23 February 2018 Pulse characterization by cascading nonlinearity inside a spectrometer (CaNIS)
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Abstract
A complete ultrashort pulse diagnostic requires a linear spectrum associated with a nonlinear autocorrelation or interferometric measurement. A new method is presented requiring only a grating spectrometer and two second harmonic crystals. Spectra of fundamental, second harmonic, and two cascaded spectra are used to reconstruct the spectral phase. A few proof-of-concept examples with simple phases are demonstrated using Nelder-Mead algorithm. A differential evolution genetic algorithm is introduced when the pulse has a more complicated shape or phase.
Conference Presentation
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Ning Hsu, Ning Hsu, Luke Horstman, Luke Horstman, Jean-Claude Diels, Jean-Claude Diels, } "Pulse characterization by cascading nonlinearity inside a spectrometer (CaNIS)", Proc. SPIE 10517, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications III, 105170M (23 February 2018); doi: 10.1117/12.2290848; https://doi.org/10.1117/12.2290848
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