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G652D 9/125 Bare Fiber | ITU-T G.652.D Single Mode Bare Optical Fiber
G652D 9/125 bare fiber is a standard single mode optical fiber designed for 1310nm and 1550nm transmission. Featuring low attenuation, full-spectrum performance, and excellent compatibility for FTTH, backbone, patch cord, and optical cable manufacturing applications.
| Parameter | Typical Value | Parameter | Typical Value |
| Operating Wavelength | 1260–1625 nm | Attenuation @1310nm | ≤ 0.35 dB/km |
| Mode Field Diameter @1310nm | 9.2 ± 0.4 μm | Attenuation @1383nm | ≤ 0.32 dB/km |
| Mode Field Diameter @1550nm | 10.4 ± 0.8 μm | Attenuation @1550nm | ≤ 0.21 dB/km |
| Cutoff Wavelength | ≤ 1260 nm | Attenuation @1625nm | ≤ 0.23 dB/km |
| PMD | ≤ 0.2 ps/√km |
- Parameters
| Parameter | Typical Value | Parameter | Typical Value |
| Operating Wavelength | 1260–1625 nm | Attenuation @1310nm | ≤ 0.35 dB/km |
| Mode Field Diameter @1310nm | 9.2 ± 0.4 μm | Attenuation @1383nm | ≤ 0.32 dB/km |
| Mode Field Diameter @1550nm | 10.4 ± 0.8 μm | Attenuation @1550nm | ≤ 0.21 dB/km |
| Cutoff Wavelength | ≤ 1260 nm | Attenuation @1625nm | ≤ 0.23 dB/km |
| PMD | ≤ 0.2 ps/√km |
G652D 9/125 Bare Fiber
G652D 9/125 Bare Fiber is a standard single mode optical fiber designed for long-distance and high-speed optical transmission systems. Compliant with ITU-T G.652.D and IEC 60793-2-50 standards, this fiber is optimized for operation across the full wavelength spectrum from 1260nm to 1625nm, making it one of the most widely used fibers in telecom, FTTH, CATV, data transmission, and optical component manufacturing.
With a 9μm core and 125μm cladding structure, G652D bare fiber provides low attenuation, low splice loss, excellent macro-bending performance, and high compatibility with standard telecom optical systems. It is suitable for optical cable manufacturing, pigtails, patch cords, PLC splitters, FBT couplers, and passive optical network (PON) deployment.
As one of the most common single mode bare fibers in the optical communication industry, G652D 9/125 bare fiber is the preferred choice for reliable signal transmission, stable network deployment, and cost-effective optical connectivity.
Product Features
1. Full-Spectrum Transmission Performance Optimized for operation across the entire transmission window from 1260nm to 1625nm, suitable for: •O-band (1260–1360nm) •E-band (1360–1460nm) •S-band (1460–1530nm) •C-band (1530–1565nm) •L-band (1565–1625nm) | 2. Low Attenuation Provides excellent attenuation performance for long-distance transmission: •Low attenuation at 1310nm •Ultra-low attenuation at 1550nm •Stable signal quality over extended distances | 3. Low Water Peak Performance G652D fiber features low water peak attenuation, enabling full-spectrum wavelength transmission including E-band applications. | 4. Excellent Splicing and Connectorization Designed for low splice loss and high connector consistency, ideal for: •Fusion splicing •Field termination •Pigtail production •Patch cord assembly | 5. High Mechanical Reliability Offers excellent tensile strength, coating stability, and long-term durability for telecom-grade deployment. | 6. Broad Compatibility Fully compatible with: •G652 fibers •G657 fibers •Standard telecom connectors •PLC splitters •FBT couplers •OLT / ONU systems |
Product Applications
G652D 9/125 bare fiber is widely used in telecom and optical passive component manufacturing.
Optical Cable Manufacturing Suitable for: •Indoor optical cables •Outdoor optical cables •ADSS cables •FTTH drop cables •Ribbon cables •Micro cables | FTTH & FTTx Networks Ideal for: •OLT to ONU links •Access networks •Distribution networks •Passive optical networks (PON) | Optical Passive Components Widely used in: •PLC splitters •FBT couplers •Optical attenuators •WDM modules •CWDM / DWDM devices | Patch Cord & Pigtail Production Used for: •Fiber pigtails •Patch cords •Jumper assemblies •Connectorized optical products | Data Transmission Systems Applicable in: •Telecom backbone •Metro transmission •CATV systems •Data center interconnects |
Geometrical & Optical Characteristics
Geometrical Characteristics
| Parameter | Typical Value | Parameter | Typical Value |
| Core Diameter | 9 ± 0.4 μm | Cladding Non-Circularity | ≤ 1.0% |
| Cladding Diameter | 125 ± 0.7 μm | Coating Diameter | 245 ± 10 μm (if coated) |
| Core-Cladding Concentricity Error | ≤ 0.5 μm | Coating Non-Circularity | ≤ 6.0% |
Optical Characteristics
| Parameter | Typical Value | Parameter | Typical Value |
| Operating Wavelength | 1260–1625 nm | Attenuation @1310nm | ≤ 0.35 dB/km |
| Mode Field Diameter @1310nm | 9.2 ± 0.4 μm | Attenuation @1383nm | ≤ 0.32 dB/km |
| Mode Field Diameter @1550nm | 10.4 ± 0.8 μm | Attenuation @1550nm | ≤ 0.21 dB/km |
| Cutoff Wavelength | ≤ 1260 nm | Attenuation @1625nm | ≤ 0.23 dB/km |
| PMD | ≤ 0.2 ps/√km |
Technical Data
| Optical Transmission Data | Mechanical Performance | Environmental Performance | |||||
| Wavelength | Attenuation | Parameter | Value | Test Item | Performance | ||
| 1310 nm | ≤ 0.35 dB/km | Proof Strength | 100 kpsi min | Operating Temperature | -60°C to +85°C | ||
| 1383 nm | ≤ 0.32 dB/km | Tensile Strength | ≥ 0.7 GPa | Storage Temperature | -60°C to +85°C | ||
| 1490 nm | ≤ 0.24 dB/km | Dynamic Bend Radius | ≥ 30 mm | Thermal Cycling Stability | Excellent | ||
| 1550 nm | ≤ 0.21 dB/km | Static Bend Radius | ≥ 15 mm | Humidity Resistance | Excellent | ||
| 1625 nm | ≤ 0.23 dB/km | Long-Term Reliability | High | ||||
Product Advantages
- •Standard telecom-grade single mode bare fiber
- •Full-spectrum low water peak transmission
- •Low attenuation and low splice loss
- •Excellent compatibility with telecom passive components
- •Ideal for FTTH, backbone, and patch cord manufacturing
- •Stable mechanical and optical performance
- •Cost-effective and widely deployable
Product Standards
G652D 9/125 bare fiber is manufactured and tested in strict accordance with international telecom optical fiber standards to ensure stable optical performance, high mechanical reliability, and long-term network compatibility.
Applicable Standards •ITU-T G.652.D – Characteristics of a Single-Mode Optical Fibre and Cable •IEC 60793-2-50 – Product Specifications for Class B Single Mode Fibers •IEC 60793-1 Series – Optical Fibre Measurement Methods •IEC 60794 Series – Optical Cable Test Methods •Telcordia GR-20 – Generic Requirements for Optical Fiber and Cable •RoHS Compliance •REACH Compliance | Quality Assurance Tests •Geometrical Dimension Inspection •Mode Field Diameter Test •Cutoff Wavelength Test •Attenuation Test •Dispersion Test •PMD Test •Proof Test •Environmental Stability Test |
Why Choose HUALUE G652D 9/125 Bare Fiber?
HUALUE is proud to offer premium bare optical fiber backed by advanced international technology. Through deep technical cooperation with FUTONG and the introduction of Sumitomo’s cutting-edge bare fiber manufacturing technology, HUALUE delivers bare fibers with excellent optical performance, high mechanical strength, and superior consistency.
Our state-of-the-art production line ensures a stable monthly output of 50,000 to 60,000 fiber cores. We maintain substantial ready stock of standard specifications (including G.652.D and G.657 series), enabling immediate delivery to meet urgent customer demands.
Whether you need small sample quantities or large-volume orders, HUALUE provides fast, reliable, and cost-effective bare fiber solutions with strict quality control and full traceability.
Choose HUALUE Bare Fiber – Advanced Sumitomo technology, strong production capacity, and ready stock for instant delivery.Our G652D 9/125 bare fiber is manufactured for high-performance telecom transmission and passive optical component applications. With excellent full-spectrum transmission capability, low attenuation, stable geometry, and reliable mechanical performance, it is the ideal choice for cable manufacturers, FTTH deployment, and optical component production.
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