Lasers, Fiber Optics, and Communications

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

[+] Author Affiliations
Amine Ben Salem, Rim Cherif

University of Carthage, Engineering School of Communication of Tunis (Sup’Com), GRES’COM Laboratory, Ghazala, Technopark, Ariana 2083, Tunisia

Mbaye Diouf

University of Carthage, Engineering School of Communication of Tunis (Sup’Com), GRES’COM Laboratory, Ghazala, Technopark, Ariana 2083, Tunisia

University of Cheikh Anta Diop, Department of Physics, Laboratoire Atome-Laser, P.O. Box 5005, Dakar, Senegal

Ahmadou Wague

University of Cheikh Anta Diop, Department of Physics, Laboratoire Atome-Laser, P.O. Box 5005, Dakar, Senegal

Mourad Zghal

University of Carthage, Engineering School of Communication of Tunis (Sup’Com), GRES’COM Laboratory, Ghazala, Technopark, Ariana 2083, Tunisia

Institut Mines-Télécom/Télécom SudParis, 9 rue Charles Fourier, Evry 91011, France

Opt. Eng. 55(6), 066109 (Jun 10, 2016). doi:10.1117/1.OE.55.6.066109
History: Received March 12, 2016; Accepted May 23, 2016
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Abstract.  We report more than two octave spanning mid-IR flat-top supercontinuum (SC) generation using all normal As2S5-borosilicate hybrid photonic crystal fiber. Our design is based on a chalcogenide As2S5 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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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Amine Ben Salem ; Mbaye Diouf ; Rim Cherif ; Ahmadou Wague and Mourad Zghal
"Ultraflat-top midinfrared coherent broadband supercontinuum using all normal As2S5-borosilicate hybrid photonic crystal fiber", Opt. Eng. 55(6), 066109 (Jun 10, 2016). ; http://dx.doi.org/10.1117/1.OE.55.6.066109


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