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G.657.A1 optic fiber | Product Standards
G.657.A1 communication optical fiber has a small bending radius, usually as low as about 10 mm, which makes it very suitable for wiring environments that require high bending and can adapt to complex installation paths while maintaining signal quality. The optical fiber meets the requirements of ITU-T G.657.A1/A2/B2 optical fiber technical specifications.
G.657.A1 optic fiber | Product Features
1. Fiber core structure: G657A1 adopts a single-core design to transmit optical signals in a centralized manner, effectively improving transmission efficiency and quality.
2. Bending resistance: In complex wiring or high-flexibility application scenarios, G657A1 optical fiber still maintains good transmission performance at a small bending radius.
3. Attenuation coefficient: A low attenuation coefficient means that the signal is less lost during transmission and maintains a high signal strength.
G.657.A1 optic fiber | Structure Parameters
|
|
Category
|
Parameter
|
Condition
|
Value
|
Unit
|
Optical
|
Attenuation
|
1310nm
|
≤0.35
|
dB/km
|
|
1383nm（Hydrogen-aged）
|
≤0.35
|
dB/km
|
1460nm
|
≤0.25
|
dB/km
|
1490nm
|
≤0.23
|
dB/km
|
1550nm
|
≤0.21
|
dB/km
|
1625nm
|
≤0.23
|
dB/km
|
Attenuation Variation
|
1310nm（1285-1330nm）
|
≤0.03
|
dB/km
|
1550nm（1525-1575nm）
|
≤0.02
|
dB/km
|
Zero Dispersion Wavelength
|
-
|
1300~1324
|
nm
|
Zero Dispersion Slope
|
-
|
≤0.092
|
ps/nm²·km
|
Typical ZDS
|
-
|
0.086
|
ps/nm²·km
|
Typical ZDS
|
-
|
0.086
|
ps/nm²·km
|
Link Value（M=20, Q=0.01%）
|
≤0.1
|
ps/√km
|
Typical Value
|
0.04
|
ps/√km
|
Cable Cutoff Wavelength
|
-
|
≤1260
|
nm
|
MFD
|
1310nm
|
8.4~9.2
|
μm
|
|
1550nm
|
9.3~10.3
|
μm
|
Effective Group Index
|
1310nm
|
1.466
|
-
|
1550nm
|
1.467
|
-
|
Attenuation Discontinuity
|
1310nm
|
≤0.05
|
dB
|
1550nm
|
≤0.05
|
dB
|
Geometric
|
Cladding Diameter
|
-
|
125.0±0.7
|
μm
|
Cladding Non-Circularity
|
-
|
≤0.7
|
%
|
Coating Diameter
|
-
|
245±5
|
μm
|
Coating/Cladding Concentricity
|
-
|
≤12.0
|
μm
|
Coating Non-Circularity
|
-
|
≤6.0
|
%
|
Core/Cladding Concentricity
|
-
|
≤0.5
|
μm
|
Curvature Radius
|
-
|
≥4
|
m
|
Curvature Radius
|
-
|
≥4
|
m
|
Environmental
|
Temperature-Induced Attenuation
|
-60℃ to +85℃
|
≤0.05
|
dB/km
|
Temp-Humidity Cycle Attenuation
|
-10℃ to -85℃, 98% RH
|
≤0.05
|
dB/km
|
Water Immersion Attenuation
|
23℃, 30 days
|
≤0.05
|
dB/km
|
Damp Heat Attenuation
|
85℃ & 85% RH, 30 days
|
≤0.05
|
dB/km
|
Dry Heat Aging
|
85℃, 30 days
|
≤0.05
|
dB/km
|
Mechanical
|
Proof Test
|
Offline
|
≥9.0（Tension）
|
N
|
|
≥1.0（Strain）
|
%
|
≥100（Stress）
|
kpsi
|
Coating Strip Force
|
Average（Typical）
|
1.7
|
N
|
Peak
|
1.3~8.9
|
N
|
Macro-Bend Loss
|
15mm Radius, 10 Turns
|
1550nm
|
≤0.25
|
dB
|
1625nm
|
≤1.0
|
dB
|
10mm Radius, 1 Turn
|
1550nm
|
≤0.75
|
dB
|
1625nm
|
≤1.5
|
dB
|
