کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9786244 | 1512668 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Approximate analysis of circular bends in nonlinear planar waveguides
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Approximate analysis of circular bends in nonlinear planar waveguides Approximate analysis of circular bends in nonlinear planar waveguides](/preview/png/9786244.png)
چکیده انگلیسی
The modal properties of a bent planar waveguide with a nonlinear core and cladding are investigated. We assume weak nonlinearity: the self-induced refractive index change is small compared to the difference of refractive index at the core-cladding interface. We develop a first-order perturbation theory to describe the effects of the bend and weak nonlinearity, giving rise to a set of coupled equations for the modal fields. We give exact solutions to the resultant perturbation equations for the modal field in terms of Mathieu functions of fractional order. We identify a narrow region of power for which bound modes exist but have no linear equivalent. We also employ a Gaussian approximation and find that it provides simple and accurate analytic expressions for the modal parameters such as, field distribution, correction to the propagation constant and the induced shift of the field.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 244, Issues 1â6, 3 January 2005, Pages 399-409
Journal: Optics Communications - Volume 244, Issues 1â6, 3 January 2005, Pages 399-409
نویسندگان
Z. Jovanoski, I.N. Towers, N.A. Ansari, R.A. Sammut,