Accueil > articulos > Single-shot d-scan technique for ultrashort laser pulse characterization using transverse second-harmonic generation in random nonlinear crystals
Resumen: 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. Idioma: Inglés DOI: 10.1364/OL.397033 Año: 2020 Publicado en: Optics Letters 45, 14 (2020), 3925-3928 ISSN: 0146-9592 Factor impacto JCR: 3.776 (2020) Categ. JCR: OPTICS rank: 22 / 99 = 0.222 (2020) - Q1 - T1 Factor impacto SCIMAGO: 1.524 - Atomic and Molecular Physics, and Optics (Q1)