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Latest Classification Standards for Fiber Optic Sensor Networks

The latest standards for fiber optic sensor networks are primarily defined by GB/T 18901.1-2025 and the IEC 61757 series, covering classification, testing, and measurement procedures for high-precision, interference-resistant fiber optic sensors.Key Standards Overview

GB/T 18901.1-2025 is the updated Chinese national standard for fiber optic sensors, replacing the 2002 version. It establishes general specifications for fiber optic sensors, including optical fibers, devices, and accessories. The standard defines classification criteria based on transducer principles, spatial distribution, interface types, and measurement characteristics such as accuracy, resolution, sensitivity, and stability. It also specifies testing procedures for optical, electrical, mechanical, and environmental performance, including resistance to ambient light, solvents, and temperature variations, ensuring reliable sensor operation in diverse conditions (GB/T 18901.1-2025) . IEC 61757 series is the international benchmark for fiber optic sensor standards. It provides a comprehensive framework for sensor design, terminology, and measurement methodologies, including specialized parts like IEC 61757-8-1:2025 for pressure sensors using fiber Bragg gratings (FBGs). These standards define sensor architecture, calibration, and environmental control requirements, supporting high-precision measurements in gas and liquid environments (IEC 61757-8-1:2025) . IEC 61300-3-7:2021 focuses on passive fiber optic components, detailing standardized methods for evaluating wavelength-dependent attenuation and return loss of single-mode components. This ensures component integrity and consistent network performance, which is critical for sensor networks integrated into telecom or industrial systems (IEC 61300-3-7:2021) .

Classification and Testing Highlights
  • Transducer Principle: Defines the sensing mechanism (e.g., FBG, interferometric, intensity-based).
  • Spatial Distribution: Single-point vs. distributed sensing networks.
  • Interface Types: Analog, digital, or communication interfaces for data acquisition.
  • Measurement Characteristics: Accuracy, drift, gauge length, step response, and stability.
  • Environmental Testing: Temperature, humidity, mechanical stress, and chemical resistance.
  • Calibration and Traceability: Use of certified references for wavelength, attenuation, and optical power measurements.
Global Alignment and Compliance

These standards are designed to align national and international practices, enabling interoperability and industrial competitiveness. Compliance involves training personnel, upgrading measurement infrastructure (e.g., tunable light sources, depolarizers, power meters), and regular audits to maintain alignment with evolving editions . IEEE and FOA provide additional guidance on testing procedures and fiber optic network standards, complementing IEC and GB/T frameworks .

Practical Implications
  • Ensures high-precision, interference-resistant sensor networks.
  • Supports distributed sensing applications in industrial, structural, and environmental monitoring.
  • Facilitates global interoperability and adoption of fiber optic sensor technologies.
  • Provides a framework for certification, quality assurance, and R&D in fiber optic sensing systems. In summary, GB/T 18901.1-2025 and IEC 61757 series form the backbone of modern fiber optic sensor network standards, providing detailed classification, testing, and measurement protocols to ensure reliable, high-performance, and globally compatible sensor systems.
Latest Classification Standards for Fiber Optic Sensor Networks

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