Request InfoFemto EasyBiprism-based optical autocorrelation with retrieval (BOAR) is a technique of ultrashort-pulses characterization from Femto Easy SAS that relies on interferometric single-shot autocorrelation and two-photon absorption. The time delay is encoded into a spatial interferogram, which is used to evaluate the pulse duration, the 2-ω spectrum, and the chirp. There is no nonlinear crystal and no phase-matching issues, making the spectral working range very broad, from 1200 to 2400 nm. The BOAR provides reliable measurements and is spatially resolved. 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