Single-mode Optical Fiber G.657.A1

Single-mode Optical Fiber G.657.A1 from Orientalfiber is designed for modern fiber optic networks that require flexibility, stable transmission, and easy installation. As a reliable China manufacturer and supplier, Orientalfiber offers G.657.A1 fiber optimized for O-E-S-C-L band (1260–1625 nm) applications, with strong resistance to bending losses and consistent performance in dense deployment environments such as FTTx and indoor cabling systems.

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Product Description

Our high quality Single-mode Optical Fiber G.657.A1 are all made in China. Orientalfiber is a professional the Single-mode Optical Fiber G.657.A1 manufacturer and supplier in China. You can buy them from our factory. For more information, contact us now.

Single-mode Optical Fiber G.657.A1 is engineered to maintain stable optical performance even under small bending radius conditions. Compared with conventional fibers, it significantly reduces macrobending loss, making it suitable for indoor cabling, access networks, and compact optical distribution systems.

In practical deployment, this fiber is often used in environments where installers face limited space, such as splice closures, distribution boxes, and wall-mounted cabinets. The improved bending tolerance helps reduce installation sensitivity and lowers the risk of performance degradation caused by improper handling.

Key Advantages for Procurement

Reduced Installation Risk

The optimized bending performance of Single-mode Optical Fiber G.657.A1 allows installers to work with tighter bend radii without causing excessive signal loss. This is especially useful in FTTx projects and indoor routing scenarios where space is limited.

Wide Band Compatibility

Supports full O-E-S-C-L band (1260–1625 nm), making it suitable for current and future network upgrades. It ensures compatibility with L-band applications and long-distance transmission requirements.

Lower Total Project Cost

By minimizing bending-related losses and reducing rework during installation, this fiber helps lower overall deployment costs. It also reduces the need for strict handling conditions during cable storage and installation.

Stable Splicing Performance

Accurate geometrical parameters ensure low splicing loss and high efficiency during fiber jointing, which is important for large-scale network construction projects.

Typical Applications

FTTx Access Networks

Single-mode Optical Fiber G.657.A1 is widely used in fiber-to-the-home and fiber-to-the-building deployments, where tight bends and dense routing are common.

Indoor High-speed Optical Cabling

Suitable for high-speed data transmission inside buildings, data centers, and office environments where compact cable management is required.

Specialized Short Pitch Cables

Ideal for cables with strict bending radius requirements, including ribbon cables and micro cables used in complex routing systems.

High-performance Optical Networks

Supports long-distance and high bit-rate transmission with low PMD, ensuring stable performance in backbone and access network layers.

Specifications

Characteristics		Conditions	Specified Values	Units
Optical Characteristics
Attenuation		1310nm	≤0.35	[dB/km]
		1383nm(after H2-aging)	≤0.35	[dB/km]
		1460nm	≤0.25	[dB/km]
		1550nm	≤0.21	[dB/km]
		1625nm	≤0.23	[dB/km]
Attenuation vs. Wavelength Max. α diﬀerence		1285-1330nm, in reference to 1310nm	≤0.03	[dB/km]
Attenuation vs. Wavelength Max. α diﬀerence		1525-1575nm, in reference to 1550nm	≤0.02	[Db/km]
Dispersion Coeﬃcient		1285-1340nm	-3.5 to 3.5	[ps/(nm·km)]
		1550nm	≤18	[ps/(nm·km)]
		1625nm	≤22	[ps/(nm·km)]
Zero Dispersion Wavelength(λ0)		--	1300-1324	[nm]
Zero Dispersion Slope(S0)		--	≤0.092	[ps/(nm2·km)]
Typical Value		--	0.086	[ps/(nm2·km)]
PMD	Maximum Individual Fibre	--	≤0.1	[ps/√km]
	Link Design Value (M=20，Q=0.01%) (M=20，Q=0.01%)	--	≤0.06	[ps/√km]
	Typical Value	--	0.04	[ps/√km]
Cable Cutoﬀ Wavelength (Λcc)		--	≤1260	[nm]
Mode Field Diameter(MFD)		1310nm	8.4-9.2	[μm]
Mode Field Diameter(MFD)		1550nm	9.3-10.3	[μm]
Eﬀective Group Index of Refraction(Neﬀ )		1310nm	1.466	--
Eﬀective Group Index of Refraction(Neﬀ )		1550nm	1.467	--
Point Discontinuities		1310nm	≤0.05	[Db]
Point Discontinuities		1550nm	≤0.05	[Db]
Geometrical Characteristics
Cladding Diameter		--	125.0±0.7	[μm]
Cladding Non-Circularity		--	≤0.7	[%]
Coating Diameter		--	235-245	[μm]
Coating-Cladding Concentricity Error		--	≤12.0	[μm]
Coating Non-Circularity		--	≤6.0	[%]
Core-Cladding Concentricity Error		--	≤0.5	[μm]
Curl(radius)		--	≥4	[m]
Delivery Length		--	Up to 50.4	[km/reel]
Environmental Characteristics		1310nm, 1550nm & 1625nm
Temperature Dependence Induced Attenuation		-60℃ to +85℃	≤0.05	[Db/km]
Temperature-Humidity Cycling Induced Attenuation		-10°C to +85°C, 98% RH	≤0.05	[Db/km]
Watersoak Dependence Induced Attenuation		23°C, for 30 days	≤0.05	[Db/km]
Damp Heat Dependence Induced Attenuation		85°C and 85% RH, for 30 days	≤0.05	[Db/km]
Dry Heat Aging		85℃, for 30 days	≤0.05	[Db/km]
Mechanical Specification
Proof Test		--	≥9.0	[N]
		--	≥1.0	[%]
		--	≥100	[kpsi]
		--	--	--
Macro-bend Induced Loss	10 Turns Around a Mandrel of 15 mm Radius	1550nm	≤0.25	[Db]
	10 Turns Around a Mandrel of 15 mm Radius	1625nm	≤1.0	[Db]
	1 Turn Around a Mandrel of 10 mm Radius	1550nm	≤0.75	[Db]
	1 Turn Around a Mandrel of 10 mm Radius	1625nm	≤1.5	[Db]
Coating Strip Force		typical average force	1.5	[N]
Coating Strip Force		peak force	1.3-8.9	[N]
Dynamic Fatigue Parameter (nd)		--	≥20	--

Single-mode Optical Fiber G.657.A1

Technical Characteristics

Low Attenuation Across Full Band

Maintains stable signal transmission across the O-E-S-C-L wavelength range, supporting multi-band network operation.

Excellent Bending Resistance

Designed to reduce both macro-bending and micro-bending losses, ensuring reliable performance even in tight installation conditions.

Low PMD (Polarization Mode Dispersion)

Meets the requirements of high-speed and long-distance transmission systems, helping maintain signal integrity.

Consistent Geometry

Precision manufacturing ensures uniform fiber dimensions, improving splicing consistency and reducing connection loss.

Standards Compliance

Single-mode Optical Fiber G.657.A1 complies with international standards including ITU-T G.657.A1 and G.652.D, as well as IEC 60793-2-50 Type B1.3/B6.a1 specifications. This ensures compatibility with global network infrastructure requirements.

About the Manufacturer

Jiangsu Xuben Photoelectric Technology Co., Ltd is a group company with four factories, providing complete fiber optic network solutions. The company covers a total area of 15,000 square meters with an annual output value of 20 million USD.

The group includes indoor and outdoor optical cable factories, an ODN component factory, and an optical network equipment factory. Products are widely used in telecommunications, broadcasting systems, LAN data transmission, and industrial applications such as power systems, rail transit, and highways.

With ISO9001 and ISO45001 certifications, the company focuses on refined manufacturing and stable production processes. Its products are exported globally and applied in various medium and large-scale engineering projects.

FAQ

Q1: What is the main difference between G.657.A1 and G.652.D fiber?

Single-mode Optical Fiber G.657.A1 offers better bending performance while maintaining compatibility with G.652.D systems. It is more suitable for installations with tight routing conditions.

Q2: Is this fiber suitable for indoor installations?

Yes, Single-mode Optical Fiber G.657.A1 is specifically designed for indoor and access network use, supporting small bend radius and compact cable layouts.

Q3: Can it be used for long-distance transmission?

Yes, thanks to low attenuation and low PMD, it supports high-speed and long-distance optical communication.

Q4: Is it compatible with existing network infrastructure?

It meets both G.657.A1 and G.652.D standards, ensuring compatibility with most existing optical network systems

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