Wireless transmission method based on femtosecond laser and electric energy transmission device

Abstract

The invention discloses a wireless transmission method based on a femtosecond laser and an electric energy transmission device. The flashover discharging between a femtosecond laser transmitter and an electric signal transmitter is collected, the processing is carried out through the wireless transmission technology to obtain stable voltage, which means that the nonlinear phenomenon-filamentation generated by the transmission of a femtosecond laser pulse in the air is used, an electric signal receiving electrode carries out flashover discharging in the femtosecond laser pulse, the voltage pulse of the flashover discharging is filtered and converted into alternating current, and the femtosecond laser pulse is used to carry out far distance wireless power transmission. The peak-peak value of alternating current voltage coupled by a non-contact transformer is reduced to one tenth of the original or even lower, the insulation degree of a back stage circuit can be greatly reduced, and the cost of the back stage circuit is greatly reduced. The output voltage of the invention is direct current voltage which can be used as a power supply by much equipment, and power use requirements in some special conditions such as the wireless transmission of a communication satellite and the power supply of a high speed electric vehicle can be solved.

Description

technical field [0001] The invention relates to the technical field of laser, non-contact power supply and automatic control, and in particular to a femtosecond laser-based wireless power transmission method and power transmission device. Background technique [0002] When high-intensity femtosecond laser pulses are filamented in the air, a very long low-density plasma column will be generated. The generated plasma column can be used to excite high-voltage electricity, and conduct high-voltage electricity to several meters to several meters in the air. Ten kilometers, or even farther away. Femtosecond laser power generation technology is expected to solve the power demand in some special situations, such as wireless power transmission of communication satellites, power supply of high-speed electric vehicles, etc. The strength of the pulse signal transmitted by the femtosecond laser can be set, and the voltage pulse of several kV to several thousand kV can be obtained on the...

AI Technical Summary

Problems solved by technology

Although many physical mechanisms are at play when the pulse propagates in the filament, the formation process is mainly due to two nonlinear effects: on the one hand, the optical Kerr effect, which cancels the diffraction and focuses the beam according to itself; on the other hand, the multiphoton absorption confines the beam strength

Gas ionization reduces the refractive index of the medium causing the beam to defocus

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