Nanoimprinting and tapering of chalcogenide photonic crystal fibers for cascaded supercontinuum generation

Christian R. Petersen, Mikkel B. Lotz, Getinet Woyessa, Amar N. Ghosh, Thibaut Sylvestre, Laurent Brilland, Johann Troles, Mogens H. Jakobsen, Rafael Taboryski, Ole Bang

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Abstract

Improved long-wavelength transmission and supercontinuum (SC) generation is demonstrated by antireflective (AR) nanoimprinting and tapering of chalcogenide photonic crystal fibers (PCFs). Using a SC source input spanning from 1 to 4.2 μm, the total transmission of a 15 μm core diameter PCF was improved from ∼53% to ∼74% by nanoimprinting of AR structures on both input and output facets of the fiber. Through a combined effect of reduced reflection and redshifting of the spectrum to 5 μm, the relative transmission of light >3.5  μm in the same fiber was increased by 60.2%. Further extension of the spectrum to 8 μm was achieved using tapered fibers. The spectral broadening dynamics and output power were investigated using different taper parameters and pulse repetition rates.

Original languageEnglish
JournalOptics Letters
Volume44
Issue number22
Pages (from-to)5505-5508
ISSN0146-9592
DOIs
Publication statusPublished - 15 Nov 2019

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