Spectral broadening of ultraviolet dispersive waves in gas-filled hollow-core fiber using pump pulse modulation

Callum Robertson Smith, Abubakar Isa Adamu, Mattia Michieletto, Ole Bang

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

UV supercontinuum laser sources based on resonant dispersive wave (RDW) generation in gas-filled hollow-core (HC) fibers offer an attractive architecture for numerous applications. However, the narrow UV spectral peak inherent to RDW generation limits the suitability for applications that require broad spectral coverage within the UV region such as spectroscopic scatterometry. In this Letter, we demonstrate how the UV spectrum can be shaped by modulating the peak power of the pump pulses driving the RDW generation, thereby creating a broadened and flattened UV spectrum. Using an argon-filled anti-resonant HC fiber, we generate a UV spectrum with a center wavelength of 323.6 nm with an FWHM of 51.7 nm, corresponding to a relative bandwidth of 16.1%.
Original languageEnglish
JournalOptics Letters
Volume45
Issue number24
Pages (from-to)6744-6747
ISSN0146-9592
DOIs
Publication statusPublished - 2020

Fingerprint Dive into the research topics of 'Spectral broadening of ultraviolet dispersive waves in gas-filled hollow-core fiber using pump pulse modulation'. Together they form a unique fingerprint.

Cite this