To draw a micro-ring resonator, first draw a linear waveguide by performing the
following procedures.

Drawing a Linear Waveguide

StepAction
1From the Draw menu, select Linear Waveguide.
2In the layout window, drag the linear waveguide from the start point to the end point.

A linear waveguide appears in the layout window.

Note: Release the Linear Waveguide selection tool by clicking the Select tool after the Linear Waveguide is drawn in the layout.

FDTD - Figure 12 Linear Waveguide

Figure 12: Linear Waveguide

3To adjust the position and the shape of the waveguide, in the layout window, double-click the Linear Waveguide.

The Linear Waveguide Properties dialog box appears.

FDTD - Figure 13 Linear Waveguide Properties dialog box

Figure 13: Linear Waveguide Properties dialog box

4

Click the Start tab and type the following values:

Horizontal offset (µm): 0

Vertical offset (µm): 2.0

Width (µm): 0.5

Depth (µm): 1.0

Label: linear1

Channel Thickness Tapering: Use Default (Channel: None)

5

Click the End tab and type the following values:

Horizontal offset (µm): 8.0

Vertical offset (µm): 2.0

Note:

–    You can also set a variable and even the expression—click Evaluate to see the final value of the expression.

–    Horizontal means the z-direction.

–    Vertical means the x-direction.

– Depth means the y-direction.

6From the Profile list, select Waveguide.

7To save the new values and update the Linear Waveguide, click OK.

The modified Linear Waveguide appears in the new position.

FDTD - Figure 14 Modified Linear Waveguide

Figure 14: Modified Linear Waveguide

Drawing a Ring Waveguide

StepAction
1From the Draw menu, select Ring Waveguide.

2In the layout window, drag the Ring Waveguide from what will be the center, to a point which will be the radius of the outside ring.

FDTD - Figure 15 Ring Waveguide

Figure 15: Ring Waveguide

3To adjust the position and the shape of the Ring Waveguide, in the layout window, double-click the Ring Waveguide.

The Ring Waveguide Properties dialog box appears.

FDTD - Figure 16 Ring Waveguide Properties dialog box 4 Type

Figure 16: Ring Waveguide Properties dialog box

4

Type the following values: Horizontal offset (µm): 4.0

Vertical offset (µm): 0.35

Major radius (µm): 1.8

Minor radius (µm): 1.8

Orientation Angle (degrees): 0

Channel Thickness Tapering: Use Default (Channel: None)

Width (µm): 0.5

Depth (µm): 1.0

Label: Ring1

Note: The Ring Waveguide will be an elliptic ring if the two radii are set to different values.

5From the Profile list, select Waveguide.

6To save the new values and update the Ring Waveguide, click OK.

The modified Ring Waveguide appears in the new position.

FDTD - Figure 17 Modified Ring Waveguide

Figure 17: Modified Ring Waveguide

7click 3D Layout Model button under layout window to observe the design in 3D mode.

FDTD - Figure 18 3D Layout

Figure 18: 3D Layout

Note: In 3D Layout window, left clicking the mouse and moving it can change the view angle. Right clicking and holding the mouse and moving it can change the position. Rolling the mouse can zoom in or out in the 3D layout.