This International Standard applies to circulators used in the field of fibre optics bearing all of the following features:
- they are non-reciprocal optical devices, in which each port is either an optical fibre or optical fibre connector;
- they are passive components containing no opto-electronic or other transducing elements;
- they have three or more ports for directionally transmitting optical power.
This standard establishes uniform requirements for the following:
- fibre optic circulator requirements;
- quality assessment procedures.