scope:

Is applicable to fibre optic branching devices. These have all of the following general features: - they are passive in that they contain no optoelectric or other transducing elements; - they have three or more ports for the ingress and/or egress of optical power and share optical power among these ports in a predetermined fashing; - the ports are optical fibres or optical fibre connectors. In this generic specification, fibre optic branching devices are classified by wavelength dependance into two sub-families; wavelength selective devices and non-wavelength selective devices, each of which will be covered by a seperate blank detail specification.