[Yousef FazeaParticipant]

Thank you all for your prompt response

My scope is Direct-Detect System (LAN). So i have developed successfully WDM-MDM system but to prove this claim i have to compare my results with standardized WDM or at least WDM with a year 2014 or 2015. Your kind help is appreciated

[Yousef FazeaParticipant]

Thank you very much, Mr. Damian

[Yousef FazeaParticipant]

Thank you very much Mr. Damian for your prompt responses. It seems that I failed to draw a complete picture regarding my previous question, and I apologize for that.

If I design a new MMF, of course the power coupling coefficient will differ compared to the ready MMF component, because as you kindly stated that each fiber support different modes. However, and this is my question, if i repeat the same scenario again on the “newly designed MMF” whereby if I excite 2 modes (LG00 and LG01) then I did the following:

-First run will divide the power ratio between those two modes equally as (0.5 0.5) and record the power coupling coefficient.
-Second run will divide the power ratio between them, but this time unequally as (0.7 0.3) and record the power coupling coefficient.

Will I have again the same power coupling coefficient or Not?

Much appreciation in advance for your efforts.

[Yousef FazeaParticipant]

Thank you very much, Mr. Damian and Mr. Sushank

Will designing a new Multimode fiber will help to have a different power coupling coefficient at the MMF.

[Yousef FazeaParticipant]

Hello Mr Abdullah and all

The important question is , if you divide the power ratio between those three modes at first equally (0.33 0.33 0.33), will you get a different power coupling coefficient as if you divide the power ratio between those three modes unequally (0.8 0.1 0.1) or (0.6 0.3 0.1?

The answer is No and please verify that, no matter if you change the three modes power ratio, the power coupling coefficient values always the same?

Here i would like to ask you and Mr. Damian, why is that happening?

[Yousef FazeaParticipant]

Hello there,

I was about to ask this question to the forum since optisystem only can support HG and LG modes. but i will give you a hint and hofully the technicals here can support.

Usually researcher use “modes conversion along with spiral phase plates and SLM”

Please if you got a detailed answer, email me( yosiffz@internetworks.my)

[Yousef FazeaParticipant]

Hello there,

Your question is not quite clear. If I may understand you correctly, since you will use MMF so I guess you need it for short distances but the question is, for How long?

Generally speaking, and in the scope of short distance MMF, excitation of many nodes doesn’t necessarily produce a significant result due to modal dispersion. Though modes consider as a big advantage that was able to exploit the utilization of wavelength and transmit the data in apparel streams.Howeve, they considered as the biggest disadvantage due to the mode coupling which cause pulse broadening result of distance limitation and increasing BER.

Suggestion
———–
Use any selective mode excitation techniques along with any type of mode’s compensation either (optical or electronic)

Regards