Single-Mode G657A1 Optical Fiber
Products Description
Bend Insensitive Single-mode Optical Fiber （G.657.A1）
Applications of Single-Mode G657A1 Optical Fiber
All cable constructions, 1260～1626nm full band transmission, FTTH high speed optical routing, optical cable in small bend radius, small-size optical fiber cable and device, L-band.
Applicable to various structures of optical cables, FTTH high-speed optical routing, optical cables with small bending radius requirements, optical fiber devices, etc.
G.657.A1 vs G.652.D
A key difference between G.657.A1 and G.652.D is the minimum bend radius a cable can be bent without the cable causing a network to experience failures.
G.657.A1 has a bend radius of 10mm without impacting performance. Whereas G.652.D has a larger minimum bend radius of 30mm.
Note these bend radius are for single singlemode cables in the initial manufactured form with just their primary buffered coating and before they are given outer sheaths or put into multicore constructions as these changes to the cable will also affect the minimum bend radius.
As such, thicker sheath cables or larger multicore cable constructions typically do not use G657.A1 or A2 cores as the limiting factor on the bend radius is the physical limitations of the cable construction and not the glass core.
The G.657.A1 compliant fibers are compatible with installed networks and offer optimized bending properties. With lowest attenuation, perfect fiber geometry and tight fiber diameter tolerances, they are perfectly suited for the system demands in LAN networks.
According to the principle of compatibility with G.652 fiber, G.657 fiber is divided into A and B fiber. At the same time, according to the principle of minimum bend radius, the bending grade is divided into Two grades, 1 and 2 .
G.657.A1 fiber bending resistance characteristics
Compared with other single-mode fibers, the most notable feature of G.657 fiber is that it is not sensitive to bending. This means that the bending loss of G.657 fiber is relatively small. G.657 optical fiber has good bending resistance, making it suitable for optical fiber access network, including various wiring in the building where the optical fiber access network terminal is located.
G.657.A1 has a minimum bend radius of 10mm and is fully compatible with G.652 Single-mode Optical Fiber.
Characteristics of Single-Mode G657A1 Optical Fiber
Satisfied and superior to the technical requirement of ITU-T G.652.D/G.657.A1;
Excellent performance of Bending Resistance;
Fully compatible with G.652 single-mode fiber, full-band transmission from 1260nm to 1626nm;
Low PMD meets the needs of high-speed and long-distance transmission;
High anti-fatigue parameters ensure long life under small bending radius;
Technical Specifications
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Attributes |
specification |
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Dimensional Specifications |
Cladding Diameter |
125.0±0.7um |
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Cladding Non-Circularity |
≤1% |
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Coating Diameter |
245±10 um |
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Coating-Cladding Concentricity |
≤12 um |
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Coating Non-Circularity |
≤6 % |
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Core-Clad Concentricity |
≤0.6 um |
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Fiber Curl (radius) |
≥4 m |
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Delivery Length |
2.1-50.4( km/reel) |
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Optical Specifications
Optical Specifications |
Mode-Field Diameter (MFD) |
@1310nm |
9.2±0.4 um |
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@1550nm |
10.4±0.8 um |
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Attenuation |
@1310nm |
≤0.34 dB / km |
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@1383nm |
≤0.34 dB / km |
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@1550nm |
≤0.20 dB / km |
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@1625nm |
≤0.24 dB / km |
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Attenuation VS. Wavelength |
@1285-1330nm, Ref. λ@1310nm |
≤0.04 dB / km |
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@1525-1575nm, Ref. λ@1550nm |
≤0.03 dB / km |
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Point Discontinuity |
@1310nm |
≤0.05 dB |
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@1550nm |
≤0.05 dB |
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Polarization Mode Dispersion（PMD） |
Maximum Individual Fiber PMD |
≤0.2 ps/(km1/2) |
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PMD Link Design Value （M=20, Q=0.01%） |
≤0.1 ps/(km1/2) |
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Typical Value |
0.04 ps/(km1/2) |
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Zero Dispersion Wavelength(λ0) |
1312±12 nm |
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Zero Dispersion Slope(S0) |
≤0.092 ps/(nm2.km) |
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Dispersion in the range of wavelength |
1285～1339nm |
≥-3.5, ≤3.5ps/(nm.km) |
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1271～1360nm |
≥-5.3, ≤5.3 ps/(nm.km) |
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Cable Cutoff Wavelength λcc |
≤1260nm |
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Mechanical Specifications |
Proof Test |
≥9.0N, ≥1.0%, ≥100Kpsi |
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Dynamic stress corrosion susceptibility parameters (Nd) |
≥20 |
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Coating Strip Force |
Average |
1.5N |
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Peak |
1.3-8.9N |
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Macrobend Loss |
100 turns, Φ50mm@1310nm&1550nm |
≤0.05 dB |
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100 turns, Φ60mm@1625nm |
≤0.1 dB |
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Environmental Specifications |
Temperature Dependence（-60℃ to 85℃ ,@1310nm&1550nm&1625nm） |
≤0.05 dB / km |
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Water Immersion（23±2℃, 30 days@1310nm&1550nm&1625nm） |
≤0.05 dB / km |
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Dry Heat Soak（85±2℃, 30 days@1310nm&1550nm&1625nm） |
≤0.05 dB / km |
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Damp Heat（85±2℃, at 85%RH, 30 days @1310nm&1550nm&1625nm） |
≤0.05 dB / km |
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Product Picture
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Why choose us?
- We provide exceptional customer service and support for all of our optical fiber products.
- Our company is in the forefront of Single-Mode G657A1 Optical Fiber industry in terms of financial strength, production scale, technical strength and sales performance.
- Our optical fiber products are designed with simplicity in mind, ensuring ease of installation and use.
- Our company relies on advanced production technology and perfect automatic production and testing equipment to further ensure the quality requirements of our customers' products.
- We have a well-established supply chain for our optical fiber products, ensuring timely delivery.
- The continuous improvement of the company's performance, the improvement of employee's treatment and the guarantee of welfare, all these are due to the high-quality employees.
- We offer transparent pricing and no hidden costs for our optical fiber products.
- We conduct our business with integrity and demonstrate the highest ethical standards in our dealings with customers, suppliers and each other.
- Our company is dedicated to providing excellent customer service and support.
- We will improve and strengthen our core team and further enhance our core competitiveness based on an innovation-driven model that combines national strategy with market demand, independent research and development with results transformation, and international cooperation with independent control.
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