Introduction
OptiMode is a suite of applications dedicated to mode solving. Introduced with the OptiBPM 10 release, OptiMode has a Designer, Simulator, and Analyser application for each of the three stages of the project definition and simulation. Projects in OptiMode can be parameterized and executed in script in the same manner as OptiBPM. This lesson describes…
Defining Materials
To define the materials for the OptiMode 3D Mode Solver, perform the following procedure. Note the Profile Designer has two directories, Master and the default name for the new project. The Master is a storage place only, and does not participate in the project. The materials for this project should be defined under the directory…
Designing the Waveguide
To define the waveguide, perform the following procedure. Step Action 1 In the Initial Properties dialog box, type/select the following: a. Default Waveguide: Width: 3 Profile: RidgeWG b. 3D Wafer Properties Width: 10 c. 3D Wafer Properties (see Figure 4): Cladding Material: Air Thickness: 1.5 Substrate material: Substrate d. Thickness: 3 Figure 4: Selecting 3D…
Parameterizing the Problem
In Figure 1, the thickness of the surrounding film is a variable. In fact the project is to study the effect of the film thickness on the mode. Therefore this project should have a parameter for the film thickness, and the software may change it to other values during simulation. To create a suitable parameter, follow…
Adding a Substrate Layer
The EtchedFilmThickness will be used to define the thickness of the substrate layer. To add the substrate layer to the layout, follow these steps: Step Action 1 Click on the Add Substrate layers button, next to the Waveguide button of Figure 5. Double click on the new item in the list to get the Substrate…
Setting Simulation Parameters
Set the simulation parameters from Solving >> Solver Parameters to get the Solver Parameters dialog box. In the General tab make the following entries Step Action 1 Set Wavelength to 1.15 2 Select the Real Solver 3 Select Straight Waveguide 4 Select Semi-Vector TE for Mode 5 Set Number of Points in Mesh to be 151…
Modifying the Film Thickness
To modify the parameter EtchedFilmThickness, perform the following steps Step Action 1 Go to Solving >> Edit Parameters … to open the Variables and Functions dialog box. 2 Double click the entry “EtchedFilmThickness” in the User Variables list to bring the information into the User Variable declaration panel. 3 Change value in Expression to a…
Automatically Modifying a Parameter by Script
Simulation of a structure with a range of parameter values can be done manually, one simulation at a time. On the other hand, it is sometimes more convenient to have the software scan parameters automatically, and use the Analyzer to collect all the information. In order to change the parameter by script, copy the following script…