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Creation of miniature optical delay lines and buffers is one of the greatest challenges of the modern photonics which can revolutionize optical communications and computing. Several remarkable designs of slow light optical delay lines employing coupled ring resonators and photonic crystal waveguides has been suggested and experimentally demonstrated. However, the insertion loss of these devices is...
Recent advances in the theoretical and experimental studies of Ge/SiGe quantum wells structures will be presented with a focus on optical telecommunication applications. Firstly, high-speed stand-alone Ge/SiGe QW electro-absorption modulators and photodetectors will be reported. It will be followed by the presentation of different methods for engineering Ge/SiGe QW to tune the operating wavelength...
Optical wireless network has the potential to serve both data centers and metropolitan area networks. Free space optical networks has one dimension that is not encountered in fiber networks and that is its ability to reconfigure its connection topology by beam steering in time scale of at least mS if not µS. This paper describes a cognitive technique for the fast estimation of traffic changes and...
We address the potential of a system with gain and loss featuring a PT-symmetric configuration for the realization of tunable, reconfigurable and non-reciprocal devices. By using PT-symmetric coupled waveguides and Bragg reflectors as fundamental building blocks, it is possible to build a wide variety of functional optical devices such as switches, unidirectional Bragg gratings, reconfigurable modal...
In this paper, we propose a large-scale transparent optical datacentre network with a coordinated congestion management technique, combining optical Fibre Delay Line (FDL) buffering and novel packet retransmission schemes. Two different retransmission mechanisms are investigated: Random Retransmission (RR) and a novel scheme called Pre-Reservation Retransmission (PRR). To examine the efficacy of the...
Performance analysis of an opto-electronic packet switch using combined SDM and WDM are presented. The simulations consider a switch connected to 7-core fibers. We point out the benefits of this configuration in various traffic distributions in terms of sustainable load, latency and energy savings for several packet classes.
The future of Internet depends on meeting ever-increasing capacity needs while curbing the energy consumption's uncontrolled growth in data networks, especially in switching. Optics has a tremendous potential to solve these challenges, but the lack of practical optical buffers leaves optical packet switches vulnerable to contention, hindering their use even at moderate network loads. Recent developments...
We present a novel optical add-drop multiplexer for next-generation metro/access networks by exploiting optical label switching technology. Experimental results of a ring network show nanoseconds add/drop operation including multicasting and power equalization of 50Gb/s data.
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