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, capable of simultaneously measuring two-dimensional information (one-dimensional is the time width of the pulse autocorrelation function, and one-dimensional is the distribution of the width in space), And use this feature to realize single calibration, which is used for single measurement of femtosecond to picosecond ultrashort pulse laser and 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 measure. When measuring the amplified pulse, because the amplified pulse has larger pulse intensity and pulse width fluctuations than the oscillation level pulse, a second-order single-shot autocorrelation measuring instrument is usually used. The structure o...

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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