A new technological method of optical fibre production (called here Multicrucible-zone--Diaphragm), being a developed version of double crucible and rod-in-tube technologies, has been presented. Monomode optical fibres with multistep - index and gradient profiles for flatened dispersion characteristics and sensors applications have been pulled and measured. Diffusion processes of modifying ions in MZD preforms have been investigated. Exemplary details of the technological process are given and debated. The major data of pulled fibres are presented.