Temporal Characterization of Sub-3-fs, μJ-level Deep UV Pulses Generated by Resonant Dispersive Wave Emission

Marta Pini, Federico Cappenberg, Lorenzo Colaizzi, Federico Vismarra, Matteo Lucchini, Aurora Crego, Christian Brahms, John Travers, Rocío Borrego Varillas, Maurizio Reduzzi, Mauro Nisoli

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The generation of few-femtoseconds laser pulses in the Deep Ultraviolet (DUV) spectral region (200–300 nm) is crucial for the investigation of ultrafast electronic dynamics in several classes of molecules. As prominent examples, both DNA nucleobases [1], as well as donor-acceptor systems, relevant for optoelectronic applications, readily absorb in this spectral range. In this context, Resonant Dispersive Wave (RDW) emission in gas-filled Hollow Core Fibers (HCF) is a novel and efficient way to generate μJ -level DUV few-fs pulses, continuously tuneable with gas pressure [2], with a consequent advantage in the proper matching of specific molecular excitations. The ultrashort time duration of such pulses is crucial for their application in high temporal resolution pump-probe spectroscopy experiments, but their large bandwidth in a notoriously challenging spectral region also renders their temporal characterization particularly demanding. Here, we report on the direct temporal characterization of few-cycle DUV pulses generated by RDW emission in a Neon-filled HCF, demonstrating near transform-limited pulses in the DUV.
Original languageEnglish
Title of host publication2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
ISBN (Electronic)9798350345995
Publication statusPublished - 4 Sept 2023


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