Method for synthesizing femto-second grade ultrashort pulses based on cerenkov radiation

Abstract

The invention discloses a method for synthesizing femto-second grade ultrashort pulses based on cerenkov radiation. The method includes the steps that 1, a reference light path is established, non-linear crystals are put on a six-dimension rotary horizontal-movement platform, the angle of the non-linear crystals is adjusted by rotating the six-dimension rotary horizontal-movement platform, and therefore non-linear cerenkov radiation occurs on the inner surfaces of the non-linear crystals; 2, according to the reflecting angle of incident laser on the inner surfaces of the non-linear crystals, the non-linear cerenkov radiation angle of each level of frequency doubling light in the crystals is determined; 3, fundamental frequency light, double frequency light, triple frequency light, quadruplicated frequency light, quintuple frequency light and higher-order frequency-doubling light generated by the incident laser emerge at own radiation angles, and are modulated by an amplitude type liquid crystal light modulator and a phase type liquid crystal light modulator, parallel transmission directions of all orders of light waves are changed into converging transmission directions through a second dispersing prism, and the light waves are synthesized into one beam of femto-second grade ultrashort pulses through a third dispersing prism. With the method, the synthesizing process of femto-second grade light wave is achieved, efficiency is high, and fidelity is high.

Description

technical field [0001] The invention belongs to the field of optics, and in particular relates to a method for realizing sub-femtosecond ultrashort pulse synthesis based on Cerenkov radiation. Background technique [0002] The rapid development of ultrashort pulse laser technology has greatly promoted the research on the interaction between laser and matter. From the early nanosecond pulses, picosecond pulses to the current femtosecond pulses and even attosecond pulses, these ever-shortening pulse light sources are important for physics, Research in the fields of chemistry, biology, and medical treatment provides powerful tools, and at the same time provides the possibility for the discovery and exploration of new phenomena and laws of laser-matter interaction with shorter time scales and higher time resolution. Ultrashort pulse light waveform synthesis technology is one of the important means to realize the manipulation of electronic microscopic behavior on the sub-femtosec...

AI Technical Summary

Problems solved by technology

However, the process of generating high-order harmonics based on birefringence phase matching and quasi-phase matching faces problems such as phase jitter, crystal precision cutting, and difficulty in polarization preparation, which poses a huge challenge to the preparation of integrated commercial optical function generators.

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