Overview - EN ISO 11554:2025 (Corrected version 2025-10)
EN ISO 11554:2025, published by CEN and ISO (ISO 11554:2025), specifies standardized test methods for laser beam radiant power, radiant energy and temporal characteristics. It covers both continuous-wave (cw) lasers and pulsed lasers, defining measurement and evaluation procedures for pulse shape, pulse duration, pulse repetition rate and stability metrics. This fifth edition updates terminology (using “radiant power/energy”), aligns with ISO 80000‑7:2019, and replaces EN ISO 11554:2017.
Key topics and technical requirements
- Measurement scope
- Radiant power of cw lasers and radiant pulse energy of pulsed lasers.
- Temporal characteristics: pulse shape, pulse duration, rise/fall times, peak radiant power, and repetition rate.
- Stability and noise
- Radiant power stability (cw), radiant energy stability (pulsed), pulse duration stability.
- Relative intensity noise (RIN) measurement and analysis (Annex A provides informative guidance).
- Measurement configuration & equipment
- Guidance on detectors, beam‑forming optics, optical attenuators, and test fixtures for sources with small/large divergence.
- Control of environmental impacts and methods to remove thermal/shot and pre‑amplifier noise contributions during RIN measurement.
- Frequency response
- Small‑signal cut‑off frequency test methods for detector/electronic systems.
- Evaluation & reporting
- Standardized evaluation procedures and required contents for a formal test report to ensure traceable and comparable results across labs.
Practical applications and users
Who uses EN ISO 11554:2025:
- Laser manufacturers and component suppliers - for product specification, production testing and quality control.
- Test laboratories and national metrology institutes - for calibrated measurement procedures and inter‑lab comparison.
- OEMs and system integrators - to validate laser modules in industrial, medical and scientific systems.
- R&D teams - for reliable characterization of new laser sources and modulation behaviour.
- Regulators and safety officers - as a reference for performance verification and compliance testing.
Typical application areas:
- Industrial material processing, medical and aesthetic lasers, telecommunications, lidar and sensing, and photonics research where accurate measurement of radiant power, pulse energy and temporal stability is essential.
Related standards
- ISO 80000‑7:2019 (terminology alignment for radiometric quantities)
- Note: IEC 61040:1990 is withdrawn and removed from normative references in this edition.
Keywords: EN ISO 11554:2025, laser test methods, radiant power measurement, radiant energy, pulse duration, temporal characteristics, cw lasers, pulsed lasers, RIN, laser beam testing.
