Optical fiber communication system, plastic optical fiber cable and active optical cable

By designing multi-core plastic optical fiber cables, the problems of high power consumption and bending loss in optical fiber communication systems are solved, achieving low-cost and high-efficiency optical communication with excellent mechanical strength and low communication errors.

CN122029463APending Publication Date: 2026-05-12ASAHI KASEI KOGYO KABUSHIKI KAISHA
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Patent Information

Application Number
CN202480066124.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-10-19
Filing Date
2024-10-18
Publication Date
2026-05-12

AI Technical Summary

Technical Problem

In existing optical fiber communication systems, insufficient single-core or core count of optical fibers leads to high power consumption and high cost. Furthermore, glass optical fibers are prone to transmission obstacles and bending losses when bent, while plastic optical fibers experience increased light loss and shorter communication distances when the bending radius increases.

Method used

Multi-core plastic optical fiber cable is used. By determining the relationship between the number of micro LEDs and the photodiode array, the static bending loss is ensured to be less than 0.2dB when the bending radius is 3mm. Acrylic resin is used to form the core, fluororesin is used to form the sheath, and a cover layer is added on the outside. The refractive index and thickness ratio of the core and sheath are optimized.

Benefits of technology

This has enabled the development of an optical fiber communication system that exhibits excellent mechanical strength under bending conditions, fewer communication errors, and reduced costs, thereby improving communication efficiency and reliability.

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Abstract

An optical fiber communication system is provided with a plastic optical fiber cable (10), light-emitting elements (3, 3 ') formed from a micro-LED array having a number a (a > = 2) of micro-LEDs, and light-receiving elements (4, 4') formed from a photodiode array having a number a or more photodiodes, the plastic optical fiber cable (10) further has a cover layer on the outside of a plastic optical fiber formed from two or more cores and a first sheath layer surrounding the peripheries of the cores, b or more cores (a < = b) among the two or more cores are effective cores for receiving light from the light-emitting element, the cores are formed from an acrylic resin, and b or more cores are effective cores for receiving light from the light-emitting element. The plastic optical fiber cable 10 has a static bending loss of 0.2 dB or less when the bending radius r is 3 mm.
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