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Simulation of simultaneous all optical clock extraction and demultiplexing for OTDM packet signal using a SMZ switch

Ngah, Razali and Ghassemlooy, Zabih (2004) Simulation of simultaneous all optical clock extraction and demultiplexing for OTDM packet signal using a SMZ switch. In: 9th European Conference on Networks and Optical Communications (NOC 2004), Technical University of Eindhoven, Netherland, 2004.

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Abstract

In this paper we report the simulation results of simultaneous all optical clock extraction and demultiplexing from 4x10 GHz asynchronous optical time division multiplexed (OTDM) packet signals using a single symmetric Mach-Zehnder (SMZ) switch. In high-speed OTDM systems clock recovery, the address recognition and the payload routing are all should be carried out in the optical domain in order to avoid the bottleneck due to the optoelectronics conversion. Simulation results demonstrate that clock recovery, and payload demultiplexing is possible with high on-off ratio. Bit error rate performance shows that penalty free is achieved for 40-10Gb/s all-optical demultiplexing. With ever-increasing amount of data traffic over the existing network due to the recent advancements in multimedia computing and communication technologies, the need for switching and routing data in all optical domain is increasingly becoming important. All-optical packet switching overcomes the speed bottleneck due to electronics and potentially offering larger capacity, increased flexibility and format transparency, and low cost in the long run [1-2]. In packet-switched OTDM networks, there is a need for clock and address extraction from the payload at the network node level. The recovery of the clock signal for synchronization will determine the performance of ultra-fast OTDM networks. For asynchronous packet-switched networks, synchronization can be achieved by sending at least one optical clock pulse with every OTDM packet transmitted. Self-synchronization schemes are attractive for optical packet networks because of reduced hardware cost and control complexity [3], and only require a single pulse in the first bit position of the packet that corresponds to the clock pulse. The clock signal could be at different wavelengths [4], polarizations [5], bit rates [6], or intensities [7] in relation to the remaining signals in the packets. Clock extraction schemes using all-optical switches have been extensively investigated for the implementation of self-synchronization schemes [8][9][12]. All optical switches based on cross-phase modulation (XPM) in conjunction with interferometric arrangement are now well founded, offering efficient switching using low control pulses energy compared with the passive devices [9]. Among various interferometer based switch configurations, the SMZ structure provide the most flexibility, shortest switching window, compact size, thermal stability and low-power operation. A single SMZ switch with electro-optic feedback loop has been employed for simultaneous all-optical clock

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:OTDM packet networks, SMZ switch
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:20446
Deposited By: Mrs Liza Porijo
Deposited On:27 Aug 2017 02:11
Last Modified:27 Aug 2017 02:11

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