ZTO Plus Bending Insensitive Single-mode Fiber G.657.A2

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ZTO Plus bending insensitive single-mode fibre optic combines two attractive features: excellent low macro-bending sensitivity and low water-peak level. It is comprehensively optimized for use in O-E-S-C-L band (1260 -1625 nm). The Plus’s bending insensitive feature not only guarantees L-band applications but also allows for easy installation without excessive care when storing the fibre especially for FTTH networks application. Bending radii in fibre guidance ports can be reduced as well as minimum bend radii in wall and corner mountings.


Optical Characteristics

CharacteristicsConditionsSpecified valuesUnits
Attenuation1383nm(after H2-aging)≤0.35[dB/km]
Attenuation vs. Wavelength
Max. α difference
1285-1330nm, in reference to 1310nm≤0.03[dB/km]
Attenuation vs. Wavelength
Max. α difference
1525-1575nm, in reference to 1550nm≤0.02[dB/km]
Zero Dispersion Wavelength(λ0)1300-1324[nm]
Zero Dispersion Slope(S0)≤0.092[ps/(nm2·km)]
PMD / Maximum Individual Fibre≤0.1[ps/√km]
PMD / Link Design Value(M=20,Q=0.01%)≤0.06[ps/√km]
PMD / Typical Value0.04[ps/√km]
Cable Cutoff Wavelength (λCC)≤1260[nm]
Mode Field Diameter(MFD)1310nm8.4-9.2[μm]
Mode Field Diameter(MFD)1550nm9.3-10.3[μm]
Effective Group Index of Refraction(Neff )1310nm1.466
Effective Group Index of Refraction(Neff )1550nm1.467
Point Discontinuities1310nm≤0.05[dB]
Point Discontinuities1550nm≤0.05[dB]

Geometrical Characteristics

Characteristics Specified values Units
Cladding Diameter125.0±0.7[μm]
Cladding Non-Circularity≤0.7[%]
Coating Diameter235-245[μm]
Coating-Cladding Concentricity Error≤12.0[μm]
Coating Non-Circularity≤6.0[%]
Core-Cladding Concentricity Error≤0.5[μm]
Delivery LengthUp to 50.4[km/reel]

Environmental Characteristics ( 1310nm, 1550nm & 1625nm )

CharacteristicsConditionsSpecified valuesUnits
Temperature Dependence Induced Attenuation-60℃ to +85℃≤0.05[dB/km]
Temperature-Humidity Cycling Induced Attenuation-10°C to +85°C, 98% RH≤0.05[dB/km]
Watersoak Dependence Induced Attenuation23°C, for 30 days≤0.05[dB/km]
Damp Heat Dependence Induced Attenuation85°C and 85% RH, for 30 days≤0.05[dB/km]
Dry Heat Aging85℃, for 30 days≤0.05[dB/km]

Mechanical Specification

CharacteristicsConditionsSpecified valuesUnits
Proof Test≥9.0[N]
Proof Test≥1.0[%]
Proof Test≥100[kpsi]
Macro-bend Induced Attenuation
10 Turns Around a Mandrel of 15 mm Radius1550nm≤0.03[dB]
10 Turns Around a Mandrel of 15 mm Radius1625nm≤0.1[dB]
1 Turn Around a Mandrel of 10 mm Radius1550nm≤0.1[dB]
1 Turn Around a Mandrel of 10 mm Radius1625nm≤0.2[dB]
1 Turn Around a Mandrel of 7.5 mm Radius1550nm≤0.5[dB]
1 Turn Around a Mandrel of 7.5 mm Radius1625nm≤1.0[dB]
Coating Strip Forcetypical average force1.5[N]
Coating Strip Forcepeak force1.3-8.9[N]
Dynamic Fatigue Parameter(nd)≥20


  • All types of fibre cables with different structures
  • High performance optical network operating in O-E-S-C-L band
  • High speed optical routes for Fibre-to-the-Home networks
  • Cables with extreme low bending requirements
  • Cables with extreme low bending requirements


  • Extremely high bending loss resistance in the 7.5 to 15 mm bending radius range
  • Full compatibility with all G.652 fibres for any applications
  • Low attenuation satisfying the operation demand in O-E-S-C-L band
  • Low PMD satisfying high bit-rate and long distance transmission requirements
  • Low bending loss for highly demanding cable designs including ribbons
  • Accurate geometrical parameters that insure low splicing loss and high splicing efficiency
  • High nd-value satisfying long operational lifetime in minimum bend radius


  • ZTO Plus bending insensitive single mode fibre meets or exceeds the ITU-T 
  • Recommendation G.652.D/G.657.A1/G.657.A2/G.657.B2 including the IEC 60793-2-50 type 
  • B1.3/B6.a1/B6.a2/B6.b2 Optical Fibre Specification.

For specific data sheet, please write to info@ztocable.com, whatsapp+86 15802524130 Or click here!