OPTOKON

Fiber type

G.657.A1

OPK code

200A1

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 (typical / max.)

at 1310 nm

0.32 / 0.36 dB/km

at 1550 nm

0.19 / 0.24 dB/km

at 1625 nm

0.22 / 0.26 dB/km

Point of discontinuity  at 1310 nm and 1550 nm

≤ 0.1 dB

Cable cut-off wavelength (λcc)

≤ 1260 nm

Zero dispersion wavelength

1302 – 1324 nm

Zero dispersion slope

≤ 0.092 (ps/(nm2/km )

Chromatic dispersion at 1285 ~ 1330 nm

≤ 3.5 ps/(nm.km)

Chromatic dispersion at 1550 nm

≤ 18.0 ps/(nm.km)

Maximum individual fiber PMD

≤ 0.1 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

Effective group index of refraction at 1625 nm

1.468

Backscatter coefficient at 1310 nm

-79.2 dB

Backscatter coefficient at 1550 nm

-81.7 dB

Backscatter coefficient at 1625 nm

-82.5 dB

Geometrical Characteristics 

Mode field diameter at 1310 nm

8.9 ± 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)

190 ±10 µm

Primary coating diameter (coloured fibre)

200 ±10 µm

Coating-Cladding concentricity

≤ 12 µm

Macrobending loss

10 turns, mandrel radius 15 mm at 1550 nm

≤ 0.25 dB

10 turns, mandrel radius 15 mm at 1625 nm

≤ 1.0 dB

1 turn, mandrel radius 10 mm at 1550 nm

≤ 0.75 dB

1 turn, mandrel radius 10 mm at 1625 nm

≤ 1.5 dB

Mechanical Characteristics 

Proof test level

≥ 100 kpsi (1.0% strain)

Coating strip force

0.5 ~ 8.9 N

Typical attenuation is the value measured for at least 90% of the fibers in the cable.

OTDR measurement values can only be guaranteed for cable lengths of 1000 m and more.

Cable on the reel may show an discontinuity of the OTDR curve caused by winding of the cable on the reel.