Showing 3 results for Finite Element Method
S.s. Mishra, Vinod Kumar Singh,
Volume 5, Issue 2 (7-2011)
Abstract
A novel design of Dual-Core Photonic Crystal Fiber (DC-PCF) with silica-air microstructures is proposed in this paper. Nonlinearity and confinement loss of DC-PCF are evaluated by using a Full-Vectorial Finite Element Method (FV-FEM) successfully. By optimizing the geometry of three ring DC-PCFs, a high nonlinearity (52w-1km-1) and low confinement loss (0.001dB/km) can be achieved at 1.55μm wavelength when diameter to pitch ratio (d/Λ) is 0.70.
Mr. Farshid Koohi-Kamali, Dr. Majid Ebnali-Heidari, Mohammad Kazem Moravvej-Farshi,
Volume 6, Issue 2 (10-2012)
Abstract
We report the results of our study on the role of microfluidic infiltration technique in improving the coupling characteristics of dual-core photonic crystal fiber (PCF) couplers. Using the finite element method (FEM), we evaluate the effective mode area, dispersion and coupling parameters of an infiltrated dual-core PCF. We use these parameters to design a compact and reconfigurable coupler by solving a set of coupled generalized nonlinear Schrödinger equations. This approach allows one to obtain wavelength-flattened dispersion characteristics with bandwidth of in the ITU region, and large walk-off length simply by choosing a suitable infiltrated refractive index. We also demonstrate that under certain conditions one can observe a pulse break-up effect to generate pulse trains with high repetition rate.
Motaharesadat Hosseinian, Ali Reza Ahmadi, Maryam Alvanforoush, Ali Asghar Zakerifar, Mohammad Bolorizadeh,
Volume 11, Issue 2 (8-2017)
Abstract
The nonlinear effects of the second harmonic generation have been investigated for the propagation of light along the axis of fibers of wagon wheel cross sectional shape. Nodal finite element formulation is utilized to obtain discretized Helmholtz equations under appropriate boundary conditions. The hierarchical p-version nodal elements are used for meshing the cross section of wagon wheel fiber. The fiber material has been chosen to be LiTaO3 to provide proper second harmonic generation. Propagation of generated second harmonics for two incident field amplitudes are studied in this work.
