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SINGLEMODE OPTICAL FIBRE SMF ? G6570 pages
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OPTRAL
SM10
SINGLEMODE OPTICAL FIBRE SMF – G657
Low macrobending sensitive fibre (G.657) provides high resistance to
additional losses due to macrobending. Ideal for cable mounting inside
buildings, patchcords and/or interconnection cables. It offers significant added
value in Fibre-to-the-Home accesss networks.
All technical specifications are subject to change without prior notice. Consult OPTRAL for the latest edition.
The fibre fully comply with or exceeds the IEC 60793-2-50, ITU G.652.D,
G657A1, G.657A2, G.657B2, G657B3, Telcordia GR-20-CORE, ANSI/IECA
S-87-640.
GEOMETRICAL AND MECHANICAL CHARACTERISTICS
G.657.A1
G.657.A2 / B2
G.657.B3
125 ± 0.7 μm
125 ± 0.4 μm
Core / Cladding Concentricity
≤ 0.5 μm
≤ 0.3 μm
Cladding Non-Circularity
≤ 0.7 %
≤ 0.3 %
242 ± 0.7 μm
242 ± 0.5 μm
Cladding Diameter
Primary Coating Diameter
≤ 12 μm
Coating / Cladding Concentricity
≤ 10 μm
≤ 12 μm
≤5%
Coating Non-Circularity
≥ 8.8 N / ≥ 1 % / ≥ 100 Kpsi
Proof Test
OPTICALCHARACTERISTICS
≥ 200 Kpsi
G.657.A2 / B2
G.657.B3
1 turn / Mandrel 10mm
< 0.75
< 0.10
< 0.03
10 turns / Mandrel 15mm
Attenuation with Bending
(1550 nm)
G.657.A1
< 0.25
< 0.03
1 turn / Mandrel 7.5mm
< 0.08
1 turn / Mandrel 5mm
< 0.15
1310 nm
8.5 – 9.3
8.8 ± 0.4
10.1 ± 0.5
9.4 – 10.4
9.8 ± 0.5
1310 nm
< 0.35
< 0.35
< 0.35
1383 nm
< 0.35
< 0.35
< 0.35
1460 nm
< 0.25
< 0.25
1550 nm
< 0.21
< 0.21
< 0.22
1625 nm
Attenuation Coefficient
(dB/Km)
9.0 ± 0.4
1550 nm
Mode Field Diameter
(μm)
< 0.23
< 0.23
< 0.24
1285 – 1330 nm
1550 nm
< 18
1625 nm
Chromatic Dispersion Coefficient
(ps/nm.Km)
< |3|
< 22
Zero Dispersion Wavelength (nm)
1300 – 1322
1300 – 1324
1300 – 1324
Zero Dispersion Slope
2
(ps / nm Km)
< 0.090
< 0.092
< 0.092
Cable Cut-off Wavelength (nm)
< 1260
PMD (ps / (ps/√Km)
1550 nm
< 0.1
Characteristics according to ITU-T G652.D, G657A, G657B, IEC 60793-2-50, Telcordia GR-20-CORE, ANSI/ICEA S-87-640.
Important notice.- At present, G657 fibres are not recognized by some splicing machines. Check your machine before use or
ask your local distributor.
Optical specifications for uncabled fibre
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optral@optral.com - www.optral.com
Ref.: ETW.04.007/04
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