the trend of future laser processing. Since the single pulse energy directly generated by the oscillator is only on the order of nJ (nanojoule), it cannot meet the needs of laser processing. In the prior art, the power is increased and high-energy laser signals with excellent performance are obtained by applying regenerative amplification technology. The regenerative amplifier ...

AI Technical Summary

Problems solved by technology

For picosecond lasers, such high-energy pulses can easily cause damage to optical components and reduce the service life of the laser

At the same time, when processing materials that are sensitive to pulse energy, it may cause material cracks, defects, and inconsistent processing effects, which greatly affect the effect of fine processing.

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