BOAR: Biprism based optical autocorrelation with retrieval
Résumé
A direct comparison of high-speed methods for the numerical Abel transform Review of Scientific Instruments 90, 065115 (2019); https://doi.org/10.1063/1.5092635 Cryogen-free variable temperature scanning SQUID microscope Review of Scientific Instruments 90, 063705 (2019); https://doi. ABSTRACT A simple and compact single-shot autocorrelator is presented and analyzed in detail. The autocorrelator is composed of two elements only: a Fresnel biprism used to create two temporally delayed replicas of the pulse to characterize and a camera in which two-photon absorption takes place. The two-photon absorption signal obtained in the camera can be used to retrieve the pulse duration , the frequency chirp, and the pulse spectrum, provided that a Gaussian temporal shape is assumed. Thanks to its extreme simplicity , the autocorrelator is robust and easy to align. The presented design can theoretically characterize the pulse duration from about 25 fs to 1.5 ps in the two-photon spectral range of the camera (1200-2400 nm). Finally, a proof-of-principle demonstration is also performed at 3.1 µm by using an InGaAs camera, whose two-photon spectral range is located further in the infrared (1800-3400 nm).
Domaines
Physique [physics]Origine | Fichiers éditeurs autorisés sur une archive ouverte |
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