A new method to measure the ultrashort pulse laser time jitter using autocorrelator

The power spectrum method to characterize mode-locked laser time jitter less than tens of femtosecond faces challenges from both the noise of the reference oscillator and the photodetector conversion rate. A method using autocorrelator to measure the time jitter probability density function is suggested. Theoretical analysis and numerical simulation indicate that the time jitter less than 30 fs can be measured correctly by high accurate autocorrelator.