Single scaling second-order monoemitting autocorrelation measurer

Abstract

The laser pulse to be tested is passed through beam splitter and separated into two beams, one beam is passed through first total reflector and second total reflector, and fed into double frequency crystal, another beam is passed through an echelon reflection face angle reflector and third total reflector and fed into double frequency crystal. The laser pulse outputted on the detection element connected with computer. Said invention can implement one-dimensional space resolved simple second-order related measurement, and utilize one pulse signal and one measurement to can simultaneously scale and collest dwo-D plane information.

Description

Technical field: [0001] The invention relates to a second-order single-shot autocorrelation measuring instrument capable of single calibration, which can simultaneously measure two-dimensional information (one-dimensional is the time width of pulse autocorrelation function, and one-dimensional is the spatial distribution of the width), And use this feature to achieve a single calibration, which is used for the single measurement of femtosecond to picosecond ultrashort pulse laser and the measurement of pulse width information at different positions of the laser wavefront. Background technique: [0002] With the development of ultrashort pulse lasers, the measurement of ultrashort laser pulses has become a frequently used measurement measure. Among them, when measuring the amplified pulse, the pulse intensity and pulse width of the amplified pulse fluctuate greatly compared with the oscillating pulse, so the second-order single-shot autocorrelation measuring instrument is usually ...

AI Technical Summary

Problems solved by technology

Although taking the average calibration data through multiple measurements can reduce the reading error to a certain extent, multiple measurements will face the reciprocating error of the thousandth screw. At the same time, for the chirped pulse amplification system, the energy, pulse width, and waveform of the amplified pulse There will be fluctuations (the general repeatability index is 5%), which will inevitably bring more errors to multiple calibrations

[0007] Secondly, in order to accurately measure the readings, a relatively advanced digital oscilloscope must be used, and even then, only the shape and width of the pulse can be obtained, but not more specific numerical information, and it is impossible to accurately fit and analyze the relevant curves

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