Hello everyone,
I am preparing to simulate a Fiber To The Home FTTH system. My problem is related to the implementation of multiplexing the upstream from the users (ONUs) using OTDMA. At the OLT, I need to demultiplex these signals using the optical gate to get individual data of each user. How to design the optical gate?. the bit rate is 1.25 Gbps and the number of users is 32.
I am looking forward..
Best regards
At this bitrate you could either add an EAM in the optical path modulated with the gating signal or you could alternatively switch the reverse bias of the photo diode. The EAM could be integrated. Modulating the photo diode's bias voltage might be worth a try if possible within your simulation.
Dear Reinhold
I appreciate your answering. Do you have a paper explain what you had mentioned?
Thank you
You can find a general overview about optical gating inPallavi Singh, Devendra Kr. Tripathi, Shikha Jaiswal, and H. K. Dixit, “All-Optical Logic Gates: Designs, Classification, and Comparison,” Advances in Optical Technologies, vol. 2014, Article ID 275083, 13 pages, 2014
EAMs as optical gates are described in
S. Kodama, T. Ito, N. Watanabe, S. Kondo, H. Takeuchi, H. Ito, and T. Ishibashi, “2.3 picoseconds optical gate monolithically integrating photodiode and electroabsorption modulator,” Electron. Lett. 37(19), 1185–1186 (2001).
You could also use a semiconductor optical amplifier (SOA) for this purpose (to both amplify and switch the signals).
Regards,
Slavisa
You might take a look at the following literature:
http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6210189&tag=1
https://www.researchgate.net/publication/258930578_Design_of_Packet-Switched_Access_Nodes_for_Time-Multiplexed_Photonic_Networks?ev=prf_pub
I hope it can be of some help to you.
Thesis Design of Packet-Switched Access Nodes for Time-Multiplexed ...
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