Low-jitter high-intensity super-continuum spectrum light source generated in gas, and detection system thereof

Abstract

The invention discloses a low-jitter high-intensity super-continuum spectrum light source generated in gas. The light source comprises an ultrafast laser, a high-voltage power supply, a metal electrode connected with the high-voltage power supply, a focusing lens arranged along the emergent laser direction of the ultrafast laser, and a detection system of the focusing lens. Based on the electrostatic interaction of an external electric field on free electrons in an ultrafast laser gas plasma filament channel, the supercontinuum laser generated by the filament is regulated and controlled, and an ultrafast and supercontinuum coherent light source with high stability, high repetition frequency and high energy is obtained. The light source has extremely important significance in application based on the super-continuous white laser, such as remote atmospheric detection, ultra-short laser pulse compression, high-capacity information communication and ultra-fast laser spectrum.

Description

technical field [0001] The invention relates to the coupling of an external electric field and nonlinear filamentation in an ultrafast laser gas, supercontinuum laser generation based on ultrafast strong laser filamentation, and the control of the plasma in the ultrafast laser filament by an external electric field, thereby controlling the filament Generation of supercontinuum laser, and detection of pointing stability and intensity stability of supercontinuum laser. Background technique [0002] When an ultrafast intense laser pulse propagates in an optically transparent medium, the spectrum of the laser pulse will be broadened due to the intensity-dependent self-phase modulation nonlinear effect, that is, a supercontinuum light source is generated. The supercontinuum can cover wavelengths from ultraviolet to infrared, and has good coherence, so it is also called "white light" laser. With the discovery and development of the supercontinuum laser, it has been innovatively a...

AI Technical Summary

Problems solved by technology

However, there is a bottleneck problem in the supercontinuum light source of ultrafast and strong laser gas filamentation, that is, when the repetition frequency of the filamentation laser is greater than 100 Hz, the self-heating effect during the filamentation process will affect the spatial pointing stability and intensity stability of the supercontinuum light source. Poor, the higher the laser repetition rate, the more significant the effect

This is a difficult problem faced by the generation of supercontinuum light sources based on high-repetition-frequency filaments, and it also limits its application.

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