250μm Single Mode Optical Fiber Optic G657A2 Bare Fiber 50.4km/Spool Natural Color

Product Description

ITU-T G652D/ G657A1/ G657A2 Single-Mode Optical Fiber 9/125μm for Communication

Factory Direct Supply

SM Fiber Model: G652D, G657A1, G657A2

Standard Reel Length: 24.4km, 48.8km, 50.4km

Fiber Color: Natural or Colored (12 colors)

Attenuation: @1310nm ≤0.35dB/km; @1550nm≤0.21dB/km

Package: plastic reels packed in carton box
Annual output: 15,000,000 kilometers

Production lines: 9 Fiber Drawing Towers (totally 18 production lines)

G652.D

G657.A1

G657.A2

Low Water Peak Non-Dispersion Shifted Single-Mode Optical Fiber

G652.D single-mode fiber is a high-performance, cost-effective, and versatile solution for modern optical communication networks. It includes a wide wavelength window (1260–1625 nm), low attenuation (in 1550nm band), stable dispersion, and strong mechanical reliability. It is widely used in 5G, DCI, metro/long-haul backbone, and FTTx systems.

Bending Insensitive Single-Mode Optical Fiber

G657.A1 Bending-loss insensitive single-mode optical fiber bears the entire characteristics of non-dispersion shifted single-mode optical fiber and  superior bending performance, which is applicable to transmission over entire wavelength from 1260 nm to 1625 nm. Under the condition of long wave band, the bending radius could be as small as 10mm.

Bending Insensitive Single-Mode Optical Fiber

G657.A2 bears the entire characteristics of non-dispersion shifted single-mode optical fiber and superior bending performance, which is applicable to transmission over entire wavelength from 1260nm to 1625nm. It has low macro-bending loss and even with the bending radius of 7.5mm,and the macro-bending loss at 1625nm is only 0.8 dB.

Specification

The single-mode fiber cross-section follows a three-layer design, as shown below:

Layer	Composition	Diameter	Function
Core	High-purity silica (SiO2) doped with germanium (GeO2)	9 μm	Transmits the main optical signal; germanium doping increases refractive index to confine light.
Cladding	Pure silica (SiO2)	125 μm	Has a lower refractive index than the core, forming a "light trap" via total internal reflection.
Coating	UV-cured acrylate polymer	250 μm	Protects the fiber from mechanical damage (e.g., scratches) and moisture; provides flexibility.

Technical Parameters :

Model			G652.D	G657.A1	G657.A2
Characteristics		Unit	Value	Value	Value
Geometrical	Cladding Diameter	μm	125.0±0.7	125.0±0.7	125.0±0.7
	Cladding Non-circularity	%	≤1.0	≤1.0	≤1.0
	Core-Cladding Concentricity Error	μm	≤0.6	≤0.5	≤0.5
	Coating Non-circularity	%	≤6.0	≤6.0	≤6.0
	Coating Diameter	μm	243±5.0	243±5.0	243±5.0
	Coating-Cladding Concentricity Error	μm	≤12	≤10	≤12
	CurlRadius	m	≥4	≥4	≥4
Attenuation	1310nm	dB/km	≤0.35	≤0.35	≤0.35
	1383nm	dB/km	≤0.33	≤0.33	≤0.33
	1550nm	dB/km	≤0.21	≤0.21	≤0.21
	1625nm	dB/km	≤0.24	≤0.23	≤0.23
MFD	1310nm	μm	9.1±0.4	8.8±0.4	8.6±0.4
	1550nm	μm	10.4±0.5	9.7±0.6	9.7±0.6
Fiber Cut-off Wavelength λcc		nm	1180-1330	1180-1330	1180-1330

Item	Fiber Type	Conditions	Unit	Standard Value
Macro-bending Loss	G652.D	(100 turns; diameter 60 mm) @1625 nm	dB	≤0.05
	G657.A1	(10 turns; diameter 30 mm) @1550 nm	dB	≤0.25
		(10 turns; diameter 30 mm) @1625 nm	dB	≤1.0
		(1 turns; diameter 20 mm) @1550 nm	dB	≤0.75
		(1 turns; diameter 20 mm) @1625 nm	dB	≤1.5
	G657.A2	(10 turns; diameter 30 mm) @1550 nm	dB	≤0.03
		(10 turns; diameter 30 mm) @1625 nm	dB	≤0.1
		(1 turns; diameter 20 mm) @1550 nm	dB	≤0.1
		(1 turns; diameter 20 mm) @1625 nm	dB	≤0.2
		(1 turns; diameter 15 mm) @1550 nm	dB	≤0.5
		(1 turns; diameter 15 mm) @1625 nm	dB	≤1.0

Environmental Performance
Characteristics	Conditions	Unit	Standard Value
Temperature Cycling	-60℃ ~+85℃	dB/km	≤0.05
Damp Heat Aging	85℃, RH 85%, 30 Days	dB/km	≤0.05
Water Immersion	23℃, 30 Days	dB/km	≤0.05
Dry Heat Aging	85℃, 30 Days	dB/km	≤0.05

Colored Single Mode Fiber
1	2	3	4	5	6
Blue	Orange	Green	Brown	Grey	White
7	8	9	10	11	12
Red	Black	Yellow	Violet	Pink	Aqua

Packing & Delivery

Company Profile

Anhui Changrong Optical Fiber & Cable Technology Co.,Ltd. located in Chuzhou, near Nanjing, which is belong to the Yangtse River Delta Ecomomic Circle, is a professional manufacturer of optical fiber and cables. It 's establish in 2017 with a covering area of 230,000 m².

We have 18 cutting-edge fiber drawing lines for single mode optical fiber production, with annual output 15,000,000 core kilometers;

Meanwhile 18 production lines for outdoor optical fiber cables, including ADSS, Drop, FIG8, Aerial Fiber Cable, Direct Buried Fiber Cable, Duct Fiber Cable, Air-blown Cable, etc.

What's more, we own advanced labs with full sets of quality control equipment introduced from United States, France & Germany.

Our optical fiber cables have been widely applied in domestic market like China Mobile, China Unicom, China Telecom, etc. and exported to overseas market like Latin America, Africa, Southeast Asia, etc.

Optical Fiber Workshop

Optical Fiber Cable Workshop

Optical Fiber Cable Testing

9 Cutting-edge Fiber Drawing Towers;

18 Fiber Drawing Production Lines;

15 Million Kilometers Annual Output;

Advanced Fiber Testing Equipment: Optical, Geometrical, Mechanical and Environmental Performance

18 Cable Production Lines:

ADSS Fiber Optic Cable;

Figure 8 Aerial Self-support Fiber Cable;

Underground Duct/ Direct Buried Fiber Cable;

FTTH Drop Cable;

Air-Blown Microduct Cable;

CNAS Certified Testing Center:

Rigorous Quality Control under ISO9001 and Industrial Standards;

Full sets of Optical Cable Mechanical Performance Testing: Tensile Test, Bending Test, Impact Test, Torsion Test, Crush Test, etc.

1. Totally 18 Optical Cable Production Lines, able to manufacture bulk orders with prompt delivery.
2. Reliable Technical Support, meet the needs of different structure design and technical requirements.
3. Totally 18 Optical Fiber Production Lines, with annual output 15 million kilometers, able to produce A-grade Single Mode Fibers with high speed.
4. Own laboratory with full sets of advanced testing equipment, strict quality control under ISO9001 management system, industrial and international standards IEC60794-1.
5. Supply OEM/ ODM service.

1.Are you the real factory?
Yes. We are the real factory located in Chuzhou city, Anhui Porvince, China. Welcome to go to the factory tour!

2.What is your fiber brand ?
We have our own fiber production lines and the preforms are from YOFC, FIBERHOME.  
3.Can you accept small order?
Yes, small order is available .We support new project of our customers as we know business is always from small order. 
4.What is your warranty period?
25 years for fiber optic cable 
5.Do you have certificate?
ISO9001, ISO14001, ISO45001, TLC, CNAS
6.What is your delivery time? 
Usually within 15 working days
7.What about your annual production capacity?
Outdoor Fiber Optic Cable:  350,000 KM per year;
FTTH Drop Cable: 200,000 KM per year;  

Optical fibers: 15,000,000 KM per year;
8.What is your payment way?
 T/T, L/C, Western Union and Paypal. 
9.Can you supply customized products and logo?
Yes. We supply OEM&ODM service. You can send us your drawing.

10.Shipping and Delivery

For large orders: by sea (LCL or FCL)

For small orders: by sea (LCL), by air or by courier service