- This topic has 12 replies, 4 voices, and was last updated 10 years ago by
mohammed mostafa.
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January 27, 2015 at 10:24 pm #17343
vignes
ParticipantDear team,
I am trying fr mode coupling in three core fiber. I have designed in linear waveguide and refractive index value is uniform to other region. Could we achieve if so what modifications I need to take care. -
February 2, 2015 at 9:33 am #17393
Damian Marek
ParticipantIf your cores are identical, I think the most important parameter to change is the distance between cores. Larger distances will keep the modes confined to their respective cores, while bringing the cores closer will increase the coupling effect between the modes.
Regards
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February 3, 2015 at 10:47 pm #17426
vignes
ParticipantDear Damian
I got that mode couple in visual but I want find the wavelength or effective mode index at which mode coupling takes place
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February 5, 2015 at 2:49 am #17456
Ravil
ParticipantHi Vignes,
In my opinion you should be able to calculate the the effective mode index from your waveguide and regime parameters.
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February 5, 2015 at 7:30 pm #17489
vignes
ParticipantDear ravil,
I found effective mode index ,all values get changing for the certain wavelength range.but no coupling takes place
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February 18, 2015 at 10:18 am #17628
Damian Marek
ParticipantIn your design are you permitted to change the distance from core-core? Or can you only change the materials and wavelength?
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February 8, 2015 at 5:14 pm #17522
Ravil
ParticipantHi Vignes,
I see your point. Are you using planar or cylindrical waveguide? The field distribution and coupling is symmetric only in the 2nd case.
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February 8, 2015 at 11:33 pm #17527
vignes
ParticipantDear ravil,
I am using planar waveguide. How could? And I varied wavelength range from 1.2 to 1.6um
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February 17, 2015 at 2:18 pm #17591
Ravil
ParticipantHi Vignes, in my opinion, the penetration depth is inverse proportional to the wavelength. At the same time, you should consider condition of critical coupling.
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February 17, 2015 at 2:20 pm #17592
Ravil
ParticipantSince the range you gave is very large, I’d recommend you to double check field distribution (with its components) as well as penetration depth and coupling distance.
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February 18, 2015 at 10:39 am #17633
vignes
Participantdear damain,
i choose same refractive index values for all the three core and varying the wavelength only
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February 18, 2015 at 11:46 am #17638
Damian Marek
ParticipantPlease attach you project file, this should be fairly straight forward unless I am missing something!
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February 27, 2015 at 1:31 am #17881
mohammed mostafa
Participantattach the project file, this is better to understand the problem
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