Creating an MMI Coupler

To create an MMI coupler, perform the following procedure.

Figure 5: Drawing the first linear waveguide

3	To edit the waveguide, from the Edit menu, select Properties or Double-click the waveguide. The Linear Waveguide Properties dialog box appears (Figure 6).

Figure 6: Linear Waveguide Properties dialog box

4	Click the Start tab.
5	Under Offset, type the following values (see Figure 7): Horizontal: 0 Vertical: 0

Figure 7: Start offset values — first waveguide

Figure 8: End offset values — first waveguide

8	To apply the settings, click OK. The position and the size of the linear waveguide change according to the settings that you selected (see Figure 9).

Figure 9: Modified linear waveguide — first

9	To draw the second waveguide, in the layout window, click beside the first waveguide, drag the second waveguide towards the right side of the layout window, and release (see Figure 10).

Figure 10: Drawing the second linear waveguide

10	To edit the second waveguide, from the Edit menu, select Properties. The Linear Waveguide Properties dialog box appears.
11	Click the Start tab.
12	Under Offset, type the following values (see Figure 11): Horizontal: 200 Vertical: 0

Figure 11: Start offset values — second waveguide

13	Click the End tab.
14	Under Offset, type the following values (see Figure 12): Horizontal: 5300 Vertical: 0

Figure 12: End offset values — second waveguide

15	Type the following value: Width: 48
16	To apply the settings, click OK.
17	The position and the size of the second linear waveguide change according to the settings that you selected (see Figure 13).

Figure 13: Modified linear waveguide — second