EN IEC 61757-1-2:2023
(Main)Fibre optic sensors - Part 1-2: Strain measurement - Distributed sensing based on Brillouin scattering
General Information
- Abstract
IEC 61757-1-2: 2023 defines detailed specifications for distributed strain measurements with a fibre optic sensor, also known as "fibre optic distributed strain sensing". It is applicable to distributed strain sensing systems (DSS) based on spontaneous or stimulated Brillouin scattering in the optical fibre sensor (strain sensitive element), that is, to sensors capable of measuring absolute strain. This document specifies the most important DSS performance parameters and defines the procedures for their determination.
- Status
- Published
- Publication Date
- 21-Sep-2023
- Technical Committee
- CLC/SR 86C - Fibre optic systems and active devices
- Drafting Committee
- IEC/SC 86C - IEC_SC_86C
- Current Stage
- 6060 - Document made available - Publishing
- Start Date
- 22-Sep-2023
- Due Date
- 25-Aug-2023
- Completion Date
- 22-Sep-2023
Overview
EN IEC 61757-1-2:2023 - Fibre optic sensors: Strain measurement (Brillouin-based distributed sensing) describes detailed specifications and test procedures for distributed strain sensing systems (DSS) that use spontaneous or stimulated Brillouin scattering in optical fibre to measure absolute strain. Published by CLC/CENELEC and identical to IEC 61757-1-2:2023, this standard defines the key performance parameters, test setups and measurement procedures necessary to evaluate and report DSS performance.
Key topics and requirements
- Scope and applicability: Applies to fibre optic distributed strain sensing systems (DSS) based on Brillouin scattering capable of absolute strain measurement.
- Performance parameters specified:
- Strain measurement error
- Spatial resolution
- Strain repeatability
- Spatial strain uncertainty
- Warm‑up time
- System behaviour with altered attenuation (performance at distance range and at short distances with high loss)
- Test setups and procedures:
- General test setup requirements for single‑ended and loop configurations
- Documentation requirements for test conditions and reporting
- Detailed measurement procedures and parameter calculation methods
- Measurement uncertainty: Guidance references ISO/IEC Guide 98-3 (GUM) for expressing uncertainty.
- Reporting: Defines how to calculate and report each performance metric to ensure consistent, reproducible results.
Practical applications
EN IEC 61757-1-2:2023 is directly applicable where continuous, distributed strain monitoring is required, for example:
- Infrastructure and civil engineering (bridges, tunnels, dams)
- Geotechnical and landslide monitoring
- Pipeline and oil & gas structural monitoring
- Rail and transportation asset monitoring
- Utility and energy asset integrity
Using a standardized approach ensures measurement comparability, supports procurement specifications, and helps validate sensor system claims in field and laboratory evaluations.
Who should use this standard
- Fibre optic sensor manufacturers developing or certifying Brillouin‑based DSS
- Test and calibration laboratories performing performance characterization and acceptance testing
- Systems integrators and consultants specifying sensing solutions for infrastructure monitoring
- Asset owners and operators who require validated measurement performance and traceable reporting
Related standards
- IEC 61757 - Fibre optic sensors - Generic specification
- IEC 61757-2-2:2016 - Temperature measurement - Distributed sensing
- IEC 61757-3-2:2022 - Acoustic sensing and vibration measurement - Distributed sensing
- ISO/IEC Guide 98-3 - Guide to the expression of uncertainty in measurement (GUM)
EN IEC 61757-1-2:2023 provides a practical, standardized framework for evaluating Brillouin-based distributed strain sensing, improving interoperability, credibility and acceptance of fibre optic DSS in critical monitoring applications.
Relations
- Effective Date
- 20-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Refers
EN 61757-2-2:2017 - Fibre optic sensors - Part 2-2: Temperature measurement - Distributed sensing - Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
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Frequently Asked Questions
EN IEC 61757-1-2:2023 is a standard published by CLC. Its full title is "Fibre optic sensors - Part 1-2: Strain measurement - Distributed sensing based on Brillouin scattering". This standard covers: IEC 61757-1-2: 2023 defines detailed specifications for distributed strain measurements with a fibre optic sensor, also known as "fibre optic distributed strain sensing". It is applicable to distributed strain sensing systems (DSS) based on spontaneous or stimulated Brillouin scattering in the optical fibre sensor (strain sensitive element), that is, to sensors capable of measuring absolute strain. This document specifies the most important DSS performance parameters and defines the procedures for their determination.
IEC 61757-1-2: 2023 defines detailed specifications for distributed strain measurements with a fibre optic sensor, also known as "fibre optic distributed strain sensing". It is applicable to distributed strain sensing systems (DSS) based on spontaneous or stimulated Brillouin scattering in the optical fibre sensor (strain sensitive element), that is, to sensors capable of measuring absolute strain. This document specifies the most important DSS performance parameters and defines the procedures for their determination.
EN IEC 61757-1-2:2023 is classified under the following ICS (International Classification for Standards) categories: 33.180.99 - Other fibre optic equipment. The ICS classification helps identify the subject area and facilitates finding related standards.
EN IEC 61757-1-2:2023 has the following relationships with other standards: It is inter standard links to ISO/IEC Guide 98-3:2008, EN IEC 61757-3-2:2022, EN IEC 61757:2018, EN 61757-2-2:2017, EN IEC 61757-1-4:2026. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN IEC 61757-1-2:2023 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.