Stock Code:601869.SH / 06869.HK

Few-mode Fibre (FMF)

The MDM transmission system uses the limited orthogonal modes in few mode fibre(FMF) as the independent channels to carry out information transmission in order to multiply the transmission capacity of the system. The few mode optical fibre uses different modes in the fibre as a new degree of freedom, the spectrum efficiency of the system can be improved successfully by FMF. As FMF has large mode field areas, its nonlinear tolerance is always better than that of SMF. It not only improves the capacity of optical transmission system, but also avoid the nonlinear effects. The MDM system based on FMF can solve the future single mode fibre bandwidth crisis. YOFC FMFs taking advantages of PCVD process which is able to manufacture complex index-profile accurately , can get various types of core layer structure, such as Step-Index, Graded-Index etc.According to different design, 2-mode, 4-mode, 6-mode, 9-mode FMFs and even Ultra-low-loss(ULL) FMFs can be realized.
Applications
  • Mode division multiplexing(MDM)
  • Communication
  • Sensing
Characteristics
  • Strictly controlled optical and geometrical parameters
  • Customized waveguide is available
  • Low macro-bending loss
  • Low DMD for graded index fibre
  • High DMD for step index fibre
Specifications of Two Mode Fibre (Graded-Index)

Note: We further provide Four Mode Fibre (Graded-Index), Four Mode Fibre (Step-Index), ULL-Four Mode Fibre (Step-Index), Six Mode Fibre( Graded-Index), Six Mode Fibre( Step-Index) and Nine Mode Fibre( Graded-Index). For more information about our Few-mode Fibre, please see the product catalogue.

Fibre Type FM GI-2

Part No.

FM2010-A
Optical Characteristics@1550nm

Range

Typical Value

Core Diameter (μm)

20±0.3

--

Cladding Diameter (μm)

125±0.5

--

Cladding Non-circularity (%)

< 0.7

--

Wavelength (nm)

1450-1700

--

Coating Diameter (μm)

245±10

--
Dispersion (ps/(nm·km))

LP01

≤23 21.2

LP11

≤23 20.5
Dispersion Slope (ps/(nm2·km))

LP01

≤0.11 0.098

LP11

≤0.11 0.096
Effective Area (μm2)

LP01

≥100 112

LP11

≥140 152

Attenuation (dB/km)

LP01

≤0.21 0.19

LP11

≤0.21 0.20
Differential Group Delay (ps/m)

LP11-LP01

- 0.3 to  0.3 -0.14
Specifications of Two Mode Fibre (Step-Index)
Fibre Type FM SI-2
Part No. FM2010-B
Optical Characteristics@1550nm

Range

Typical Value

Core Diameter (μm)

14±0.5 --
Core Refractive Index

1.4485

--
Cladding Diameter (μm) 125±0.7 --

Cladding Non-circularity (%)

< 0.7

--

Coating Diameter (μm)

245±10

--
Dispersion (ps/(nm·km))

LP01

<22 21

LP11

<21 19.5
Dispersion Slope (ps/(nm2·km))

LP01

<0.1 0.08

LP11

<0.1 0.07
Effective Area (μm2)

LP01

>100 130

LP11

>200 220

Attenuation (dB/km)

LP01

<0.21 0.19

LP11

<0.21 0.19
Differential Group Delay (ps/m)

LP11-LP01

<2.1 1.9
Specifications of ULL-Two Mode Fibre (Step-Index)

 

Fibre Type FM SI-2-ULL
Part No. FM2010-C
Optical Characteristics@1550nm

Range

Typical Value

Core Diameter (μm)

16±0.2 --
Cladding Diameter (μm) 125±1 --

Cladding Non-circularity (%)

< 0.7

--
Wavelength (nm) 1450-1700 --

Coating Diameter (μm)

245±10

--
Dispersion (ps/(nm·km))

LP01

≤23 22.53

LP11

≤23 22.82
Dispersion Slope (ps/(nm2·km))

LP01

≤0.11 0.1012

LP11

≤0.11 0.1011
Effective Area (μm2)

LP01

150 - 200 169

LP11

150 - 200 167

Attenuation (dB/km)

LP01

≤0.17 0.161

LP11

≤0.17 0.161
Differential Group Delay (ps/m)

LP11-LP01

≤5 2.36

 

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