An all-reflective, simple noncollinear second harmonic (SH) autocorrelator is
described for monitoring the shot-to-shot behavior of ultrashort high-power laser
pulses. Two mirrors are used for the dispersion-free splitting of a pulse into two
halves. One of the mirrors is able to adjust the delay time and angle between two
halves of the laser pulse in a nonlinear crystal. We present the possibility of
real-time measurement of the pulse duration, peak intensity (or energy), and the
pointing jitters of a laser pulse, by analyzing the spatial profile of the SH
autocorrelation signal measured by a CCD camera. The measurement of the shot-to-shot
variation of those parameters will be important for the detailed characterization of
laser accelerated electrons or protons.
© 2014 Optical Society of Korea
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