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Tight-buffered Fiber
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Applications
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Tight-buffered fiber is the basic
element of various indoor cables. The indoor cables made out of
tight-buffered fibers with different buffer materials can meet
different mechanical and environmental requirements, for example,
big tensile (crush), high/low temperature, frequent bends, low
smoke, no halogen, environmental, field, distribution (frame),
generic use etc
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Tight-buffered fibers with
different buffer can also be used as pigtails directly, or used as
connectors of various optical active and passive devices and
instruments and terminal units.
Features
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Good mechanical and environmental
characteristics;
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The strippability
characteristics of buffer meet the relevant standards or customer
requirements
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Meet various requirements of market and customers.
Dimensional Specifications of Single Mode Fiber
|
Fiber
Type |
Mode Field Dia.
(μm) |
Cladding Dia.
(μm) |
Cladding
Non-
Circularity
(℅) |
Mode Field
Conc. Error
(μm) |
Coat Dia. (μm) |
Cladding/
Coating
Conc. Error
(μm) |
|
At 1310nm |
At 1550nm |
|
Nominal
(μm) |
Tolerance
(μm) |
Nominal
(μm) |
Tolerance
(μm) |
Nominal
(μm) |
Tolerance
(μm) |
Nominal
(μm) |
Tolerance
(μm) |
|
B1.1 |
8.6~9.5 |
±0.5 |
TBD |
±0.5 |
125.0 |
±0.5 |
<1.0 |
≤1.0 |
245 |
±10 |
≤12.5 |
|
B1.3 |
8.6~9.5 |
±0.5 |
TBD |
±0.5 |
125.0 |
±0.5 |
<1.0 |
≤1.0 |
245 |
±10 |
≤12.5 |
|
B4 |
/ |
/ |
8.0~11.0 |
±0.5 |
125.0 |
±0.5 |
<1.0 |
≤1.0 |
245 |
±10 |
≤12.5 |
|
Note: 1 All the values in the
table, which are for reference only, are subject to change
without notice;
2 B1.1series
and B1.3 series are common single-mode optical fibers, and B4 is
non-zero dispersion shifted single-mode optical fiber;
3 The tolerance percentage of
mode field diameter is according to the chosen nominal value. |
Attenuation Coefficient of Single Mode Fiber
|
Fiber Type |
B1.1 |
B1.3 |
B4 |
|
Wavelength
(nm) |
1310 |
1550 |
1310 |
1383 |
1550 |
1550 |
|
Attenuation
Coefficient
Max. (dB/km) |
First Class |
0.40 |
0.30 |
0.40 |
0.40 |
0.30 |
0.30 |
|
Second Class |
0.70 |
0.50 |
0.70 |
0.70 |
0.50 |
0.50 |
|
Note: All the values in the
table, which are for reference only, are subject to change
without notice. |
Dimensional Specification of Multimode Fiber
|
Fiber
Type |
Core Dia. (μm) |
Cladding Dia.
(μm) |
Core
Non-circularity
(℅) |
Cladding
Non-circularity
(℅) |
Core/Cladding
Conc. Error
(μm) |
Coat Dia. (μm) |
Cladding/
Coating
Conc. Error (μm) |
|
Nominal |
Tolerance |
Nominal |
Tolerance |
Nominal |
Tolerance |
|
A1a |
50.0 |
±2.5 |
125.0 |
±1.0 |
≤6.0 |
≤2.0 |
≤1.0 |
245 |
±10 |
≤12.5 |
|
A1b |
62.5 |
125.0 |
|
Note: 1 All the values in the
table, which are for reference only, are subject to change
without notice;
2 Usually the coating
diameter is 245µm,
while it can be bigger when a buffer is applied. |
Characteristics at 850nm and 1300nm Wavelength
|
Characteristics |
Only Used at
850nm |
Only Used at
1300nm |
Both used at
850nm and 1300nm |
|
Fiber Type |
A1a |
A1b |
A1a |
A1b |
A1a |
A1b |
|
Wavelength
(nm) |
850 |
1300 |
850 |
1300 |
850 |
1300 |
|
Attenuation
Coefficient
Max. (dB/km) |
3.0 |
3.0 |
0.8 |
0.8 |
2.5 |
0.8 |
3.0 |
0.7 |
|
3.5 |
3.5 |
1.0 |
1.0 |
2.7 |
1.0 |
3.2 |
0.9 |
|
|
|
1.5 |
1.5 |
3.0 |
1.2 |
3.5 |
1.5 |
|
Modal
Bandwidth
Min.
(MHz/km) |
200 |
100 |
200 |
200 |
200 |
400 |
160 |
200 |
|
500 |
200 |
500 |
500 |
200 |
600 |
160 |
500 |
|
800 |
500 |
800 |
800 |
400 |
400 |
200 |
200 |
|
|
800 |
1000 |
1000 |
400 |
600 |
200 |
400 |
|
|
|
1200 |
|
400 |
800 |
200 |
600 |
|
|
|
|
|
400 |
1000 |
250 |
1000 |
|
|
|
|
|
400 |
1200 |
300 |
800 |
|
|
|
|
|
600 |
1000 |
|
|
|
Note: All the values in the
table, which are for reference only, are subject to change
without notice. |
Mechanical and Environmental Characteristics
|
Fiber Type |
Single-mode
Fiber |
Multi-mode
Fiber |
|
Mechanical and
Environmental Characteristics |
B1.1 |
B1.3 |
B4 |
A1a |
A1b |
|
Proof Test (N)
(kpsi) |
≥8.6 |
|
≥100 |
|
Macro-bend
Loss (dB)
1turn,
φ32mm,
@1550
100turns,
φ60mm,
@1550
100turns,
φ75mm,
@850
100turns,
φ75mm,
@1300 |
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