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Journal Articles Review of Scientific Instruments Year : 2019

BOAR: Biprism based Optical Autocorrelation with Retrieval

S Lecorné
  • Function : Author
E Szmygel
O. Faucher
P. Béjot


A simple and compact single-shot autocorrelator is presented and analyzed in details. 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. As it does not use any nonlinear crystal, its spectral working range is very broad (1200-2400 nm). The presented design can characterize pulse duration from 25 fs to 1.5 ps. Nevertheless, it is shown that using a NaCl biprism instead should allow to measure pulse duration down to 12 fs. Finally, a proof-of-principle demonstration is also performed in a wavelength range located further in the infrared (1800-3400 nm) by using a InGaAs camera.
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Dates and versions

hal-02396622 , version 1 (06-12-2019)



F. Billard, A. Dubrouil, E. Hertz, S Lecorné, E Szmygel, et al.. BOAR: Biprism based Optical Autocorrelation with Retrieval. Review of Scientific Instruments, 2019, ⟨10.1063/1.5054357⟩. ⟨hal-02396622⟩
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