21 August 2014 Supercontinuum generation in silicon nanowire embedded photonic crystal fibers with different core geometries
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Proceedings Volume 9233, International Symposium on Photonics and Optoelectronics 2014; 923319 (2014) https://doi.org/10.1117/12.2069497
Event: International Symposium on Photonics and Optoelectronics (SOPO 2014), 2014, Suzhou, China
Abstract
We design various silicon nanowire embedded photonic crystal fibers (SN-PCFs) with different core geometries, namely, circular, rectangular and elliptical using finite element method. Further, we study the optical properties such as group velocity dispersion (GVD), third order dispersion (TOD) of x and y-polarized modes and effective nonlinearity for a wavelength range from 0.8 to 1.6 μm. The proposed structure exhibits almost flat GVD (0.8 to 1.2 μm wavelength), zero GVD (≈ 1.31 μm) and small TOD (0.00069 ps3/m) at 1.1 μm wavelength and high nonlinearity (2916 W-1m-1) at 0.8 μm wavelength for a 300 nm core diameter of circular core SN-PCF. Besides, we have been able to demonstrate the supercontinuum for the different core geometries at 1.3 μm wavelength with a less input power of 25 W for the input pulse of 20 fs. The numerical simulation results reveal that the proposed circular core SN-PCF could generate the supercontinuum of wider bandwidth (900 nm) compared to that from rest of the geometries. This enhanced bandwidth turns out to be a boon for optical coherence tomography (OCT) system.
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M. Abobaker Abdosllam, M. Abobaker Abdosllam, E. Gunasundari, E. Gunasundari, K. Senthilnathan, K. Senthilnathan, S. Sivabalan, S. Sivabalan, K. Nakkeeran, K. Nakkeeran, P. Ramesh Babu, P. Ramesh Babu, } "Supercontinuum generation in silicon nanowire embedded photonic crystal fibers with different core geometries", Proc. SPIE 9233, International Symposium on Photonics and Optoelectronics 2014, 923319 (21 August 2014); doi: 10.1117/12.2069497; https://doi.org/10.1117/12.2069497
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