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When stress normally causes weakly guided modes to be coupled into the cladding, bend-insensitive fiber adds a layer of glass with a lower index of refraction around the core of the fiber.
This “reflects” the modes back into the core. In both BI SMF and BI MMF, the trench—or moat, as some refer to it—circles the core to reflect away light.
The trench is simply an annular ring of lower index glass that surrounds the core. The geometry of the trench was very carefully designed to get the most out of the effect. On this fiber drawing, notice the red band around the core.
The Global bend insensitive optical fiber market accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2022 to 2030.
its brand-new optical fiber that is “Bend Insensitive” in accordance with ITU-T Recommendation G.657.
There is a growing trend toward bringing the optical fiber in these networks closer and closer to the end user due to the current rapid growth of broadband services and the corresponding need to upgrade telecom infrastructures in the “last mile.”
The optical fibers will likely be subjected to higher levels of handling and more extreme degrees of bending as a result of this transition toward the ultimate goal of FTTH (Fiber to the Home).
The new, more stringent performance requirements that these applications now require are outlined in the most recent ITU-T Recommendation G.657, which is titled “Characteristics of a Bending Loss Insensitive Single Mode Optical Fiber and Cable for the Access Network.
” All of these requirements are met by CasaLight, particularly:demonstrates best-in-class performance against “high power” effects that can result in coating burns and glass fusion in certain amplified systems under severe bend conditions utilizes an environmentally friendly, fluorine-free manufacturing process as in all Prysmian fibers demonstrates improved mechanical reliability, increasing lifetime in environments where variations in temperature and moisture level together with tight bends are likely demonstrates compatibility with standard equipment, connectors, and fiber in accordance with ITU-T Recommendation G.652