arXiv 2104.001362021-04physics.opticsphysics.app-ph

Advanced Multi-Mode Phase Retrieval For Dispersion Scan

Alex M. Wilhelm, David D. Schmidt, Daniel E. Adams, Charles G. Durfee

备注：: 17 pages, 8 figures

英文摘要：

We present a phase retrieval algorithm for dispersion scan (d-scan), inspired by ptychography, which is capable of characterizing multiple mutually-incoherent ultrafast pulses (or modes) in a pulse train simultaneously from a single d-scan trace. In addition, a form of Newton's method is employed as a solution to the square root problem commonly encountered in second harmonic pulse measurement techniques. Simulated and experimental phase retrievals of both single-mode and multi-mode d-scan traces are shown to demonstrate the accuracy and robustness of the algorithm.

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