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Simulation of 1×2 OTDM router employing symmetric Mach-Zehnder switches

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2 Author(s)
Ghassemlooy, Z. ; Sch. of Eng. & Technol., Nothumbria Univ., Newcastle upon Tyne, UK ; Ngah, R.

In high-speed all-optical time division multiplexed (OTDM) routers it is desirable to carry out data routing, switching, clock recovery and synchronisation in the optical domain in order to avoid the bottleneck due to optoelectronics conversion. The authors propose an optical switch based on all-optical symmetric Mach-Zehnder (SMZ) switching and investigate its characteristics. The proposed switch is to be used as a building block for a simple 1×2 OTDM router for asynchronous OTDM packet routing, where clock recovery, address recognition and payload routing are all carried out in the optical domain. Simulation and numerical results demonstrate that clock recovery, address recognition and payload routing are possible with small amounts of crosstalk. Also presented are simulation results for bit error rate (BER) performance for the 1×2 router. For a BER of 10-9 the receiver sensitivity is -26 dB compared with baseline detection without a router of -38 dB. The proposed router displays great potential for use in ultra-high-speed OTDM networks.

Published in:

Circuits, Devices and Systems, IEE Proceedings -  (Volume:152 ,  Issue: 2 )