- This topic has 12 replies, 4 voices, and was last updated 9 years, 9 months ago by mohammed mostafa.
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January 27, 2015 at 10:24 pm #17343vignesParticipant
Dear 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 #17393Damian MarekParticipant
If 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 #17426vignesParticipant
Dear 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 #17456RavilParticipant
Hi 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 #17489vignesParticipant
Dear 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 #17628Damian MarekParticipant
In 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 #17522RavilParticipant
Hi 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 #17527vignesParticipant
Dear 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 #17591RavilParticipant
Hi 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 #17592RavilParticipant
Since 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 #17633vignesParticipant
dear 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 #17638Damian MarekParticipant
Please 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 #17881mohammed mostafaParticipant
attach the project file, this is better to understand the problem
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