Overview
ISO 11145:2026 - Optics and photonics - Lasers and laser-related equipment - Vocabulary and symbols is an international standard developed by ISO to provide a unified set of terms, symbols, and units for the laser technology field. This standard ensures clear, consistent communication in optics and photonics by establishing a common vocabulary for describing beam parameters, laser properties, and laser-related equipment. ISO 11145:2026 aids manufacturers, researchers, engineers, and testing laboratories in applying reproducible test methods and accurately describing laser product characteristics.
Key Topics
ISO 11145:2026 covers vital terminology and symbols, supporting precise measurement and specification of laser beams and devices. Key topic areas include:
- Beam Characteristics
- Definitions for beam position, axis, diameter, radius, width, and cross-sectional area
- Concepts of beam waist and divergence
- Parameters such as Rayleigh length, beam parameter product, and beam propagation factor
- Coherence and Polarization
- Temporal and spatial coherence, coherence length and time
- Forms of polarization: linear, circular, elliptical, and partial polarization
- Radiant Power and Energy
- Flounce, irradiance, average and peak power, radiant pulse energy
- Measurements for continuous wave and pulsed lasers
- Pulse Duration and Repetition Rate
- Definitions for pulse duration, full width half maximum (FWHM), and repetition rate
- Optical Resonator and Modes
- Structure of optical resonators and concepts of longitudinal and transverse modes
- Spectral Bandwidth and Noise
- Definitions for spectral bandwidth and relative intensity noise (RIN)
- Efficiency Metrics
- Laser efficiency, quantum efficiency, and device efficiency
ISO 11145:2026 also includes guidance for symbol usage and units of measurement, supporting international harmonization.
Applications
ISO 11145:2026 is a foundational reference in numerous optics and photonics industries, ensuring standardized communication for:
- Laser Manufacturing: Facilitates clear product specification and interoperability by defining critical terms such as laser beam, emission modes, and efficiency.
- Testing and Quality Assurance: Provides the basis for reproducible testing of beam parameters, leading to more reliable product performance evaluations.
- Research and Development: Ensures consistent terminology in academic and industrial research, fostering collaboration and innovation.
- International Trade: Supports regulatory compliance and product export by aligning with globally recognized laser terminology standards.
- Technical Documentation: Streamlines preparation of datasheets, manuals, and regulatory reports through use of accepted vocabulary.
By adopting ISO 11145:2026, professionals in optics, photonics, and laser-related domains can reduce misinterpretation, enhance collaboration, and improve the quality of products and documentation.
Related Standards
For comprehensive laser technology standardization, reference the following related standards:
- IEC 60825-1: Safety of laser products – Diverges in vocabulary purpose from ISO 11145; see Annex A of ISO 11145 for comparative explanation.
- ISO 11146 series: Measurement methods for beam width, divergence, and propagation ratio using second-moment techniques.
- ISO/TR 11146-3: Test methods using the moving slit technique for laser beam width.
- ISO 11670: Laser and laser-related equipment - Test methods for beam positional stability.
- ISO 13694: Standard on laser beam power (energy) density distribution measurements.
These and other international optoelectronics standards form a complete framework for the specification, measurement, and safety of lasers and laser-related equipment.
Keywords: ISO 11145:2026, laser vocabulary, laser symbols, laser terminology, optics and photonics standard, beam parameters, laser measurement, international laser standard, laser technology documentation.
