Supercontinuum generation in silicon nanowire embedded photonic crystal fibers with different core geometries

M. Abobaker Abdosllam; E. Gunasundari; K. Senthilnathan; S. Sivabalan; K. Nakkeeran; P. Ramesh Babu

doi:10.1117/12.2069497

21 August 2014 Supercontinuum generation in silicon nanowire embedded photonic crystal fibers with different core geometries

M. Abobaker Abdosllam, E. Gunasundari, K. Senthilnathan, S. Sivabalan, K. Nakkeeran, P. Ramesh Babu

Author Affiliations +

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, E. Gunasundari, K. Senthilnathan, S. Sivabalan, K. Nakkeeran, and 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); https://doi.org/10.1117/12.2069497

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