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Ultraviolet pulse compression via cross-phase modulation in a hollow-core fiber
Optica ( IF 10.4 ) Pub Date : 2024-02-13 , DOI: 10.1364/optica.513635 Yujiao Jiang 1, 2 , John Pascal Messerschmidt 1 , Fabian Scheiba 1 , Igor Tyulnev 1 , Lu Wang 1 , Zhiyi Wei 2, 3 , Giulio Maria Rossi 1
Optica ( IF 10.4 ) Pub Date : 2024-02-13 , DOI: 10.1364/optica.513635 Yujiao Jiang 1, 2 , John Pascal Messerschmidt 1 , Fabian Scheiba 1 , Igor Tyulnev 1 , Lu Wang 1 , Zhiyi Wei 2, 3 , Giulio Maria Rossi 1
Affiliation
The generation of few-femtosecond pulses with high energy and tunable spectrum in the ultraviolet region is an ongoing challenge in ultrafast optics. Harnessing the cross-phase modulation between an intense near-infrared pulse and its third-harmonic, co-propagating in a gas-filled hollow-core fiber, we demonstrate spectral tuning, broadening, and temporal compression in the ultraviolet range. Ultraviolet pulses with negative chirp, leading to self-compression down to 6 fs during propagation in air, and energy {\gt}{10}\;\unicode{x00B5}{\rm J} were characterized. This technique opens a way towards the realization of few-fs pulses with high energy, tunable over most of the ultraviolet range.
更新日期：2024-02-13
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