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Under the modal analysis tab, there is the option to analyze the modes of a bent waveguide for user defined radius of curvature and bend orientation. The results are those of a doughnut shaped waveguide and can be incorporated in the analysis of a bent waveguide. In this example, losses in a waveguide with one 90
Bend losses are propagation losses in optical fibers (or other waveguides) caused by bending. They tend to be particularly strong in large mode area fibers.
FIMMWAVE can calculate the bend modes of a planar SOI waveguide in a rigorous way. The FMM Solver used as a bend mode solver relies on fully cylindrical coordinates. Bend losses were calculated with true transparent boundary conditions, which provide more stable and accurate results than PMLs (Perfectly Matching
12, No. 4 / April 1987. Accurate numerical method for the calculation of bending loss in optical waveguides using a matrix approach. K. Thyagarajan, M. R. Shenoy, and A. K. Ghatak. Department of Physics, Indian Institute of Technology, New Delhi 110016, India. Received September 17, 1986; accepted December 29, 1986.
When using waveguide bends and waveguide twists, it is necessary to ensure the bending and twisting is accomplished in the correct manner otherwise the electric and magnetic fields will be unduly distorted and the signal will not propagate in the manner required causing loss and reflections. Accordingly waveguide bend
Abstract—In this letter, we present a different approach to ac- curately calculate the bending losses in curved dielectric waveg- uides. It is based on the well-known conformal transformation of the index profile and on vectorial eigenmode expansion, but this time with perfectly matched layer (PML) boundary conditions to.
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Because of the otherwise promising properties of polymer waveguides, a practical way to reduce their bend losses is highly desirable. Several mechanisms contribute to losses in waveguide bends: straight-to-bend and bend-to- bend mode transition losses, propagation losses, and losses due to radiation into the substrate.
5 Jun 2017 Dear Lumerical staff, I have a question on waveguide bending loss calculation. First, I have a deep etched InP waveguide cross-section with bend mode profile calculated in MODE solution. mode.lms (308.6 KB) 1. I
Abstract—This paper details an accurate method for computa- tion of bending losses in rectangular optical waveguides which we combine with perturbation theory to account for the fields in the. (outer) corner regions of the guiding channel. In the case of the weakly guiding channels of interest in optical signal processing,.
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