Programmable multi-pulse green laser was developed to satisfy the application requirements of a planer laser induced fluorescence and velocity interferometer system for any reflector.In the process of amplification,because the front edge gain of the laser pulse was fast and the back edge gain was slow,the laser pulse waveform was distorted.Adopting light intensity programmable technology,input the long pulse voltage waveform into an arbitrary waveform generator and load it onto the electro-optic modulator.In order to control the output light intensity in the time domain and output multiple pulses at the same time,the software was used to edit the long pulse voltage waveform according to the feedback of the output laser waveform.The results indicate that the waveform distortion during the amplification process is corrected.The following green laser square wave pulses are obtained:Single pulse with 110 ns pulse width;double pulses with 5 μs pulse interval and 50 ns pulse width;three pulses with pulse widths of 40 ns,50 ns and 60 ns and pulse interval of 2 μs and 1 μs respectively.Of course,if necessary,by editing the long pulse voltage waveform,we can also get pulses of other parameters so as to obtain a laser with adjustable pulse number,waveform,pulse width,and pulse interval.This study provides a reference for planar laser-induced fluorescence technology and reflector velocity interferometer system.
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