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Autocorrelators: techniques and applications
This lecture covers the principles and applications of autocorrelators in laser systems, including basic laser operation, noise characteristics, ultrafast lasers, and frequency conversion. It explains the operation of streak cameras, photodiodes, and the pulse propagation through dispersive media. The instructor discusses the concepts of first and second-order autocorrelation, as well as the differences between interferometric and intensity autocorrelation. The lecture also delves into Frequency Resolved Optical Gating (FROG) techniques for pulse characterization, showcasing examples of 2D traces and their interpretations.