The growing data traffic in the local area networks is driving development of the cost‐effective transmission systems that can carry it effectively. In this study, firstly, we investigate the influence of a semiconductor optical amplifier (SOA) on the transmission quality in the 1310 nm wavelength‐division‐multiplexed system. We examine the differences in the channels gain and power penalty depending on the applied channel spacing. Moreover, we analyse the transmission‐related power penalty suffered during the transmission over the link consisting of the standard single‐mode fibre (SSMF) and a SOA. Furthermore, we propose the 1310 nm dense‐wavelength‐division multiplexed and polarisation multiplexed transmission system architecture which counteracts the key performance limitation that can be encountered in the 1310 nm window transmission systems. The demonstrated n × 2 × 40 Gbit/s transmission system is based exclusively on semiconductor components without any form of the chromatic dispersion compensation or error correction. Results of the conducted experiments show the excellent error‐free 8 × 2 × 40 Gbit/s all‐semiconductor transmission over 25 km of SSMF. The demonstrated transmission system can be utilised to realise ultra‐high‐speed connections like the next generation 400 Gbit/s and 1 Tbit/s Ethernet.

A methodology for acquisition and preprocessing of real-world data, necessary for the development of classification algorithms dedicated to fall detection, is proposed. Raw measurements are acquired by means of infrared depth sensors. Their preprocessing consists of two main operations: extraction of the silhouette from the depth image and estimation of the coordinates of the center of that silhouette and its magnitude. The algorithms of classification under development are supplied with sequences of those parameters, corresponding to the consecutive images acquired by a depth sensor.