Combined laser plasma anticonductance system and method

Abstract

The invention relates to a combined laser plasma anticonductance system and method. The system comprises at least one femtosecond laser used for starting plasmas, a nanosecond laser used for stabilizing the plasmas, a reflecting mirror used for reflecting the femtosecond laser and a coupling mirror used for laser coupling. The method comprises the following steps: step 1, starting the femtosecondlaser to generate femtosecond laser according to femtosecond starting parameters so as to form a plasma channel in the air; step 2, repeatedly refreshing the plasma channel by using the femtosecond laser according to a preset femtosecond repetition frequency; step 3, starting the nanosecond laser to generate nanosecond laser according to the nanosecond starting parameters, wherein the nanosecond laser is coupled with the femtosecond laser through the coupling mirror and then acts on the plasma channel; and step 4, repeatedly refreshing the plasma channel by using the nanosecond laser accordingto the preset nanosecond repetition frequency. According to the system and the method, the stability of the plasma channel can be improved, and the service life of the plasma channel can be prolongedso that a continuous plasma region with a relatively large region is formed.

Description

technical field [0001] The invention relates to the technical field of laser optoelectronic equipment, in particular to a combined laser plasma anti-guidance system and method. Background technique [0002] When enough energy is input to any substance, such as heating, it will be vaporized, and then the molecules and atoms will be ionized, and finally some charged gas with positive and negative ions and electrons mixed in a certain proportion will be formed. This substance is plasma. Due to its special properties and uses, plasma has been highly valued by major countries. With the gradual deepening of research, there are bright flashes and loud noises similar to stun grenades during the generation of plasma clouds, which bring great pain to the human body and can also be effective. Absorbing various energies, including laser and microwave, further expands the application space of plasma. [0003] Today, with the development of laser technology, it is easy to obtain lasers w...

AI Technical Summary

Problems solved by technology

After the atmospheric plasma channel is formed, due to the recombination of electrons and ions, the adsorption of electrons and neutral molecules, etc., the electron density in the channel drops rapidly. Usually, the lifetime of the plasma channel generated by a single femtosecond laser pulse is only a few nanoseconds. The life of the channel is short, the plasma region formed is very small, and a larger plasma region cannot be formed

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