scope:

This part of IEC 62074 applies to fibre optic wavelength division multiplexing (WDM) devices.
These have all of the following general features:
- They are passive, in that they contain no optoelectronic or other transducing elements; but they may use temperature control only the purpose to stabilize the characteristics of devices; they exclude any optical switching function;
- They have three or more ports for the entry and/or exit of optical power, and share optical power among these ports in a predetermined fashion depending on the wavelength;
- The ports are optical fibres, or optical fibre connectors.
This standard establishes uniform requirements for the following:
- Optical, mechanical and environmental properties;
- Measurement and test procedures for quality assessment.