Temporal characterization of broadband femtosecond laser pulses by surface third-harmonic dispersion scan with ptychographic retrieval

• Tipo: Artigo em Revista Científica Internacional
• Data: 2022

Autores

Gomes, T (Autor) Outra; Canhota, M (Autor) FCUP; Crespo, H (Autor) FCUP

Revista

Título: Optics Letters

Vol. 47

Páginas: 3660-3663

ISSN: 0146-9592

Editora: Optical Society of America

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 0 Citações

Outras Informações

ID Authenticus: P-00W-WQX

DOI: 10.1364/ol.460069

Abstract (EN): We present a new, to the best of our knowledge, variant of dispersion scan (d-scan) based on surface third-harmonic generation (STHG) and a ptychographic algorithm tailored for full retrieval (amplitude and phase) of broadband laser pulses. We demonstrate the technique by temporally measuring and compressing few-cycle pulses with 7 fs and 2.5 nJ from a Ti:sapphire oscillator, using a sapphire window as the nonlinear medium. The results are in very good agreement with standard second-harmonic d-scan measurements based on a nonlinear crystal. The intrinsically broadband and phase-matching-independent nature of STHG make this technique very suitable for the characterization of ultrashort laser pulses over a broad wavelength range extending into the mid-infrared. (C) 2022 Optica Publishing Group

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4