With the option pull-down box set to FAR FIELD SETTINGS, the Modal Analysis tab displays the settings used to project near field profiles into the far field.
The following parameters are required:
- PROJECTION METHOD:
- ANGULAR: Projects the near-field into an angular coordinate system using a fully-vectorial, accurate algorithm. For slab waveguides, the far field information is plotted as a function of position. For waveguides with a two dimensional cross-section, it is plotted in polar coordinates.
- PLANAR: Projects the near-field into a Cartesian coordinate system using a fully-vectorial, accurate algorithm.
- MATERIAL INDEX: This field specifies the refractive index through which the far field projection is performed
- Z DISTANCE (only valid for planar projections): This field specifies the distance (in the units specified) to the projection plane
- POINTS IN X, Y (or Z): These fields allow the user to specify the number of points in the projection plane. The larger the number of points, the longer it will take to calculate the far field projection.
- WIDTH, HEIGHT (only valid for planar projections): the physical extent of the far-field plane, measured in the units specified
- X, Y, Z (only valid for planar projections): this specifies the center of the projection plane
- RECENTER: pressing this button will result in recalculation of the far-field projection, centered on the X, Y, Z values specified for the center location
- CALCULATE: this button will calculation of the far-field projection