Single-shot d-scan technique for ultrashort laser pulse characterization using transverse second-harmonic generation in random nonlinear crystals

Summary, in English

We demonstrate a novel dispersion-scan (d-scan) scheme for single-shot temporal characterization of ultrashort laser pulses. The novelty of this method relies on the use of a highly dispersive crystal featuring antiparallel nonlinear domains with a random distribution and size. This crystal, capable of generating a transverse second-harmonic signal, acts simultaneously as the dispersive element and the nonlinear medium of the d-scan device. The resulting in-line architecture makes the technique very simple and robust, allowing the acquisition of single-shot d-scan traces in real time. The retrieved pulses are in very good agreement with independent frequency-resolved optical grating measurements. We also apply the new single-shot d-scan to a terawatt-class laser equipped with a programmable pulse shaper, obtaining an excellent agreement between the applied and the d-scan retrieved dispersions.

• Author: F. J. Salgado-Remacha; B. Alonso; H. Crespo; C. Cojocaru; J. Trull; R. Romero; M. Lopez-Ripa; P. T. Guerreiro; F. Silva; M. Miranda; A. L'Huillier; C. L. Arnold; I. J. Sola
• Department/s: Department of Physics
• Publishing year: 2020-07-15
• Language: English
• Pages: 3925-3928
• Publication/Series: Optics Letters
• Volume: 45
• Issue: 14
• Links: http://dx.doi.org/10.1364/OL.397033
• Document type: Journal article
• Publisher: Optical Society of America
• Topic: Other Physics Topics
• Status: Published
• ISBN/ISSN/Other: ISSN: 0146-9592