15 March 2013 The coherent artifact in modern pulse measurement
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We study multi-shot intensity-and-phase measurements of unstable trains of ultrashort pulses using spectral-phase interferometry for direct electric-field reconstruction (SPIDER), second harmonic generation (SHG) frequency-resolved optical gating (FROG), polarization gate (PG) FROG, and cross-correlation FROG (XFROG). An analytical calculation suggests that SPIDER cannot indicate instability in pulse trains well. Simulations confirm this and demonstrate that SPIDER only measures the coherent artifact. Further, the presence of instability cannot be distinguised from benign misalignment effects in SPIDER. FROG methods suggest instability by exhibiting clear disagreement between measured and retrieved traces.
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Michelle Rhodes, Michelle Rhodes, Günter Steinmeyer, Günter Steinmeyer, Justin Ratner, Justin Ratner, Rick Trebino, Rick Trebino, } "The coherent artifact in modern pulse measurement", Proc. SPIE 8611, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIII, 86110R (15 March 2013); doi: 10.1117/12.2003302; https://doi.org/10.1117/12.2003302

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