OPTOKON

Single Mode Fiber G.657.A2

Rev. 014-21/1

Fiber type

G.657.A2

OPK code

A2

Core

Germanium doped silica

Cladding

Silica, step index and matched clad type

Coating

Dual layers of UV-cured acrylate

 

 

Optical Characteristics

 

Attenuation coefficient Loose tube Cables

 

at 1310 nm

≤ 0.36 dB/km

at 1550 nm

≤ 0.24 dB/km

at 1625 nm

≤ 0.26 dB/km

Attenuation coefficient Tight Buffered Cables1

 

at 1310 nm

≤ 0.40 dB/km

at 1550 nm

≤ 0.40 dB/km

Point of discontinuity  at 1310 nm and 1550 nm

≤ 0.1 dB

Cable cut-off wavelength (λcc)

≤ 1260 nm

Zero dispersion wavelength

1300 – 1324 nm

Zero dispersion slope

≤ 0.092 (ps/(nm2/km )

Maximum individual fiber PMD

≤ 0.10 ps/Ökm

Fiber PMD link value

≤ 0.06 ps/Ökm

Effective group index of refraction at 1310 nm

1.467

Effective group index of refraction at 1550 nm

1.468

Backscatter coefficient at 1310 nm

-79.2 dB

Backscatter coefficient at 1550 nm

-81.7 dB

 

 

Geometrical Characteristics 

 

Mode field diameter at 1310 nm

8.6 ± 0.4 µm

Core/Cladding concentricity error

≤ 0.5 µm

Cladding diameter

125.0 ± 0.7 µm

Cladding non-circularity

≤ 0.7%

Primary coating diameter (uncoloured fibre)

242 ±5 µm

Primary coating diameter (coloured fibre)

250 ±10 µm

Fibre curl radius

≥ 4.0 m

Coating-Cladding concentricity

≤ 12 µm

 

 

Macrobending loss

 

10 turns, mandrel diameter 30 mm at 1550 nm

≤ 0.03 dB

10 turns, mandrel diameter 30 mm at 1625 nm

≤ 0.1 dB

1 turn, mandrel diameter 20 mm at 1550 nm

≤ 0.1 dB

1 turn, mandrel diameter 20 mm at 1625 nm

≤ 0.2 dB

1 turn, mandrel diameter 15 mm at 1550 nm

≤ 0.5 dB

1 turn, mandrel diameter 15 mm at 1625 nm

≤ 1.0 dB

 

 

Mechanical Characteristics 

 

Proof test level

≥ 100 kpsi (1.0% strain)

Coating strip force

1.3 ~ 8.9 N

Dynamic fatigue resistance parameter

≥ 20

 

 

1 ISO/IEC 11801-1