Timothy B. Gibbon

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We present experimental demonstrations of in-building impulse radio (IR) ultra-wideband (UWB) link consisting of 100 m multi mode fiber (MMF) and 4 m wireless transmission at a record 4 Gbps, and a record 8 m wireless transmission at 2.5 Gbps. A directly modulated vertical cavity surface emitting laser (VCSEL) was used for the generation of the optical(More)
3 4 AbstractWe propose a novel reflectometric PMD measurement scheme based on a variation of the standard General Interferometric measurement Technique (GINTY). A brief theoretical background is presented and supported with preliminary experimental data analysis. We establish a good agreement between theory and experiment. Our proposed approach is simple(More)
The generation of photonic ultra-wideband (UWB) impulse signals using an uncooled distributed-feedback laser is proposed. For the first time, we experimentally demonstrate bit-for-bit digital signal processing (DSP) bit-error-rate measurements for transmission of a 781.25-Mb/s photonic UWB signal over fiber links. The DSP algorithm is described, the(More)
We demonstrate a RSOA based WDM radio-over-fiber, bidirectional system for wireless access networks. The multi-functionalities of a RSOA, such as colorless operation, re-modulation and envelope detection, make wireless access nodes more compact. ©2008 Optical Society of America OCIS codes: (060.5625) Radio frequency photonics, (060.4258) networks, network(More)
For 10 Gb/s transmission limited by multi-level burst transients to non error-free performance, including an SOA reduces the penalty to 0.4 dB relative to back-to-back transmission. Introduction Gigabit optical access links are commonly implemented by using passive optical network (PON) architectures. In order to reduce the cost of the overall system, a(More)
This work describes a distributed algorithm inspired by ant colony optimisation for a solution to the problem of dynamic routing and wavelength assignment with wavelength continuity constraint in optical burst switched networks. The evaluation was conducted in a wavelength division multiplexed network environment with limited number of wavelength channels(More)
We present a cooler-less, free-running 1550 nm vertical cavity surface emitting laser (VCSEL) directly modulated at 10.7 Gb/s. We also report on error-free transmission through 40 km of standard single-mode optical fiber, achieved without the use of dispersion-mitigation or mid-span amplification. Inverse-dispersion fiber was utilized to realize a(More)
Ant Colony Optimisation (ACO) has been extensively applied to the network routing problem. Simulated ants are used to explore the network while recording information regarding their success by means of pheromones that are deposited on the route. A balance must be found between exploration of new routes and exploitation of established routes. Modern Monte(More)