Show the modal field and the waveguide geometry

[musabtr1Participant]

Dear all,

Would you please help me to show both of the model field ( Amplitude or intensity ) and waveguide geometry in the one graph for mode solver. I want to see the percentage of confinement for the beam inside the Waveguide.

[Damian MarekParticipant]

One possible way would be to export the fields and refractive index profile to a program like MATLAB. In the OptiMODE Analyzer application you can right click the modes and refractive index profiles for this option.

Regards

[Dr. MohammadMahdi AriannejadParticipant]

is there anyway to do it straight ahead with BPM?

[Damian MarekParticipant]

Sure, you can use the Additional Output Data window in the Simulation tab to calculate confinement factor of the field with respect to the waveguide boundaries or fundamental mode.

Cheers

[Dr. MohammadMahdi AriannejadParticipant]

would you please let me know more in detail? I totally confuse? which step I need to follow?

[Damian MarekParticipant]

This tutorial covers the basics of monitoring the power along a path. Note: This will result in performing the calculation along the path.

http://optiwave.com/category/optibpm-manuals/optibpm-tutorials/g-lesson-5-wavelength-scripting-with-vb-script/

Let me know if that is clear enough!

[musabtr1Participant]

Damian Mark,

right now, I’m using mode solver. can I measure polarization and group index for my Design.

+1

[Damian MarekParticipant]

Hi,

The mode solver will give the different components of the field as well as a description of the type of mode TE/TM or depending on the mode solver it might give the EH/HE fiber mode titles as well.

The mode solver solves for the mode index/effective index, whereas the group index is related to the group velocity. You can calculate it by running a sweep of the wavelength and finding it from the slope of the mode index.

Cheers!

[musabtr1Participant]

Thanks a lot Damian,

I am trying to solve a set of waveguide dimensions, is there any possible way to involve the polarization effect in the group index.

[Damian MarekParticipant]

Hi,

Yes the effective index will be given for different modes of the waveguide, the different polarizations I mentioned above. Two modes with different polarizations will probably have different effective indices (if the waveguide is asymmetrical) and then you can plot these as a function of wavelength and extract the different group indices from there.

Regards,
Damian