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Development trend of micro optical cables

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Development trend of micro optical cables

作者: 通讯光缆点击: Release Date: 2018-05-18 Author: communications cable click:

Communication optical cable

通信光缆

In recent years, the industry has been focusing on reducing the footprint of fiber optic networks. It can be said that with the development of small bend radius (RBR) fibers by fiber suppliers around 2005, the trend towards smaller cables and hardware has begun to emerge. Soon after these new optical waveguide designs appeared, an international standard was developed to regulate them, namely ITU G657. Subsequently, as the fiber's tolerance for macrobending and microbending gradually increased, these "knotted" fibers began to allow smaller cable designs.

Macro and Micro Benefits of Small Bend Radius Fibers

Macrobending is a simple phenomenon that is easy to understand. ITU G657 specifies special optical loss specifications at special bending radii for macroscopic bending performance. However, there are some claims that the improvement in microbend performance comes from the main characteristic of small bend radii, which enables smaller size and higher performance wiring. One way to actually analyze the difference between macrobends and microbends is to imagine winding an optical fiber around your finger, measuring the fiber loss (macrobending), pressing a piece of sandpaper on the fiber and measuring the corresponding Loss (microbend loss) and then compare the difference between the two.

In both cases, the fundamental optical phenomena that cause signal loss are very different. When the fiber optic cable is exposed to a low temperature environment, the material in the fiber optic cable will tend to shrink and exert a force along the length of the fiber. This force causes microbending of the optical fiber in the cable. For example, the improved microbend tolerance of small bend radius fibers can undoubtedly help the cable withstand large temperature changes.

One of the main factors of small radius cables is patch cords and other direct connection cables. In addition to the obvious benefit of being able to install more fiber-optic cables in the same space, smaller fiber-optic cables can also speed up air flow because fiber-optic cables take up less duct space. As active electronic component suppliers attempt to miniaturize and consolidate electronic cabinets, the importance of this advantage will become more apparent. In such electronic cabinets, heat is becoming an important issue. Generally, people consider the airflow along the copper cable (the copper cable itself generates heat). But as equipment cabinets become smaller and hotter, all aspects of airflow become important.

Global cable manufacturers are taking advantage of this characteristic of small bend radius fibers. Their "wish" is to develop a fiber optic cable that can be used like a copper cable-rugged, small, practical, and easy for anyone to operate without damaging the fiber. To achieve this goal, people have also innovated the materials used in the manufacture of fiber optic cables. The bending performance of small bend radius optical fibers has been improved, and the use of new materials and new manufacturing technologies in the manufacture of optical cables has been promoted, thereby making the optical cables smaller and lighter. Together, these problems can be solved to produce a new generation of optical cables with smaller size and greater flexibility.


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