Ultra-broadband frequency shifting of laser pulses in a square multicore chalcogenide fiber

The process of Raman frequency shifting of out-of-phase laser pulses in fibers with a square configuration of weakly coupled cores having two or more zero dispersion wavelengths has been studied. The use of out-of-phase distributions in multicore fibers makes it possible to increase pulse energies b...

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Veröffentlicht in:Optics letters 2024-03, Vol.49 (6), p.1500-1503
Hauptverfasser: Balakin, Alexey, Skobelev, Sergey, Andrianov, Alexey, Anashkina, Elena, Litvak, A G
Format: Artikel
Sprache:eng
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Zusammenfassung:The process of Raman frequency shifting of out-of-phase laser pulses in fibers with a square configuration of weakly coupled cores having two or more zero dispersion wavelengths has been studied. The use of out-of-phase distributions in multicore fibers makes it possible to increase pulse energies by orders of magnitude in comparison with the case of single-core fibers. Conditions for the stability of out-of-phase laser pulses are determined and confirmed by numerical simulations. A configuration of chalcogenide multicore fiber with three zero dispersion wavelengths is proposed, allowing ultra-broadband frequency shifting of laser pulses up to 6.2 m with an energy efficiency of more than 25%.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.514070