Overview
IEC 62077:2022 - "Fibre optic interconnecting devices and passive components - Fibre optic circulators - Generic specification" is the 4th edition international standard that defines generic requirements for fibre optic circulators. It applies to circulators that are:
- non‑reciprocal optical devices where each port is an optical fibre or fibre optic connector;
- passive components as defined by IEC TS 62538;
- equipped with three or more ports for directional transmission of optical power.
This edition is a technical revision of IEC 62077:2015, harmonizing terms with IEC TS 62627-09 and updating Clause 4 (requirements). Informative annexes give an example of magneto‑optic circulator technology (Annex A), a circulator application (Annex B) and interface styles (Annex C).
Key Topics and Requirements
- Classification and interfaces
- Port counts, port functions and interface styles for circulators (examples in Annex C).
- Terms and definitions
- Formal definitions for ports, transfer matrix, transfer coefficients and performance terminology (harmonized with IEC TS 62627-09).
- Performance requirements
- Directional transfer, insertion loss, isolation and other measurable optical characteristics (transfer matrix approach).
- Documentation and specification
- Required technical documentation, drawings, symbol usage and a specification system for manufacturers and purchasers.
- Tests and measurements
- Reference to basic test methods and measurement procedures (see IEC 61300 family) and requirements for test reports.
- Design, construction and quality
- Material, workmanship, marking, packaging, storage conditions and safety considerations.
- Reliability and standardization
- Links to interface, performance and reliability standards and guidance on variant identification.
Practical Applications and Who Uses It
IEC 62077:2022 is essential for:
- Optical component manufacturers designing and certifying circulators.
- Test laboratories performing standardized measurements and reporting.
- System integrators and equipment vendors specifying components for telecom, metro, data center and sensor networks.
- Procurement and quality teams ensuring components meet interoperable performance, safety and marking requirements.
Fibre optic circulators are used wherever directional routing of optical signals is required - for example in isolation, signal routing in WDM systems, fiber sensing and certain laser protection or monitoring arrangements (see Annex B for an example).
Related Standards
Relevant normative and reference documents include (but are not limited to):
For procurement, design or compliance work involving fibre optic circulators, IEC 62077:2022 provides the generic specification foundation for interoperable, testable and safely manufactured passive circulator products.