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Open Access research which pushes advances in bionanotechnology

Strathprints makes available scholarly Open Access content by researchers in the Strathclyde Institute of Pharmacy & Biomedical Sciences (SIPBS) , based within the Faculty of Science.

SIPBS is a major research centre in Scotland focusing on 'new medicines', 'better medicines' and 'better use of medicines'. This includes the exploration of nanoparticles and nanomedicines within the wider research agenda of bionanotechnology, in which the tools of nanotechnology are applied to solve biological problems. At SIPBS multidisciplinary approaches are also pursued to improve bioscience understanding of novel therapeutic targets with the aim of developing therapeutic interventions and the investigation, development and manufacture of drug substances and products.

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Demonstration of 16-channel multiple-access analog optical TDM with 10 ps channel spacing

Toliver, P. and Glesk, Ivan and Prucnal, P.R. (1999) Demonstration of 16-channel multiple-access analog optical TDM with 10 ps channel spacing. In: Conference on Lasers and Electro-Optics, 1999, CLEO '99. IEEE, Piscataway, NJ, United States, pp. 327-328. ISBN 1557525951

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Many high-bandwidth analog communication systems require the processing of a large number of analog signals such as CATV distribution networks and antenna routing subsystems. Fiber optics technology has the capability to meet the requirements of these applications. Thus far, the vast majority of research on fiber-optic analog communications has concentrated on the modulation of continuous wave (CW) lasers for encoding data, such as sub-carrier multiplexing (SCM). However, since the signals are multiplexed and demultiplexed in the electrical domain, the maximum number of channels is limited in such a system due to intermodulation distortion caused by nonlinearities in the electrical-optical-electrical conversion process. In contrast, the techniques presented in the work are based on the multiplexing and demultiplexing of signals in the optical domain, thereby reducing nonlinear interactions between channels. In our approach, each analog signal is encoded as an envelope onto an optical pulse train. By using ultrashort optical pulses to sample the analog waveforms, multiple channels can be interleaved and combined resulting in TDMA frames of pulsed analog data. The individual channels can then be extracted from the aggregate pulse stream with the use of an ultrafast optical gating device, such as the terahertz optical asymmetric demultiplexer.