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Proceedings Paper

2-10 µm supercontinuum broadening using a highly nonlinear chalcogenide microfiber for mid-IR applications
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Paper Abstract

A new design of the As2Se3 microfiber has been presented. With the optimized geometric parameters: pitch Λ= 0.8 μm and five different air filling ratios varying from 0.4 to 0.95, the structure exhibits an all normal dispersion with a flat top equal to -2.3 [ps/(nm.km)], a confinement loss less than 10-2 dB/km, and a large nonlinear coefficient equal to 7250 (w. km)-1. Using the generalized nonlinear Schrödinger equation, we generate a very broadband supercontinuum (SC) in the mid-infrared region. By pumping the fiber at λp=5.24 μm with a femtosecond laser having 50 fs as a width with a relatively low energy of E=80 pJ, we generate a large spectrum extending from 2 μm to 10 μm in only 2 mm fiber length. The generated SC demonstrates perfect coherence property over the entire bandwidth. SC generation extended into the mid-infrared (IR) spectral region have potential usefulness in a variety of applications requiring a broad mid-IR spectrum such as fiber sensing, IR spectroscopy, fiber laser, optical tomography coherence.

Paper Details

Date Published: 5 September 2014
PDF: 6 pages
Proc. SPIE 9200, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications VIII, 92000S (5 September 2014); doi: 10.1117/12.2061848
Show Author Affiliations
A. Baili, Sup'Com, Univ. of Carthage (Tunisia)
R. Cherif, Sup'Com, Univ. of Carthage (Tunisia)
T. S. Saini, Delhi Technological Univ. (India)
A. Kumar, Delhi Technological Univ. (India)
R. K. Sinha, Delhi Technological Univ. (India)
M. Zghal, Sup'Com, Univ. of Carthage (Tunisia)


Published in SPIE Proceedings Vol. 9200:
Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications VIII
Shizhuo Yin; Ruyan Guo, Editor(s)

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