Chromatic dispersion-free diffraction grating based single-shot autocorrelator

A chromatic dispersion-free diffraction-grating single-shot autocorrelator (grating-SSA) is proposed. The grating-SSA is described theoretically, and its performance is experimentally characterized. The results demonstrate that the SSA measurement range can be expanded as expected, and the measurement accuracy is the same as that of a conventional SSA. The measurement range of an optimized design can be expanded to almost three times as wide as that of the same size BBO-based conventional SSA, achieving a 100 ps measurement range for an 30 mm diameter non-linear crystal.