Single Mode Fiber G657A1

G.657.A1, the bending insensitive single-mode optical fiber, not only has good bending resistance, but also has good compatibility with G.652.D. At the same time, it can extend the coverage of the access network and is the best product for optical fiber access.

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Description

Technical Parameters

our company

30+ years

Our factory was found in 1992, first start with coaxial cable which was one of the biggest manufacturers in lin'an city.In year of 2001 started focusing on the production of optical cables.

30+ countries

In year of 2008, set up international sales department and have long-term cooperation with more than 30 countries and have 18 years` rich experience to export cables .

Features

Low loss & bending insensitive
Two optional diameters: 245 μm
Optimized MFD and precise geometric properties
Good compatibility with G.652.D single-mode fiber

Application Scenarios

• Gigabit broadband home & FTTP
• 5G pre-network construction
• Big data center & computer interconnection

Standard Definition: Belongs to the A1 subclass of the ITU-T G.657 optical fiber series; specifically designed to minimize signal loss during bending.
Key Advantage: Compared to standard optical fiber, it maintains signal stability at tighter bend radii and is less prone to connection loss caused by cable bending.
High Compatibility: Can be directly connected and used with traditional G.652.D optical fiber without requiring special equipment, resulting in low installation costs.

Bending radius: The minimum bending radius is typically around 10 mm; the G657A2 variant can achieve 7.5 mm, with minimal additional loss after bending.
Transmission loss: At a wavelength of 1550 nm, the typical attenuation coefficient is approximately 0.22 dB/km, ensuring high transmission efficiency.
Operating wavelength: Covers a broad range from 1260 nm to 1625 nm, making it compatible with various types of communication equipment.

Partner Brands

We manufacture only optical cables, not fibers; the fibers are supplied by the following renowned brands.

ZTT

YOFC

HTGD

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Technical Characteristics

Parameter	conditions	Units	value
Optical
Attenuation	1310nm	dB/km	≤ 0.350
	1383nm	dB/km	≤ 0.350
	1550nm	dB/km	≤ 0.210
	1625nm	dB/km	≤ 0.230
Attenuation vs. Wavelength	1310nm VS. 1285-1330nm	dB/km	≤ 0.04
Attenuation vs. Wavelength	1550nm VS. 1525-1575nm	dB/km	≤ 0.03
Zero Dispersion Wavelength	-	nm	1300 - 1324
Zero Dispersion Slope	-	ps/(nm2·km)	≤ 0.092
Polarization Mode Dispersion	-	ps/√km	≤ 0.2
Cut-off Wavelength λcc(Cable)	-	nm	≤ 1260
Mode Field Diameter (MFD)	1310nm	μm	9.2±0.4
Mode Field Diameter (MFD)	1550nm	μm	10.4±0.5
Attenuation Discontinuity	1310nm	dB	≤ 0.03

	1550nm	dB	≤ 0.05
Geometrical
Cladding Diameter		μm	125±0.7
Cladding Non-Circularity		%	≤ 1.0
Core/Cladding Concentricity Error		μm	≤ 0.5
Coating Diameter (Uncolored)		μm	245±10
Coating/Cladding Concentricity Error		μm	≤12
Curl		m	≥ 4
Environmental (1550nm, 1625nm)
Temperature Cycling	-60℃ to +85℃	dB/km	≤ 0.05
High Temperature & High Humidity	85℃, 85% RH, 30days	dB/km	≤ 0.05
Water Immersion	23℃, 30days	dB/km	≤ 0.05
High Temperature Aging	85℃, 30days	dB/km	≤ 0.05
Mechanical
Proof Stress	-	GPa	0.69
Proof Stress	-	kpsi	100
Coating Strip Force *	Peak	N	1.3 - 8.9
Coating Strip Force *	Average	N	1.0 - 5.0
Tensile Strength	Fk=50%	GPa	≥ 4.00
Tensile Strength	Fk=15%	GPa	≥ 3.20
Dynamic Fatigue (Nd)	-	-	≥ 20
Macrobending Loss
Ø30mm×10t	1550nm	dB	≤ 0.25
Ø30mm×10t	1625nm	dB	≤ 1.0
Ø20mm×1t	1550nm	dB	≤ 0.75
Ø20mm×1t	1625nm	dB	≤ 1.5
* The peak peel force of the coating is 0.6-8.9N, and the average value is 0.6-5.0N when the coating diameter is 200±10.