TY - GEN
T1 - Supercontinuum Generation in Silicon Nanowire Embedded Photonic Crystal Fibers with Different Core Geometries
AU - Abobaker, Abdosllam M.
AU - Gunasundari, E.
AU - Senthilnathan, K.
AU - Sivabalan, S.
AU - Nakkeeran, Kaliyaperumal
AU - Rameshbabu, P.
PY - 2014
Y1 - 2014
N2 - 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 mu m. The proposed structure exhibits almost flat GVD (0.8 to 1.2 mu m wavelength), zero GVD (approximate to 1.31 mu m) and small TOD (0.00069 ps(3)/m) at 1.1 mu m wavelength and high nonlinearity (2916 W-1 m(-1)) at 0.8 mu m 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 mu m 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.
AB - 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 mu m. The proposed structure exhibits almost flat GVD (0.8 to 1.2 mu m wavelength), zero GVD (approximate to 1.31 mu m) and small TOD (0.00069 ps(3)/m) at 1.1 mu m wavelength and high nonlinearity (2916 W-1 m(-1)) at 0.8 mu m 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 mu m 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.
KW - Silicon nanowire embedded photonic crystal fiber
KW - finite element method
KW - waveguide dispersion
KW - effective nonlinearity and supercontinuum generation
KW - optical coherence tomography
KW - continuum generation
KW - wave-guides
KW - dispersion
KW - spectroscopy
U2 - 10.1117/12.2069497
DO - 10.1117/12.2069497
M3 - Published conference contribution
T3 - Proceedings of SPIE
BT - International Symposium on Photonics and Optoelectronics 2014
A2 - Zhou, Z
PB - SPIE - INT SOC OPTICAL ENGINEERING
T2 - International Symposium on Photonics and Optoelectronics
Y2 - 22 August 2014 through 24 August 2014
ER -