Abstract: A termination for an optical fibre includes a planar support block which has an aperture there-through for receiving and accurately locating an optical fibre end. It is constructed out of a plurality of platelets, the aperture being provided by aligned, laser-drilled holes which are formed in each platelet. The holes, which are characteristically tapered, all taper in the same direction. They can therefore act as guides during insertion of a fibre end. Alternative arrangements are described. The termination is for use wherever an optical fibre must be accurately located relative to another component. If finds particular application as a support for a rear-entry photodiode.