Dispersive wave generation in single higher-order modes of a large-core silica step-index fiber with pulse energies up to 12 nJ

Andrea Arduin, Lars Søgaard Rishøj, Jesper Lægsgaard*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The generation of light in a laser system is constrained by the gain medium, limiting the available wavelengths. We demonstrate in-fiber generation of ultrafast pulses between ∼550 and 800 nm via dispersive wave generation (DWG), in higher-order modes (HOMs). Using higher-order modes enables power scaling, due to their large effective area compared to the fundamental modes of single-mode fibers and dispersion engineering, even in simple step-index fibers. The process occurs in a single higher-order mode, which we excite using passive glass components (an axicon and two telescopes). The output pulses have energies up to 12 nJ at the biologically relevant wavelength of 705 nm.

Original languageEnglish
JournalOptics Letters
Volume49
Issue number8
Pages (from-to)2085-2088
ISSN0146-9592
DOIs
Publication statusPublished - 15 Apr 2024

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