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Single-mode Fiber

Single-mode Fibre G657.A1

Bending insensitive single-mode fibre encompasses all the features of fibre and provides good resistance to maro-bending. It has 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). It offers good resistance to additional losses due to low macro-bending in the 1625 nm wavelength region. This not only supports L-band applications but also allows for easy installation without excessive care when storing the fibre, for example, in splicing cassettes. For cable use inside buildings, the fibre supports installation with small cable bending radii and compact organizers.

    Applications

    Short pitch cables for special application

    High performance optical network operating in O-E-S-C-L band

    High speed optical routes in buildings (FTTx)

    Cables with low bending requirements

    Standards

    Bending insensitive single mode fibre meets or exceeds the ITU-T Recommendation G.652.D/G.657.A1 including the IEC 60793-2-50 type B1.3/B6.a1 Optical Fibre Specification.


    Characteristics

    Low attenuation satisfying the operation demand in O-E-S-C-L band

    Good bending loss resistance at short radius bends

    Low bending loss for highly demanding cable designs including ribbons

    Low PMD satisfying high bit-rate and long-distance transmission requirement

    Accurate geometrical parameters that insure low splicing loss and high splicing efficiency


    Specifications

    Characteristics

    Conditions

    Specified Values

    Units

    Optical Characteristics

    Attenuation

    1310nm

    ≤0.35

    [dB/km]

    1383nm(after H2-aging)

    ≤0.35

    [dB/km]

    1460nm

    ≤0.25

    [dB/km]

    1550nm

    ≤0.21

    [dB/km]

    1625nm

    ≤0.23

    [dB/km]

    Attenuation vs. Wavelength

    Max. α difference

    1285-1330nm, in reference to 1310nm

    ≤0.03

    [dB/km]

    1525-1575nm, in reference to 1550nm

    ≤0.02

    [Db/km]

    Dispersion Coefficient

    1285-1340nm

    -3.5 to 3.5

    [ps/(nm·km)]

    1550nm

    ≤18

    [ps/(nm·km)]

    1625nm

    ≤22

    [ps/(nm·km)]

    Zero Dispersion Wavelength(λ0)

    --

    1300-1324

    [nm]

    Zero Dispersion Slope(S0)

    --

    ≤0.092

    [ps/(nm2·km)]

    Typical Value

    --

    0.086

    [ps/(nm2·km)]

    PMD

    Maximum Individual Fibre

    --

    ≤0.1

    [ps/√km]

    Link Design Value (M=20,Q=0.01%)

    --

    ≤0.06

    [ps/√km]

    Typical Value

    --

    0.04

    [ps/√km]

    Cable Cutoff Wavelength (Λcc)

    --

    ≤1260

    [nm]

    Mode Field Diameter(MFD)

    1310nm

    8.4-9.2

    [μm]

    1550nm

    9.3-10.3

    [μm]

    Effective Group Index of Refraction(Neff )

    1310nm

    1.466

    --

    1550nm

    1.467

    --

    Point Discontinuities

    1310nm

    ≤0.05

    [Db]

    1550nm

    ≤0.05

    [Db]

    Geometrical Characteristics

    Cladding Diameter

    --

    125.0±0.7

    [μm]

    Cladding Non-Circularity

    --

    ≤0.7

    [%]

    Coating Diameter

    --

    235-245

    [μm]

    Coating-Cladding Concentricity Error

    --

    ≤12.0

    [μm]

    Coating Non-Circularity

    --

    ≤6.0

    [%]

    Core-Cladding Concentricity Error

    --

    ≤0.5

    [μm]

    Curl(radius)

    --

    ≥4

    [m]

    Delivery Length

    --

    Up to 50.4

    [km/reel]

    Environmental Characteristics

    1310nm, 1550nm & 1625nm

    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 Attenuation

    23°C, for 30 days

    ≤0.05

    [Db/km]

    Damp Heat Dependence Induced Attenuation

    85°C and 85% RH, for 30 days

    ≤0.05

    [Db/km]

    Dry Heat Aging

    85℃, for 30 days

    ≤0.05

    [Db/km]

    Mechanical Specification

    Proof Test

    --

    ≥9.0

    [N]

    --

    ≥1.0

    [%]

    --

    ≥100

    [kpsi]

    --

    --

    --

    Macro-bend Induced Loss

    10 Turns Around a Mandrel of 15 mm Radius

    1550nm

    ≤0.25

    [Db]

    10 Turns Around a Mandrel of 15 mm Radius

    1625nm

    ≤1.0

    [Db]

    1 Turn Around a Mandrel of 10 mm Radius

    1550nm

    ≤0.75

    [Db]

    1 Turn Around a Mandrel of 10 mm Radius

    1625nm

    ≤1.5

    [Db]

    Coating Strip Force

    typical average force

    1.5

    [N]

    peak force

    1.3-8.9

    [N]

    Dynamic Fatigue Parameter (nd)

    --

    ≥20

    --

     


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