Lesson 7: Applying Predefined Diffusion Processes
Creating a Linear Waveguide Formed by the Titanium Diffusion in Lithium Niobate
To create a linear waveguide formed by the Titanium Diffusion in Lithium Niobate, perform the following procedure. Step Action 1 Create the following dielectric material (see Figure 1): Name: Cladding Refractive index (Re:): 1 Figure 1: Profile Designer — Cladding 2 Create the following diffusion material (see Figure 2): Name: LN1 Figure 2: Profile Designer —…
Defining Layout Settings
To define the layout settings, perform the following procedure. Step Action 1 Type the following settings. a. Waveguide Properties: Width: 6 Profile: Ti:LiNb03_1 b. Wafer Dimensions: Length: 60 Width: 20 c. 2D Wafer Properties: Material: LN1 d. 3D Wafer Properties Cladding Material: Cladding Thickness: 2 Substrate Material: LN1 Thickness: 10 2 To apply the settings…
Setting Simulation Parameters
Since we don’t want to calculate the mode in the calculation, we will use the average reference refractive index. The wavelength of the simulation is set to 1.55 microns in the Global Data window. The number of mesh points is set to 151 by 151, and a scalar propagation engine is selected. The 3D Isotropic window…
Running the Simulation
To run the simulation, perform the following procedure: Step Action 1 From the Simulation menu, select Calculate 3D Isotropic Calculation. The Simulation Parameters dialog box appears. 2 Click the 3D Isotropic tab and ensure that the following settings are selected (see Figure 7): Polarization: None(Scalar) Number of points: 151 x 151 View cut: X Mesh Pt:…
Adding a New Profile
To add a new profile to the Profile Designer, perform the following procedure. Step Action 1 Double-click on the waveguide in the layout window. The Linear Waveguide Properties dialog box appears. 2 Click Profiles in Use. The Profile Designer opens. 3 Right-click on Diffusion profile Mg:LiNbO3 and create a new profile: Name: Mg:LiNbO3_1 Stripe thickness…
