Russian researchers from the Perm Physical and Mathematical Center and PNRPU have developed an innovative stand for quality control of optical fibers.
The system allows simultaneous measurement of key parameters of preforms, which significantly speeds up the process and improves product quality.
Too much erbium – the light goes out, too little – the fiber loses efficiency.
Optical fibers play an important role in modern technologies, including lasers and communication systems. Their production begins with the creation of a glass preform, to which rare earth metals (e.g., erbium) are added to improve light transmission.
Previously, quality control was carried out in stages, which took a lot of time and required the use of toxic substances. With the new stand, all measurements are combined into one procedure. The use of hazardous materials is excluded.
A preform with a length of 10 centimeters to 1.5 meters passes through an infrared laser, which records the glow of impurities. A white LED is used to analyze light refraction, which allows detecting defects. The measurement accuracy reaches 95%.
The stand is already being tested in industry. Scientists plan to expand its functions by analyzing other impurities, as well as using artificial intelligence. Thanks to this, the production of optical fiber will become more accessible and efficient.
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