IEC 60793-2-90:2012, also known as International Electrotechnical Commission standard 60793-2-90:2012, is a technical specification that provides guidelines for the characterization of optical fibers used in telecommunications and data communication systems. This standard sets forth parameters and test methods to evaluate the performance and quality of optical fibers.
Characteristics and Specifications
The IEC 60793-2-90 standard specifies various parameters to describe the characteristics and performance of optical fibers. These parameters include attenuation, mode field diameter, numerical aperture, dispersion, polarization mode dispersion, cut-off wavelength, and fiber geometry. Each parameter plays a crucial role in determining the suitability of the fiber for specific applications.
Attenuation refers to the loss of signal strength as it travels through the fiber. Mode field diameter indicates the size of the light-carrying core inside the fiber. Numerical aperture determines the acceptance angle of the fiber, indicating its ability to capture light from a source. Dispersion measures the spreading of light pulses as they propagate through the fiber. Polarization mode dispersion evaluates the variation in transmission delay between different polarization states of light. Cut-off wavelength defines the longest wavelength at which a fiber can support single-mode transmission. Fiber geometry includes parameters related to core diameter, cladding diameter, and cladding non-circularity.
Testing Methods
IEC 60793-2-90 specifies various testing methods to assess the aforementioned parameters. These methods ensure accurate and reliable measurements of fiber characteristics. For example, attenuation is measured using an optical time-domain reflectometer (OTDR) or an insertion loss method. Mode field diameter is determined using near-field scanning or interferometric techniques. Dispersion and polarization mode dispersion are evaluated using specialized instruments such as dispersion analyzers and polarization-mode dispersion testers.
Applications and Importance
IEC 60793-2-90 plays a critical role in the telecommunications industry by providing standard specifications for optical fibers. These fibers are used extensively in long-distance communication systems, data centers, fiber-optic networks, and submarine cables. Compliance with this standard ensures compatibility and interoperability between different manufacturers' products. It also helps network designers and engineers in selecting the appropriate fiber for their specific requirements, considering factors such as bandwidth, transmission distance, and environmental conditions.
In summary, IEC 60793-2-90:2012 is a technical standard that outlines the parameters, characterization methods, and testing procedures for optical fibers. Understanding and complying with this standard is essential for the optical communications industry to ensure reliable and high-performance fiber networks.
Nina She