When we talk about installing a structured cabling system, factors such as electrical safety, communication quality and system stability are the primary considerations. In order to verify whether the cabling system meets the relevant requirements, it is necessary to conduct relevant tests. The acceptance test of optical fiber cabling can refer to the international standard ISO/IEC 14763-3.
ISO/IEC 14763-3 specifies methods for inspecting and testing installed optical fiber cabling, which are designed in accordance with standards including ISO/IEC 11801-1 cabling standards. The test methods refer to existing standard-based procedures. The standard was first published in June 2006 and updated to the latest version ISO/IEC 14763-3:2024 in May 2024. The standard details compliance, test equipment, testing, performance evaluation of installed cabling components using OTDR, and recording of test results. The main updates of ISO/IEC 14763-3:2024 are as follows:
The content of plastic optical fiber cabling has been deleted
In ISO/IEC 14763-3:2014, the relevant content about plastic optical fiber cabling is: Before testing, in the absence of detailed information of the cabling system under test, some test methods in this part may also be applicable to plastic optical fiber cabling (for example: attenuation test). The test method of A4 plastic optical fiber is specified in IEC 60793-2-40.
ISO/IEC 14763-3:2024 removes the content about plastic optical fiber cabling in ISO/IEC 14763-3:2014, and the control standards for plastic optical fiber cabling will be specified by other IEC standards.
Added the test of MPO cabling system
From cloud computing to AI big data application evolution, the communication rate of optical fiber communication interconnection system has increased unprecedentedly. Among the various ways to increase the rate of optical fiber communication system, parallel optical fiber has always been a good solution. Based on the improvement of single-channel rate, parallel fiber technology amplifies the single-channel rate to increase the system communication rate. Correspondingly, the application scenario of MPO fiber coupling using multi-core fiber connection technology becomes more common. The author believes that the addition of the test part of MPO cabling system in ISO/IEC 14763-3:2024 is also based on the development trend of network applications of optical fiber cabling.
Added the light source optical power meter method to test E2E link and MPTL
The light source optical power meter method tests the E2E (End-to-end) link and the test reference plane of MPTL (modular plug terminated link)
Source: ISO/IEC 14763-3:2024
All test methods have added the description of measurement uncertainty
The specific research report on measurement uncertainty refers to IEC TR 61282-14:2024. Factors causing measurement uncertainty include environment (temperature and humidity), operator skills, test methods, measuring instruments, test system settings, cabling methods, etc. They generate uncertainty in the measurement results under different links and conditions.
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Analysis of the source of uncertainty: Fishbone diagram analysis Source: IEC TR 61282-14:2024
In ISO/IEC 14763-3:2024, from Article 7.5 to Article 7.9, from the measurement uncertainty of "attenuation of optical fiber cable" to the measurement uncertainty of the "attenuation of local and remote test interfaces" test system, from the measurement uncertainty of the "attenuation of connection hardware" test system to the measurement uncertainty of the "return loss of connection hardware" test system to the uncertainty of "optical fiber length" measurement, each test method involves the analysis of measurement parameters and uncertainties related to different types of optical fibers (SMF and MMF). There are assumptions about the test, such as bidirectional measurement, minimum dynamic margin, OTDR linear regression distance, and distance between points. For example, in 7.6.2 and 7.7.2, it is assumed that bidirectional measurement, minimum dynamic margin of 10dB, OTDR linear regression of 100 meters, and distance between points of 1 meter (100 points) are used to calculate the uncertainty under 95% confidence.
Test limit requirements for connector attenuation are introduced
According to Section 5.6.2 "Attenuation requirements for connection hardware" in ISO/IEC 14763-3:2024, the main performance requirements of different types of connectors are different.
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Connector identification and attenuation test limits
It can be clearly seen from the above-presented chart data that ISO/IEC 14763-3:2024 has updated the reference limits for connectors. The two rightmost columns in the above figure are "Test limits from reference connector to reference connector" and "Test limits from reference connector to standard connector". Taking Rm1 as an example, the upper limit of the loss of a standard test busbar with a reference connector is 0.10dB; if the test busbar with a reference-grade connector is used to test a standard-grade connector, its upper limit is 0.45dB. The upper limit of Zhaolong's multimode products is 0.15dB, and the upper limit of single-mode products is 0.25dB. The performance parameters are far better than the parameter requirements set by the standard.
Another example is Rm24, the upper limit of the loss of a standard test busbar with a reference connector is 0.20dB; if the test busbar with a reference connector is used to test a standard-grade connector, its upper limit is 0.45dB. In the Zhaolong Z series ultra-low-loss optical fiber cabling system solution, the maximum loss of the 24-core MPO/MTP multimode connector is 0.20dB, which meets the processing requirements of the standard test busbar and has performance advantages under high quality requirements.
Zhaolong OS2 fiber optic patch cord, Zhaolong OM3 fiber optic patch cord and Zhaolong OM4 fiber optic patch cord (from left to right)
Zhaolong single-mode fiber optic cabling system adopts high-precision ceramic ferrules, advanced grinding technology and equipment. The technical parameters of the vertex offset, fiber height and curvature radius of the single-core fiber optic connector meet the GR-326-CORE and IEC 61755 standards. The multi-core fiber optic connector adopts high-precision MPO/MTP connection components, which meet and exceed GR-1435-CORE and IEC 61754-7, with good repeatability and high reliability. The product has passed 100% optical performance testing, low loss, high return loss, high reliability, and also selects bend-insensitive single-mode optical fibers, which are suitable for dense wiring scenarios and reduce the difficulty of operation and maintenance. At the same time, it adopts high-quality environmentally friendly materials and complies with RoHS and REACH requirements.
Zhaolong multimode fiber optic cabling system provides comprehensive cabling solutions, including wiring products that meet fusion needs, high-density and ultra-high-density pre-terminated fiber optic wiring products. It has time and cost advantages, adopts modular design, plug and play, saves installation time, reduces management and maintenance costs, and supports customization of various lengths, polarities, and core numbers. Its components have excellent performance, and the selected high-performance and high-reliability connection components meet and exceed international standards. The connector products have passed 100% optical testing, have 3D guarantee, low loss, excellent system performance, and the fiber performance meets and exceeds the IEC 60793-2-10 standard. The system performance meets and exceeds the ISO/IEC 11801-1 standard.
Zhaolong Optical Cable
In summary, the continuous updating and improvement of the ISO/IEC 14763-3:2024 standard provides more stringent and precise specifications for the testing of optical fiber cabling systems. On the basis of following this standard, Zhaolong optical fiber cabling products have demonstrated excellent performance and advantages, providing reliable guarantees for the communication needs of various industries. With the continuous advancement of technology, I believe that the future field of optical fiber cabling will usher in more innovations and developments, bringing more efficient and stable communication experience to people's lives and work. Stay tuned for the next article~
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