Special optical fibres (SOF) are gaining in interest because of their increasing potential applications in optical sensing and (coherent, distributed) optical signal processing technologies. Classical optical fibres, optimized for communications, give much poorer performance of the sensory system than give specialty fibres optimized for sensing and direct optical signal processing. The specialty fibres, or at least some of their families, are technologically sensitized to the desired measurand and simultaneously desensitized to the most of harmful external reactions from the environment. We are manufacturing our specialty fibres using three major technologies - all of them actually hybrid: multi-rod-in-tube (MRiT), multi-crucible-zone-diaphragm (MZD) and mosaic assembling defibering (MAD/MAT). Some of these technologies use, in certain cases, MCVD processes and other high-temperature sub-stages.