- This topic has 9 replies, 5 voices, and was last updated 8 years, 6 months ago by
mohammed mostafa.
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February 3, 2015 at 6:52 am #17415
John
ParticipantHi everybody! basic question: model test structure – very wide waveguide with high delta n. Standard cladding n_clad=1.48. OptiMode_Solver finds modes for the core index up to n_core=1.7. However, somehow it does not find mode for n_core=1.8 or higher (same structure). What do I miss?
Thanks!
John -
February 3, 2015 at 9:18 am #17419
Damian Marek
ParticipantHi John,
Can you attach the OptiMode file you are using? From a guess I would say you might need to increase the mesh resolution if the field is strongly confined to the core.
Regards
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February 3, 2015 at 11:36 am #17424
John
ParticipantHi Damian,
File is attached. I did try to increase mesh resolution – no help at all… It finds modes in 2D but not in 3D. everything is OK if n<=1.7
Best!
John
Attachments:
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February 4, 2015 at 9:23 pm #17449
John
ParticipantHi Damian,
Any insights?
John-
February 6, 2015 at 1:38 pm #17495
Damian Marek
ParticipantHey John,
I can’t say exactly why your file was not working, it gave me a memory warning when I tried to run it! I rebuilt it in both OptiMode and OptiBPM and it works fine. Attached is the BPM file, if you don’t have the same version I would say just try rebuilding the file from scratch. I only needed a mesh of 200×200 to find modes in the n = 1.8 case.
Regards
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February 5, 2015 at 2:37 am #17454
Ravil
ParticipantHi John,
As I can understand, you are using OptiBPM. Did you model your experiment somewhere else?
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February 5, 2015 at 11:15 am #17481
John
ParticipantHi Ravil,
I am working on a more complex model for FDTD for propagation studies in high contrast waveguides.
John -
February 8, 2015 at 5:04 pm #17521
Ravil
ParticipantHi John,
Unfortunately I don’t have a lot of experience with FDTD, but I’ve got the same results as Damian -
February 26, 2015 at 9:39 pm #17872
Dr. MohammadMahdi Ariannejad
ParticipantI think I have the same problem, I was suspicious about my computer because windows 8.1 some of the times this error will happened
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February 27, 2015 at 2:50 am #17885
mohammed mostafa
ParticipantI haven’t alot of experience with FDTD , i think if you attach the project it may be better
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