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Damian Marek
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Hi,

FCC code, I believe will have overlapping spectral content because of the choice of weighting and code length. I found two papers that I think can help you out changing the fiber gratings.

1. http://www.copl.ulaval.ca/fileadmin/copl/documents/documents/Publications-PDF/Rusch/journ56.pdf

Gives a great overview of SAC-OCDMA

2. http://www.sciencedirect.com/science/article/pii/S1877705813001744

You will need access for this paper but it explained the coding of FCC.

If you want to make a 3 user system I think it will simply amount to removing 1 grating on the transceiver side and you will have to choose the the remaining grating’s parameters to coincide with FCC.

Regards

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