Dimitris Tsiokos

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We report on the development of a flexible 2D optical fiber-based pressure sensing surface suitable for biomedical applications. The sensor comprises of highly-sensitive Fiber Bragg Grating elements embedded in a thin polymer sheet to form a 2x2 cm(2) sensing pad with a minimal thickness of 2.5mm, while it is easily expandable in order to be used as a(More)
The 60 GHz millimeter-wave band remains the only unlicensed, high-capacity spectral zone which is however limited to Personal Area Networks due to its picocellular nature. Facilitating mm-wave communication onto Radio-over-Fiber infrastructures alleviates the picocellular range handicap while it offers multi-Gbps wireless connectivity. In light of the above(More)
© 2012 Kanellos et al., licensee InTech. This is an open access chapter distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Fiber Optic–Based Pressure Sensing Surface(More)
We present a novel client-weighted mediumtransparent medium access control (CW-MT-MAC) protocol with enhanced fairness service delivery properties accompanied by a low-loss remote access unit (RAU) architecture for use in indoor, Gbps-capable, 60 GHz radio-over-fiber (RoF) wireless local area networks (WLANs). Our approach relies on incorporating a(More)
We present and evaluate a compact, all-optical Clock and Data Recovery (CDR) circuit based on integrated Mach Zehnder interferometric switches. Successful operation for short packet-mode traffic of variable length and phase alignment is demonstrated. The acquired clock signal rises within 2 bits and decays within 15 bits, irrespective of packet length and(More)
We demonstrate an all-optical, self-synchronization scheme for optical packet switched network nodes. It provides both the packet clock signal and the packet beginning, marker pulse. The circuit uses two hybridly integrated MZI switches and has been evaluated with synchronous, asynchronous and variable length, data packets at 10 Gb/s. It is compact and(More)
Grating coupler structures have attracted prominent research and development efforts to address off-chip, vertical light coupling for wafer-level test and complex optical assemblies. In fact, three-dimensional (3D) integration is introduced as the key enabling technology for low footprint, high frequency and low loss silicon photonic and opto-electronic(More)
We present a heterogeneous passive WDM RoF system that is capable of simultaneously delivering broadband wireless 500 Mb/s services at 5 GHz RF carriers and 2.5 Gb/s LAN traffic at 60 GHz RF carriers over a standard single mode fiber. Our system employs phase modulation formats and optical frequency multiplication in order to increase the transmission(More)