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| Property | Parameter | Description |
|---|---|---|
| Product Name | G657B3 Ultra Bend Insensitive Single-Mode Optical Fiber | Extreme bend-insensitive fiber for tight-space and harsh-environment installations |
| Fiber Category | ITU-T G.657.B3 / IEC 60793-2-50 B-657-B3 | Category B3 offers the highest bend tolerance within the G.657 family |
| Standard Compliance | ITU-T G.657B3, IEC 60793-2-50, TIA-492AAAE | Compliant with international single-mode bend-insensitive fiber standards |
| Core Diameter | 9.0 ± 0.4 µm | Standard SMF core compatible with G.652D splicing |
| Cladding Diameter | 125.0 ± 0.7 µm | Standard 125 µm glass cladding |
| Coating Diameter | 245 ± 5 µm (standard) / 200 ± 5 µm (reduced) | Dual-layer UV-cured acrylate coating; reduced coating available for tight-buffer designs |
| Attenuation | ≤ 0.40 dB/km @ 1310 nm; ≤ 0.30 dB/km @ 1550 nm; ≤ 0.40 dB/km @ 1625 nm | Low attenuation across O, C, and L bands per IEC 60793-2-50 |
| Macrobend Loss (R=5 mm) | ≤ 0.15 dB/turn @ 1550 nm; ≤ 0.45 dB/turn @ 1625 nm | Exceptional bend performance at 5 mm radius — key B3 differentiator |
| Macrobend Loss (R=7.5 mm) | ≤ 0.08 dB/turn @ 1550 nm; ≤ 0.25 dB/turn @ 1625 nm | Suitable for micro-duct, FTTH drop cable, and indoor wiring |
| Numerical Aperture | 0.20 ± 0.02 | Optimized for efficient light coupling and low splice loss with G.652D |
| Zero Dispersion Wavelength | 1300 nm – 1324 nm | Consistent chromatic dispersion performance per ITU-T G.657B3 |
| Proof Test Level | ≥ 100 kpsi (0.69 GPa) | Standard screening; 200 kpsi available upon request for harsh environments |
| Operating Temperature | -60°C to +85°C | Wide thermal range suitable for outdoor, industrial, and FTTA applications |
| Application | FTTH/FTTX last-mile, indoor wiring, micro-duct, MDU, data center, 5G fronthaul | Ideal wherever tight bends, small conduits, or space-constrained routing is required |
| Certification | RoHS, REACH, UL (cable-level), CE; available with TÜV and Telcordia GR-20 | |
| Packaging | Supplied on wooden or plastic reels; standard lengths 2.2 km, 4.4 km, or custom | Reel labeling includes fiber type, length, attenuation, and batch traceability |
| MOQ | 1 reel (≥ 2.2 km); bulk orders ≥ 50 km for preferential pricing | OEM and private-label options available for cable manufacturers |
Initial documentation gap resolved after follow-up
Ordered 25,000 meters of G657B3 for an in-building riser project in New York. Fiber specs were accurate — cutoff wavelength at 1251nm and macrobend loss at 10mm radius measuring 0.022 dB/turn at 1550nm, both compliant with ITU-T G.657.B3. However, the initial shipment arrived without individual reel test certificates, only a batch summary, which didn't meet our project documentation requirements. After contacting support, reel-level reports were provided within 48 hours and the issue was fully resolved. Quality of the fiber itself was not in question. Supplier has since confirmed reel-by-reel documentation is now standard procedure.
Ordered 25,000 meters of G657B3 for an in-building riser project in New York. Fiber specs were accurate — cutoff wavelength at 1251nm and macrobend loss at 10mm radius measuring 0.022 dB/turn at 1550nm, both compliant with ITU-T G.657.B3. However, the initial shipment arrived without individual reel test certificates, only a batch summary, which didn't meet our project documentation requirements. After contacting support, reel-level reports were provided within 48 hours and the issue was fully resolved. Quality of the fiber itself was not in question. Supplier has since confirmed reel-by-reel documentation is now standard procedure.
