G657A2 Single-Mode Optical Fiber
G657A2 Single-Mode Optical Fiber
G657A2 Single-Mode Optical Fiber
G657A2 Single-Mode Optical Fiber
G657A2 Single-Mode Optical Fiber
G657A2 Single-Mode Optical Fiber
Optical Fiber G.657A2

Item specifics

Fiber Type
Operating Temperature
-40°C to + 70°C
Aerial/Direct Buried/Duct




Bend Insensitive Single-Mode Optical Fiber G.657.A2


The fiber complie with or exceed the technical specifications in ITU-T G.657.A1/A2/B2.

  • Minimum bend radius 7.5mm, superior anti-bending property;
  • Fully compatible with G.652 single-mode fiber. Full band (1260~1626nm) transmission;
  • Low PMD for high bit-rate and long distance transmission. Extremely low micro-bending attenuation, applicable for all optical cable types including ribbons;
  • High anti-fatigue parameter ensures service life under small bending radius.   

All cable constructions, 1260~1626nm full band transmission, FTTH high speed optical routing, optical cable in small bend radius, small-size optical fiber cable and device, L-band.

Technical Specifications
Dimensional SpecificationsCladding Diameter125.0±0.7 um
Cladding Non-Circularity≤0.7%
Coating Diameter243±7 um
Coating-Cladding Concentricity≤10 um
Coating Non-Circularity≤6 %
Core-Clad Concentricity≤0.5 um
Fiber curl (radius)≥4 m
Delivery length2.1-50.4( km/reel)


Mode-Field Diameter (MFD)@1310nm8.6±0.4 um
@1550nm9.8±0.6 um
Attenuation@1310nm≤0.35 dB / km
@1383nm≤0.35 dB / km
@1550nm≤0.21 dB / km
@1625nm≤0.23dB / km
Attenuation VS. Wavelength@1285-1330nm, Ref. λ@1310nm≤0.03 dB / km
@1525-1575nm, Ref. λ@1550nm≤0.02 dB / km
Point Discontinuity@1310nm≤0.04 dB
@1550nm≤0.04 dB
Polarization Mode Dispersion(PMD)Maximum Individual Fiber PMD≤0.1 ps/(km1/2)
PMD Link Design Value
(M=20, Q=0.01%)
≤0.06 ps/(km1/2)
Typical Value0.04 ps/(km1/2)
Zero Dispersion Wavelength(λ0)1312±12 nm
Zero Dispersion slope(S0)≤0.092 ps/(nm2.km)
Dispersion1550nm≤18 ps/(nm.km)
1625nm≤22 ps/(nm.km)
Cable cutoff wavelength λcc≤1260 nm
Mechanical SpecificationsProof test≥9.0N, ≥1.0%, ≥100Kpsi
Dynamic stress corrosion susceptibility parameters Nd≥20
Coating strip forceAverage1.7 N
Peak1.3-8.9 N
Macrobending loss (dB)1 turn, Φ15mm@1550nm&1625nm≤0.5 dB, ≤1 dB
1 turn, Φ20mm@1550nm&1625nm≤0.1 dB, ≤0.2 dB
10turns, Φ30mm@1550nm&1625nm≤0.03 dB, ≤0.1 dB
Environmental SpecificationsTemperature Dependence (-60ºC to +85ºC@1310nm&1550nm&1625nm)≤0.05 dB / km
Temperature Humidity Cycling(-10ºC to +85ºC, at 85%RH@1550nm&1625nm)≤0.05 dB / km
Water Immersion(23±2ºC, 30 days@1550nm&1625nm)≤0.05 dB / km
Dry Heat Soak(85±2ºC, 30 days@1550nm&1625nm)≤0.05 dB / km
Damp Heat(85±2ºC, at 85%RH, 30 days@1550nm&1625nm)≤0.05 dB / km
The company produces and tests optical fiber independently, all qualified fibers meet the requirements of technical specifications.
Packaging and storage
  • Ensure no foreign matter on the reel and fiber surface, wrap it with film and cover, and label fiber coding on the reel and cover respectively.
  • The packaged optical fiber is stored at a constant temperature of 25ºC in a light-proof warehouse. The products are fixed in the carton when they are shipped out of the warehouse. The carton number and fiber coding information are attached to the carton, and the electronic test report is attached to each shipment.