Stock Code: 601869.SH / 06869.HK

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Used for new ultra-low attenuation large effective area single-mode fibre of the next-generation terrestrial transmission network

  • 2016-07-29
  • 6236
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The terrestrial network in China is mainly subject to the ordinary G.652.D optical fibre currently, while most of the optical cable laid in 1990s and have reached 20 --25 years’ service life, therefore, the backbone network should be upgraded gradually in the next few years. Therefore, how to choose the right optical fibre for the long-distance  terrestrialoptical cable is a key problem urgent to be solved for the network operators and optical communication companies. In order to obtain the best system performance, if we can  combine the ultra-low attenuation and large effective area characteristics into an optical fibre, such optical fibre will be the best optical fibre in the next-generation communication optical fibre.

1.     G.654.E Recommended indicators

The following table shows the currently discussed G.654.E optical fibre indicators and YOFC ultra-low loss large effective area optical fibre datasheet.  the ultra-low attenuation large effective area optical fibre (FarBand ® Ultra) of YOFC can meet and even be better than the most existing stringent G.654.E standard recommendation proposals.

Parameter name

G.654.E discussion paper

YOFC

Scope of product manual

Proposal 1

Recommendation 2

E1

E2

Optical parameters

 

*Mode field diameter @ 1550nm (um)

Nominal

11.5-13.0

11.0-12.0

12.0-13.0

11.4-12.2 Typical: 11.8

Deviations

±0.7

±0.7

±0.7

 

Effective area typical value @ 1550nm (um2)

\

\

\

110

*Optical cable cut-off wavelength (nm)

≤1510

≤1530

≤1530

≤1530

Typical value 1440nm

*Attenuation coefficient @ 1550nm (dB / km)

≤0.20

≤0.20-0.25

≤0.174 (Typical 0.160)

*Macro-bending (R30mm × 100 turns)

1550nm (dB)

TBD

TBD

TBD

≤0.1

1625nm (dB)

≤0.2

≤0.5

≤0.5

≤0.2

*Dispersion coefficient @ 1550nm (ps / nm / km)

≤22

≤22

≤22

≤22

 dispersion slop @ 1550nm (ps / nm2 / km)

≤0.070

≤0.070

≤0.070

≤0.070

PMD (ps/km1/2)

≤0.2

≤0.2

≤0.2

≤0.2

Geometric Parameter

 

 

 

 

Cladding outer diameter (um)

125±1

125±1

125±1

125±1

Core cladding concentricity (um)

≤0.8

≤0.8

≤0.8

≤0.8

Cladding circularity (%)

≤1.0

≤1.0

≤1.0

≤1.0

             

*Still under discussion, ITU-T Q5 group has no specific recommendations.

2.     Design and manufacturing of optical fibre

 

Schematic diagram for optical fibre refractive index profile structure

Compared YOFC the ultra-low loss large effective area optical fibre with the traditional fluorine-doped external cladding structure ULL fibre, YOFC adopts pure silicon dioxide  (SiO2) as the optical fibre cladding, due to the reduction in the use amount of fluorine-doped materials, in terms of material preparation cost, preparation technology difficulty, environmental protection and other points of view, our ultra-low attenuation large effective area optical fibre products are more competitive in the cost.

3.     Optical fibre and optical cable performance

 

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