As in every project, we start with creating materials of the wafer. Assume Lithium Niobate substrate and air cladding:
| Step | Action |
| 1 | From the File menu, select New.
The Initial Properties dialog box appears. |
| 2 | Click Profiles And Materials.
The Profile Designer opens. |
| 3 | Under OptiBPM Designer 1, in the Materials folder, right-click the Dielectric folder and select New.
The Dielectric1 dialog box appears. |
| 4 | Create the following dielectric material :
Name: air Refractive index (Re:): 1 |
| 5 | Click Store.
The Dielectric material air is saved in the Materials folder. |
| 6 | Under OptiBPM Designer 1, in the Materials folder, right-click the Diffused folder and select New.
The Diffused1 dialog box appears. |
| 7 | Create the following dielectric material :
Name: Lithium niobate_1 |
| 8 | Click Store.
The Diffused material Lithium niobate_1 is saved in the Materials folder. |
Creating the reference profile
While in Profile Designer, create a new Ti:LiNb03 (default) profile. This new predefined profile will serve as a reference, and will be used for comparison with the user defined profile we are going to design.
| Step | Action |
| 1 | Under OptiBPM Designer 1, right-click the Diffusion-Ti:LiNb03 folder, and select New. |
| 2 | Type the following Profile name:
Ti:LiNb03 Profile |
| 3 | Use the following (default) values: Lateral diffusion length:Â 4.0
Diffusion length in depth:Â 3.5 |
| 4 | Click Store. |
| 5 | Close the Profile Designer. |
Defining the layout settings
Coming back to the layout designer setup the layout settings as follows:
| Step | Action |
| 1 | Type/select the following:
Waveguide Properties Width (μm): 4.0 Profile: Ti:LiNb03 Profile Wafer Dimensions Length (μm): 100 Width (μm): 30 2D Wafer Properties Material: Lithium niobate_1 3D Wafer Properties Cladding Material: air Thickness: 3 Substrate Material: Lithium niobate_1 Thickness: 8 |
| 2 | To apply the settings to the layout, click OK.
The layout window appears. |