What are the main challenges of Mode Division Multiplexing in optical communication systems?
What are the main challenges of Mode Division Multiplexing in optical communication systems?
Homework Answers
The limitation of using mode division multiplexing in optical communication systems is mode dispersion and the receiver complexity.There are many related books and papers referring to this problem.But there are a lot of challenges that are to be dealt with before this becomes commercial; this includes difficulties in splicing multicore fibers, maintaining the correct rotation orientation, developing spatial multiplexers and fiber amplifiers, providing sufficient gain uniformity over different modes, etc.
One of the problems with realization of transmission over FMF is that these fiber have high modal dispersion. This results a high number of equalization taps number which might make long haul transmission using FMFs impractical due to the requirement DSP complexity. And the second chanllenges is the MDL in MDM systems, which may result performance degradation or even capacity outage.
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What are the main challenges of Mode Division Multiplexing in
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