Ultraflat-top midinfrared coherent broadband supercontinuum using all normal As2S5-borosilicate hybrid photonic crystal fiber

Amine Ben Salem; Mbaye Diouf; Rim Cherif; Ahmadou Wague; Mourad Zghal

doi:10.1117/1.OE.55.6.066109

10 June 2016 Ultraflat-top midinfrared coherent broadband supercontinuum using all normal A_s2S₅-borosilicate hybrid photonic crystal fiber

Amine Ben Salem, Mbaye Diouf, Rim Cherif, Ahmadou Wague, Mourad Zghal

Author Affiliations +

Optical Engineering, Vol. 55, Issue 6, 066109 (June 2016). https://doi.org/10.1117/1.OE.55.6.066109

Abstract

We report more than two octave spanning mid-IR flat-top supercontinuum (SC) generation using all normal A_s2S₅-borosilicate hybrid photonic crystal fiber. Our design is based on a chalcogenide A_s2S₅ photonic crystal fiber (PCF), where the first ring composed of six air holes is made by borosilicate glass. By injecting 50-fs pulses with 1.6 nJ energy at 2.5 μm in the all normal dispersion (ANDi) regime, a flat-top broadband SC extending from 1 to 5 μm with high-spectral flatness of 8 dB is obtained in only 4-mm fiber length. To the best of our knowledge, we present the broadest flat mid-IR spectrum generated in the ANDi regime of an optical fiber. The self-phase modulation and the optical wave breaking are identified as the main broadening mechanisms. The obtained broadband light source can be potentially used in the field of spectroscopy and in high-resolution optical coherent tomography owing to the high-spectral SC flatness generated by our designed fiber.

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Amine Ben Salem, Mbaye Diouf, Rim Cherif, Ahmadou Wague, and Mourad Zghal "Ultraflat-top midinfrared coherent broadband supercontinuum using all normal A_s2S₅-borosilicate hybrid photonic crystal fiber," Optical Engineering 55(6), 066109 (10 June 2016). https://doi.org/10.1117/1.OE.55.6.066109

Published: 10 June 2016

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