G657B3 Ultra biegeunempfindliche Faser - direkt vom Hersteller

Technische Spezifikationen der ultra-biegeunempfindlichen Faser G657B3

G657B3 Ultra biegeunempfindliche Faser - direkt ab Werk

G657B3 ultra bend insensitive fiber represents the most advanced category of bend-tolerant single-mode optical fiber available on the market today, engineered specifically for deployment environments where tight routing radii and extreme bending conditions are unavoidable. Compliant with ITU-T G.657.B3 standards, this fiber delivers exceptional performance in fiber-to-the-home (FTTH), in-building wiring, and last-mile connectivity installations where conventional fibers would suffer unacceptable signal loss. With a minimum bend radius as low as 5 mm, it withstands installation stresses that would render standard G.652 or even G.657.A fibers inoperable. Telecom operators, contractors, and network integrators worldwide rely on G657B3 fiber to future-proof their infrastructure while reducing installation complexity. As a mill-direct supplier, we offer premium-grade G657B3 ultra bend insensitive fiber at cost-effective rates, backed by rigorous quality control at every stage of production.

What is G657B3 Ultra Bend Insensitive Fiber?

G657B3 ultra bend insensitive fiber is a single-mode optical fiber defined under ITU-T G.657 Category B, Sub-category 3. It is specifically optimized for ultra-tight bend applications, tolerating bend radii down to 5 mm with macrobending loss not exceeding 0.15 dB per turn at 1550 nm wavelength. Unlike Category A fibers, G657B3 is not required to maintain full compatibility with G.652 fiber, allowing its refractive index profile to be more aggressively optimized for bend resistance. It finds extensive application in dense urban FTTH drop cables, riser installations, and confined-space optical routing.

G657B3 Ultra Bend Insensitive Fiber Manufacturing Process

The production of G657B3 ultra bend insensitive fiber begins with the fabrication of a specially engineered preform using the Modified Chemical Vapor Deposition (MCVD) or Outside Vapor Deposition (OVD) process. A trench-assisted or hole-assisted refractive index profile is precisely constructed around the core to suppress light leakage during bending. The preform is then drawn at temperatures exceeding 2,000°C into fiber with a nominal outer diameter of 125 ± 0.7 µm, followed by dual-layer UV-cured acrylate coating application to achieve a final coating diameter of 245 ± 5 µm, ensuring mechanical durability and environmental protection.

G657B3 Ultra Bend Insensitive Fiber Technical Specifications

Our G657B3 ultra bend insensitive fiber meets or exceeds all ITU-T G.657.B3 requirements. Key parameters include: attenuation ≤ 0.4 dB/km at 1310 nm and ≤ 0.3 dB/km at 1550 nm; macrobend loss at 10 mm bend radius ≤ 0.03 dB/turn at 1550 nm and ≤ 0.1 dB/turn at 1625 nm; macrobend loss at 7.5 mm bend radius ≤ 0.08 dB/turn at 1550 nm; macrobend loss at 5 mm bend radius ≤ 0.15 dB/turn at 1550 nm. Mode field diameter measures 6.3–9.5 µm at 1310 nm, with a cutoff wavelength ≤ 1260 nm. Proof test level is 0.69 GPa (100 kpsi) as standard, with higher proof test options available upon request.

Get a Competitive Quote for G657B3 Ultra Bend Insensitive Fiber

Partner with our mill-direct team to source superior-quality G657B3 ultra bend insensitive fiber at the most competitive pricing for your project scale. Whether you require small evaluation quantities or large-volume bulk orders, our technical team is ready to deliver customized solutions with fast lead times and full documentation support.

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