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 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 μm with an energy efficiency of more than 25%.

Citation

Alexey Balakin, Sergey Skobelev, Alexey Andrianov, Elena Anashkina, A G Litvak. Ultra-broadband frequency shifting of laser pulses in a square multicore chalcogenide fiber. Optics letters. 2024 Mar 15;49(6):1500-1503

PMID: 38489435

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