en تخصصي Special پژوهشي Research <p dir="ltr" style="text-align: justify;">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 <em>p</em>-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.</p> Second harmonics, Wagon wheel fiber, Finite element method, LiTaO3. 113 122 http://ijop.ir/browse.php?a_code=A-10-269-2&slc_lang=en&sid=1 Motaharesadat Hosseinian motaharesadat63@gmail.com 10031947532846001962 10031947532846001962 Yes Physics and Photonics Dept., Graduate University of Advanced Technology Ali Reza Ahmadi iran.mahan@gmail.com 10031947532846001963 10031947532846001963 No Physics and Photonics Dept., Graduate University of Advanced Technology Maryam Alvanforoush 10031947532846001964 10031947532846001964 No Physics and Photonics Dept., Graduate University of Advanced Technology Ali Asghar Zakerifar 10031947532846001965 10031947532846001965 No Physics and Photonics Dept., Graduate University of Advanced Technology Mohammad Bolorizadeh mabloor04@yahoo.com 10031947532846001966 10031947532846001966 No Physics and Photonics Dept., Graduate University of Advanced Technology