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

A. Baili; R. Cherif; T. S. Saini; A. Kumar; R. K. Sinha; M. Zghal

doi:10.1117/12.2061848

5 September 2014 2-10 μm supercontinuum broadening using a highly nonlinear chalcogenide microfiber for mid-IR applications

A. Baili, R. Cherif, T. S. Saini, A. Kumar, R. K. Sinha, M. Zghal

Author Affiliations +

Proceedings Volume 9200, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications VIII; 92000S (2014) https://doi.org/10.1117/12.2061848
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

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.

Citation Download Citation

A. Baili, R. Cherif, T. S. Saini, A. Kumar, R. K. Sinha, and M. Zghal "2-10 μm supercontinuum broadening using a highly nonlinear chalcogenide microfiber for mid-IR applications", Proc. SPIE 9200, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications VIII, 92000S (5 September 2014); https://doi.org/10.1117/12.2061848

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