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Hermex Fiber | Optical Fiber Supplier
Ultra-Thin G.657.A2 Micro-Fiber Spools for Extreme Bending & High-EMI Environments
Hermex Fiber supplies G.657.A2 bend-insensitive single-mode optical fiber and micro-fiber spool consumables for tethered robotic systems, high-EMI communication environments, FTTx micro-ducting, and compact optical routing projects.
G657A2
G657A1
G657D
0.245 mm standard coating
0.28 mm micro-spool option
7.5-15 mm bend radius performance
1260-1625 nm transmission
Products
G.657.A2 Bend-Insensitive Micro-Fiber Spools
Hermex Fiber focuses on G.657.A2 bend-insensitive single-mode optical fiber for compact routing, micro-spool consumables, FTTx micro-ducting, indoor cable production, and high-EMI civil communication environments.
Available specifications:
G657A2
G657A1
G657D
Micro-Fiber Spools
0.245 mm standard coating, with 0.28 mm customized micro-spool format available on request.
Custom Spool Lengths
10 km / 20 km / 30 km / 40 km / 50 km packaging options can be discussed for wholesale orders.
Applications
Applications Built for Tight Bending and High-EMI Conditions
Tethered Robotic Systems
For mine inspection robots, pipeline inspection systems, elevated tethered platforms, and civil robotic systems requiring stable wired data transmission.
High-EMI Environment Communications
For physical zero-radio communication links around power-grid facilities, shielded industrial zones, and wireless-failure environments.
High-Density Micro-Ducting for FTTx
For dense FTTH, industrial LAN, and compact duct deployments requiring excellent bending performance down to 7.5 mm radius.
Indoor Optical Cable & Compact Routing
For building cabling, tight installation paths, patch cords, pigtails, and high-density optical assemblies.
Product Specification
G.657.A2 Bend-Insensitive Single-Mode Optical Fiber
Reference specifications for Hermex G.657.A2 optical fiber. Full datasheet, inspection records, and batch details are available for qualified wholesale buyers.
| Category | Parameter | Specification |
|---|---|---|
| Product Type | Fiber Type | G.657.A2 Bend-Insensitive Single-Mode Optical Fiber |
| Product Form | Coating / Micro Fiber | 0.245 mm standard coating; 0.28 mm micro-spool option available on request |
| Standards | Compliance | ITU-T G.657.A2 / G.652.D compatible / IEC 60793-2-50 B6.a2 |
| Wavelength | Operating Range | 1260-1625 nm |
| Attenuation | 1310 nm | ≤ 0.35 dB/km |
| Attenuation | 1383 nm | ≤ 0.35 dB/km |
| Attenuation | 1550 nm | ≤ 0.21 dB/km |
| Attenuation | 1625 nm | ≤ 0.24 dB/km |
| Attenuation vs. Wavelength | 1285-1330 nm vs. 1310 nm | ≤ 0.04 dB/km |
| Attenuation vs. Wavelength | 1525-1575 nm vs. 1550 nm | ≤ 0.03 dB/km |
| Attenuation Discontinuity | 1310 nm / 1550 nm | ≤ 0.05 dB |
| Attenuation Nonuniformity | 1310 nm / 1550 nm | ≤ 0.05 dB/km |
| Bidirectional Attenuation | 1310 nm / 1550 nm | ≤ 0.05 dB/km |
| Dispersion | Zero Dispersion Wavelength | 1300-1324 nm |
| Dispersion | Zero Dispersion Slope | ≤ 0.092 ps/(nm².km) |
| PMD | Maximum PMD of Individual Fiber | ≤ 0.2 ps/√km |
| Cutoff | Cable Cutoff Wavelength λcc | ≤ 1260 nm |
| Optical Geometry | Mode Field Diameter @ 1310 nm | 8.6 ± 0.4 μm |
| Optical Index | Effective Group Refraction Index @ 1310 nm | 1.467 |
| Optical Index | Effective Group Refraction Index @ 1550 nm | 1.468 |
| Geometry | Cladding Diameter | 125 ± 0.7 μm |
| Geometry | Core-Cladding Concentricity Error | ≤ 0.5 μm |
| Geometry | Cladding Non-Circularity | ≤ 1.0% |
| Coating | Coating Diameter | 245 ± 10 μm |
| Coating | Coating Non-Circularity | ≤ 4% |
| Coating | Coating-Cladding Concentricity Error | ≤ 12.5 μm |
| Mechanical | Curl | ≥ 4 m |
| Mechanical | Tensile Proof Test | ≥ 9.0 N / ≥ 1.0% / ≥ 100 kpsi |
| Mechanical | Coating Strip Force | Peak: 1.0-8.9 N; Typical: 1.0-5.0 N |
| Mechanical | Tensile Strength | Weibull 50%: ≥ 4.00 GPa; Weibull 15%: ≥ 3.20 GPa |
| Mechanical | Dynamic Fatigue Parameter | ≥ 20 |
| Macro-Bending | 15 mm radius, 10 turns @ 1550 nm | ≤ 0.03 dB |
| Macro-Bending | 15 mm radius, 10 turns @ 1625 nm | ≤ 0.10 dB |
| Macro-Bending | 10 mm radius, 1 turn @ 1550 nm | ≤ 0.10 dB |
| Macro-Bending | 10 mm radius, 1 turn @ 1625 nm | ≤ 0.20 dB |
| Environment | Temperature Cycling | -60°C to +85°C, ≤ 0.05 dB/km |
| Environment | High Temperature & High Humidity | 85°C, RH85%, 30 days, ≤ 0.05 dB/km |
| Environment | Water Immersion | 23°C, 30 days, ≤ 0.05 dB/km |
| Environment | Dry Heat Aging | 85°C, 30 days, ≤ 0.05 dB/km |
About Us
About Hermex Fiber
Market is the compass, details make the difference.
Hermex Fiber is an optical fiber supplier focused on high-grade single-mode fiber products for compact routing, FTTx networks, industrial communication systems, and high-density optical infrastructure.
Our flagship product, G.657.A2 bend-insensitive single-mode optical fiber, is designed for excellent bending performance, stable attenuation, and compatibility with existing G.652.D optical networks.
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Send your required specification, spool length, quantity, destination country, and application. Hermex Fiber will respond with datasheet, pricing, and sample options.