Learning Forum

[512105003]

Hi,

I have conducted an analysis of my waveguide design using the Mode Solver to achieve a single mode operation, and the results are attached. According to the results, the effective index of Mode 1 is calculated as 1.605514, with TE/TM polarization fractions of 82.1% and 83.17%, respectively. Mode 2, on the other hand, has reached cutoff and does not propagate. I am uncertain about the correct naming for Mode 1—would it be appropriate to label this mode as TM00? Could you please clarify the correct mode designation? Additionally, I would appreciate any explanation regarding the TE polarization fraction and the waveguide TE/TM fraction. 

Huriye

[Guilin Sun]

Somehow my reply was not successul so I reply it again:

TE/TM naming is not unique. and due to different conventions and approximations, the definition can be controvvesal. Silicon photonics or other high-index-contrast waveguides have tight mode confiement. so strict deinition can be challenge. You can define the mode by your self. 

Please visit this post   

Ansys Insight: 有关TE、TM偏振以及模式光源的问题

[512105003]

Hi,

I have designed a 1x2 splitter using the EME solver and attached a screenshot. I'm having trouble determining the appropriate dimensions for the ports. Could you provide guidance on what I should consider when choosing these dimensions? Additionally, I'm unsure about using the "use full simulation span" option. When this option is checked, it seems the ports automatically extend to match the EME simulation region, as shown in the screenshot. However, when I manually set different x-span and z-span values for the port, the resulting S-parameter values change. Is this expected behavior? Also, when using the "use full simulation span" option, the S-parameters (Abs^2 values) for S21 and S31 both yield 0.9834. I'm not entirely sure how accurate or reliable these results are. Could you provide any insight into this? I would greatly appreciate any clarification or best practices on setting port spans to ensure accurate simulation results.

Thank you very much for your assistance!

[Kirill]

Since a new thread has been started: Lumerical EME solver, this thread has been closed.