IEC 62077:2010(E) applies to fibre optic circulators, which are:
- non-reciprocal optical devices;
- passive components;
- have three or more ports for directionally transmitting optical power. This standard establishes circulator requirements and quality assessment procedures. The changes with respect to the previous edition are listed as:
- having substantially increased the number of terms;
- having added an informative annex for examle of filtering technologies;
- having deleted quality assessment procedures.