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Description
Bending insensitive single-mode optical fiber (G.657.A2) bears the entire characteristics of dispersion unshifted single-mode optical fiber and superior bending performance especially. It is applicable to transmission over entire wavelength from 1260nm to 1625nm. Under the condition of long wave band, the bending radius could be as little as 7.5mm with induced attenuation as low as 1dB at 1625nm.
Industry Standard
Yingda Bare optical fiber complies with or exceeds the ITU-T recommendation G.652.D/G.657.A2 and the IEC 60793-2-50 B1.3/B6.a2 optical fiber specifications.
G657A2 Bare Fiber Features
- 657A2 features extremely high bending loss resistance in from 7.5 to 15mm bending radius range.
- 657.A2 completely overcomes the attenuation of water peak at 1383nm and could operate over the entirewavelength from 1260nm to 1625nm.
- 657A2 is completely compatible with existing G.652.D.
- Accurate geometrical parameters ensure low splicing loss and high splicing efficiency.
- Excellent PMD performance supports high-speed and long repeater spacing transmission system.
- Enhanced signal strength, high confidentiality, high stability, and secure transmission. Various specifications and sizes can be customized, from 2km to 50.4km, 60km, and 60.4km/reel, etc.
Bare Optical Fiber G.657A2 Application
- OTDR testing fiber optic cable
- FPV UAV fiber optic communication
- Fiber to the home in residential communities
- Copper shavings equipment room setup
- Monitoring equipment
G657A2 Optical Characteristics
| Characteristics | Unit | Value | |
| Attenuation | 1310nm | dB/km | ≤0.35 |
| 1383nm | dB/km | ≤0.35 | |
| 1550nm | dB/km | ≤0.21 | |
| 1625nm | dB/km | ≤0.24 | |
| Attenuation vs. wavelength | 1285-1330nm vs. 1310nm | dB/km | ≤0.04 |
| 1525-1575nm vs. 1550nm | dB/km | ≤0.03 | |
| Attenuation Discontinuity | 1310nm | dB | ≤0.05 |
| 1550nm | dB | ≤0.05 | |
| Attenuation Nonuniformity | 1310nm | dB | ≤0.05 |
| 1550nm | dB | ≤0.05 | |
| Bidirectional Attenuation | 1310nm | dB | ≤0.05 |
| 1550nm | dB | ≤0.05 | |
| Zero Dispersion Wavelength | nm | 1300-1324 | |
| Zero Dispersion Slope | ps/(nm 2 .km) | ≤0.092 | |
| Maximum PMD of Individual Fiber | ps/(km1/2) | ≤0.2 | |
| Cable Cutoff Wavelength λcc | nm | ≤1260 | |
| Mode Field Diameter | 1310nm | um | 8.6±0.4 |
| Effective Group Refraction Index | 1310nm | 1.467 | |
| 1550nm | 1.468 | ||
Geometrical Characteristics
| Characteristics | Unit | Value |
| Cladding diameter | um | 125±0.7 |
| Core-Cladding Concentricity Error | um | ≤0.5 |
| Cladding Non-Circularity | % | ≤1.0 |
| Coating Diameter
| um | 245±10 |
| Coating Non-Circularity | % | ≤4 |
| Coating-Cladding Concentricity Error | um | 125 |
| Curl | m | ≥4 |
Environmental Characteristics（ 1310nm,1550nm,1625nm）
| Characteristics | Unit | Value | |
| Temperature Cycling | – 60℃ ~ +85℃ | dB/km | ≤0.05 |
| High Temperature & High Humidity | 85℃, RH85%，30 days | dB/km | ≤0.05 |
| Water Immersion | 23℃, 30 days | dB/km | ≤0.05 |
| Dry Heat Aging | 85℃, 30 days | dB/km | ≤0.05 |
Mechanical Characteristics
| Characteristics | Unit | Value | |
| Tensile Proof Test | N | ≥9.0 | |
| % | ≥1.0 | ||
| Kpsi | ≥100 | ||
| Coating Strip Force | Peak Force | N | 1.0-8.9 |
| Typical Value | N | 1.0-5.0 | |
| Tensile Strength | Weibull Probability 50% | Gpa | ≥4.00 |
| Weibull Probability 15% | Gpa | ≥3.20 | |
| Dynamic Fatigue Parameter | / | ≥20 | |
| Macrobending Attenuation | |||
| 15mm radius, 10 turns | 1550nm | dB | ≤0.03 |
| 1625nm | dB | ≤0.1 | |
| 10mm radius, 1 turn | 1550nm | dB | ≤0.1 |
| 1625nm | dB | ≤0.2 | |
| 7.5mm radius, 1turn | 1550nm | dB | ≤0.5 |
| 1625nm | dB | ≤1.0 | |
