CR Optical Fiber & Cable Technology Co., Ltd

G657.A1 Fiber

Model: G657.A1 Fiber

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.

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DETAILED INTRODUCTION

Bending-loss insensitive single-mode optical fiber is superior to standards of ITU-T Recommendation G.652D/G.657A and IEC International Standard 60973-2-50 B1.3.

The optical fiber perform is manufactured via the advanced VAD process. Due to the advantages of the fiber drawing process and the adopted VAD performs, G.657A1 optical fiber shows perfect refractive index profile，excellent geometrical performance, low bending loss etc.

It completely overcomes the attenuation of water peak at 1383 nm and could operate over the entire waveband from 1260 nm to 1625 nm.

Excellent bending performance, applicable to occasion with special requirement of bending radius.

Completely compatible with existing G.652D.

Accurate geometrical parameter ensures low splicing loss and high splicing

performance.

Excellent PMD performance supports high-speed and long repeater spacing transmission system.

Characteristics	Conditions	Specified Value	Units
Geometrical Characteristics
Cladding Diameter		125±0.7	μm
Cladding Non-circularity		≤0.8	%
Coating Diameter		242±7	μm
Coating-Cladding Concentricity Error		≤12	μm
Coating Diameter		≤3.0	%
Core-Cladding Concentricity Error		≤0.54	μm
Curl		≥4	m
Optical Characteristics
Attenuation	1310nm	≤0.35	dB/km
	1383nm	≤0.33	dB/km
	1550nm	≤0.21	dB/km
	1625nm	≤0.23	dB/km
Zero Dispersion Wavelength		1300-1322	nm
Zero Dispersion Slope		≤0.091	ps/(nm2●km)
Typical Value		≤0.086	ps/(nm2●km)
PMD	Maximum Individual Fiber	≤0.2	ps/√km
	PMD Link (M=20, Q=0.01%)	≤0.1	ps/√km
	Typical Value	≤0.04	ps/√km
Cable Cut-off Wavelength λcc		≤1260	nm
MFD	1310nm	8.6±0.4	μm
MFD	1550nm	9.7±0.6	μm
Effective Group Index of Refraction	1310nm	1.4672
Effective Group Index of Refraction	1550nm	1.4683
Point Discontinuity	1310nm	≤0.04	dB/km
Point Discontinuity	1550nm	≤0.04	dB/km
Environmental Characteristics
Temperature Cycling	-60℃+85℃	≤0.03	dB/km
Temperature Humidity Cycling	85℃、 RH85%、 30 days	≤0.03	dB/km
Water Immersion	23℃、 30 days	≤0.03	dB/km
Dry Heat Aging	85℃、 30 days	≤0.03	dB/km
Mechanical Characteristics
Proof Test		≥1	%
		≥9.1	N
		≥0.73	Gpa
Coating Strip Force	Peak Force	1.3-8.9	N
Coating Strip Force	Typical Value	1.9	N
Dynamic Fatigue Nd		≥20
Macro-bend Induced Attenuation	R15 mm， 1550 nm 10 turns with radius of 15mm at 1550nm	≤0.2	dB
	R15 mm， 1625 nm 10 turns with radius of 15mm at 1550nm	≤0.8	dB
	R10 mm， 1550 nm 1 turn with radius of 10mm at 1550nm	≤0.7	dB
	R10 mm， 1625 nm 1 turn with radius of 10mm at 1625nm	≤1.2	dB
Length per reel		2.1-61	km