Mode Solving Arbitrary Waveguides
When solving an isotropic waveguide in OptiMode there are two main numerical methods (excluding fibers) for calculating the modes, the Alternating Direction Implicit and the Implicitly Restarted Arnoldi Method mode solvers. Could you explain the advantages and disadvantages of both?
Furthermore, when solving a waveguide with a large core I found that the ADI method would calculate results slightly differently for various starting fields.
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