TWENTSCHE Liangrui® G.657.A1 single-mode optical fiber

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TWENTSCHE Liangrui®+ G.657.A1 single-mode optical fiber

Liangrui®+ single-mode fiber, based on an optimized refractive index profile design, meets or exceeds the ITU-T G.657.A1 and IEC 60793-2-50 B6.a1 optical fiber specifications, making it suitable for transmission systems in the full 1260nm-1625nm wavelength range.
This full-spectrum fiber features no water peak, low attenuation, low chromatic dispersion, and low polarization mode dispersion (PMD), excellent attenuation uniformity, superior and stable geometric dimensional control, and superior macrobending performance (minimum bend radius of 10mm). Its identical mode field diameter to standard single-mode fiber makes it fully compatible with conventional ITU-T G.652.D and IEC 60793-2-50 B1.3 optical fibers, making it suitable for a variety of optical cable structures.

Size:	25.2KM/ROLL 50.4KM/ROLL Other
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Model:
G.657.A1

Property	Condition	Specification Data	Unit
Optical Performance
Attenuation Coefficient	1310 nm	≤ 0.34	dB/km
	1285–1330 nm	≤ 0.37	dB/km
	1383 nm (after hydrogen aging)	≤ 0.31	dB/km
	1490 nm	≤ 0.23	dB/km
	1550 nm	≤ 0.20	dB/km
	1525–1575 nm	≤ 0.21	dB/km
	1625 nm	≤ 0.22	dB/km
Mode Field Diameter (MFD)	1310 nm	9.0 ± 0.3	μm
Mode Field Diameter (MFD)	1550 nm	10.2 ± 0.4	μm
Cut off Wavelength
cabled cut off wavelength		≤ 1260	nm
Dispersion
Zero Dispersion Wavelength		1300–1324	nm
Zero Dispersion Slope		≤ 0.080	ps/nm²·km
Dispersion Coefficient	1285–1330 nm	≤ [3]	ps/nm·km
	1550 nm	≤ 17	ps/nm·km
	1625 nm	≤ 21	ps/nm·km
Polarization Mode Dispersion (PMD)
PMD Coefficient	Uncabled fiber	≤ 0.10	ps/√km
PMD Coefficient	PMD link design value	≤ 0.08	ps/√km
Point Discontinuity	1310 nm	≤ 0.05	dB
Point Discontinuity	1550 nm	≤ 0.05	dB
Effective Group Refractive Index	1310 nm	1.4671
	1550 nm	1.4675
	1625 nm	1.4680
Geometric Properties
Core Non-Circularity		≤ 6	%
Cladding Diameter		125.0 ± 0.5	μm
Core/Cladding Concentricity Error		≤ 0.4	μm
Cladding Non-Circularity		≤ 0.6	%
Coating Diameter		242 ± 5	μm
Cladding/Coating Concentricity Error		≤ 8	μm
Mechanical Properties
Proof Test	Fiber strain	≥ 1	%
	Fiber load	≥ 9	N
	Stress	≥ 100	kpsi
Dynamic Fatigue Parameter nd	Before aging	≥ 20
Dynamic Fatigue Parameter nd	After aging (85°C, 85% RH, 30 days)	≥ 20
Bend Sensitivity	15mm radius, 10 turns, 1550 nm	≤ 0.25	dB
	15mm radius, 10 turns, 1625 nm	≤ 1.0	dB
	10mm radius, 1 turn, 1550 nm	≤ 0.75	dB
	10mm radius, 1 turn, 1625 nm	≤ 1.5	dB
Coating Strip Force	Peak	1.3 – 8.9	N
Fiber Curvature Radius		≥ 4	m
Environmental Performance
Damp Heat (85°C, 85% RH, 30 days)	Additional attenuation (1310 nm & 1550 nm)	≤ 0.05	dB/km
Dry Heat (85°C, 30 days)	Additional attenuation (1310 nm & 1550 nm)	≤ 0.05	dB/km
Temperature Cycle (–60°C to +85°C)	Additional attenuation (1310 nm & 1550 nm)	≤ 0.05	dB/km
Water Immersion (23°C, 30 days)	Additional attenuation (1310 nm & 1550 nm)	≤ 0.05	dB/km