G.652D+G.657A1 Single mode optic fiber
G.652D+G.657A1 Single mode optic fiber
G.652D+G.657A1 Single mode optic fiber
G.652D+G.657A1 Single mode optic fiber
G.652D+G.657A1 Single mode optic fiber
G.652D+G.657A1 Single mode optic fiber
Single-Mode Optical Fiber G652D+G657A1

Item specifics

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




Low loss Bending-insensitive compatible Single-mode Fiber ( G.652D-LLBI )


The fiber complie with or exceed the technical specifications in ITU-T G.652.D /G657.A

  • Superior anti-bending property.
  • Reducing significantly the attenuation of the 1260~1625nm full band 
  • Fully compatible with G.652 single-mode fiber. Full band (1260~1626 nm) 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, including ribbon, loose tube stranded, slotted core, central tube, tight buffered designs, FTTH high speed optical routing, optical cable in small bend radius, small-size optical fiber cable and device.   

Technical Specifications








Dimensional Specifications

Cladding Diameter

125.0±0.7 um

Cladding Non-Circularity


Coating Diameter

242±5 um

Coating-Cladding Concentricity

≤12 um

Coating Non-Circularity

≤6 %

Core-Clad Concentricity

≤0.5 um

Fiber Curl (radius)

≥4 m

Delivery Length

2.05-50.4( km/reel)







Optical Specifications

Mode-Field Diameter (MFD)


9.2±0.4 um


10.4±0.5 um






≤0.32 dB / km


≤0.32 dB / km


≤0.18 dB / km


≤0.20 dB / km


Attenuation VS. Wavelength

@1285-1330nm, Ref. λ@1310nm

≤0.03dB / km

@1525-1575nm, Ref. λ@1550nm

≤0.02dB / km


Point Discontinuity


≤0.05 dB


≤0.05 dB


Polarization Mode DispersionPMD

Maximum Individual Fiber PMD

≤0.1 ps/(km1/2)

PMD Link Design Value

M=20, Q=0.01%

≤0.06 ps/(km1/2)

Typical Value

0.04 ps/(km1/2)

Zero Dispersion Wavelength(λ0)

1312±12 nm

Zero Dispersion Slope(S0)

≤0.092 ps/(nm2.km)




≤18 ps/(nm.km)


≤22 ps/(nm.km)

Cable Cutoff Wavelength λcc

≤1260 nm





Mechanical  Specifications

Proof Test

≥9.0N, ≥1.0%, ≥100Kpsi

Dynamic stress corrosion susceptibility parameters Nd



Coating Strip Force


1.5 N


1.3-8.9 N


Macrobend Loss

1 turn, Φ20mm@1550nm&1625nm

≤0.5 dB≤1.5 dB

10 turns, Φ30mm@1550nm&1625nm

≤0.05 dB≤0.3 dB




Environmental Specifications

Temperature Dependence-60to 85,@1310nm&1550nm&1625nm

≤0.05 dB / km

Temperature humidity cycling-10to 85,98%RH@1550nm&1625nm

≤0.05 dB / km

Water Immersion23±2, 30 days@1310nm&1550nm&1625nm

≤0.05 dB / km

Dry Heat Soak85±2, 30 days@1310nm&1550nm&1625nm

≤0.05 dB / km

Damp Heat85±2, at 85%RH, 30 days @1310nm&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
  • Ø   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.

    Ø   The packaged optical fiber is stored at a constant temperature of 25 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.