Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Plastic optical fibre"”.
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Optimising the plastic optical fibre evanescent field biofilm sensor
… and application of large diameter multimode plastic optical fibre (POF) sensors using evanescent field modulation. The exposed polymethylmethacrylate (PMMA) core of the POF fibre forms the sensor interface that detects refractive index changes of a measurand acting as the cladding. When a …
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Plastic optical fibre couplers with wavelength division multiplexing capability for short-range peer-to-peer communication in networking and industrial applications
… and simulation of adjustable, multi-output plastic optical fibre (POF) array couplers for wavelength-division multiplexed (WDM) transmission in the visible spectrum. The research focuses on three configurations—1×2, 1×4, and 1×8—and introduces a novel architecture that allows precise control …
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High performance photodetectors for multimode optical data links
… suitable for glass multimode or single mode fibre applications. The recent successful commercialisation of very large core diameter plastic optical fibre in systems based around 650 nm emitters, as well as the recent emergence of new polymer materials enabling relatively low loss at the more …
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High performance III-nitride light-emitting diodes for visible light communications and micro-displays
… bandwidths of the devices. For this reason, optical data transmission was demonstrated from individual micro-LED pixels at bit rates of up to 1 Gbit/s using a high-speed probe under a binary amplitude modulation scheme. To make a more practical VLC system, micro-LED devices were integrated …
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High Speed Optical Links Using CAP Modulation and Novel Equalisation Techniques
High speed optical links suffer from inter-symbol-interference (ISI) due to their limited bandwidth. Equalisation is typically used to mitigate ISI and therefore improve the link capacity. This dissertation explores novel equalisation techniques for carrierless amplitude and phase (CAP) modulation …
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Transmission capacity improvement for high speed multimode waveguide links using advanced optical launch and multilevel modulation schemes
… investigates the potential technologies in both optical and electrical domains for transmission capacity improvement in multimode waveguide links. The first half of the dissertation focuses on the multimode waveguide made from glass, the multimode glass fibre. A new optical launch scheme is …
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Fluid flow measurement using electrical and optical fibre strain gauges.
… of 0.02 m/s over a range from 0 to 0.4 m/s. An optical fibre strain sensor has been designed and developed by inserting grooves into a multimode plastic optical fibre. As the fibre bends, the variation in the angle of the grooves causes an intensity modulation of the light transmitted through …
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Transmission Capacity Improvement for Single Photon Avalanche Diode-based Optical Communication Using PAM Modulation
… potential transmission capacity improvement in optical communication links due to the use of single photon avalanche diode (SPAD) optical receivers. Currently, for non-optically amplified optical communication links that use intensity modulation with direct detection, the highest optical …