Calibration pulse position determination and noise processing of streak camera
A key problem in streak camera data processing is how to determine the position of the signal pulse,and the results will be effected by the signal to noise ratio(SNR) of the experimental data and the signal pulse position determination method.In the paper,FWHM(half maximum and half width) method is used to determine the single pulse position.The method could determine the signal pulse position with sub-pixel precision when the SNR more than 100∶1.As for the data with bad signal to noise ratio(SNR less than 10∶1),a Fast Fourier Transform method is used to filter the noise first, then the pulse position is determined by the FWHM method.And the streak camera calibration data of the super-fast sweep rate was processed.The sweep speed is(0.214±0.002 9)ps/pixel.The linear dependent coefficient is 0.999 7,which shows the streak camera scanning linearity is good.