Multifunctional wide-range ultra-short pulsed laser autocorrelator

Abstract

The invention relates to a multifunctional wide-range ultra-short pulsed laser autocorrelator which comprises a precision mobile platform, a first right-angle reflector, a chopper, a second right-angle reflector, a parabolic mirror, a two-photon detector and a signal acquisition system, wherein the first right-angle reflector is fixed on the precision mobile platform and comprises two reflectors; the chopper is positioned at the front end of one reflector in the first right-angle reflector, a first light path is formed between the chopper and one reflector in the first right-angle reflector, and a first beam splitter is placed on the first light path; the second right-angle reflector comprises two reflectors, the second right-angle reflector is positioned at one side of the first light path, and a second light path is formed between the first beam splitter and one reflector in the second right-angle reflector; the parabolic mirror is positioned at the other side of the first light path, a third light path is formed between the parabolic mirror and the other reflector in the second right-angle reflector, a second beam splitter is placed on the third light path, and a fourth light path is formed between the second beam splitter and the other reflector in the first right-angle reflector; the two-photon detector is positioned at one side of the parabolic mirror; and the signal acquisition system is electrically connected with the two-photon detector.

Description

technical field [0001] The invention relates to the technical field of laser parameter measurement, in particular to a multifunctional large-range ultrashort pulse laser autocorrelator. Background technique [0002] Ultrashort pulse laser refers to the laser pulse with a duration of picosecond or femtosecond level. Its main feature is that the duration is extremely short. Therefore, the measurement of ultrashort pulse time domain width is the most important method in the measurement of ultrashort pulse laser parameters. most important question. At present, the commonly used ultrashort pulse parameter measurement methods include autocorrelation method, frequency-resolved optical switch method and spectral phase coherence direct electric field reconstruction method. Among various measurement methods, the autocorrelation method is the simplest, most direct and most commonly used measurement method, which can realize the measurement of the pulse width of femtosecond-level ultra...

AI Technical Summary

Problems solved by technology

At present, the correlators built in the market and in the laboratory only have one of the functions of intensity correlation and fringe resolution correlation. Two advantages of accurate and reliable measurement results

Although Wei Zhiyi and others have designed a utility model patent (ZL: 02202596.0) for a "dual-function small-scale ultrashort laser pulse autocorrelation measuring instrument", they still use one arm of the linearly moving Michelson interferometer to realize the intensity autocorrelation, vibration Michelson The other arm of the interferometer realizes the fringe resolution autocorrelation. This utility model patent only combines the two structures in one system, but does not realize the organic combination of the two, nor does it break through the fringe resolution autocorrelation, which is limited by the vibration amplitude of the vibration device.

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