Overview
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. Idealphotonics 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.
Physical/Optical Characteristics
Specifications of Two Mode Fibre (Graded-Index)
Fibre Type | FM GI-2 |
Part No. | IP-FM2010-A |
Optical Characteristics@1550nm | Range | Typical Value |
Core Diameter (μm) | 20.0 ± 0.3 | -- |
Cladding Diameter (μm) | 125.0 ± 0.5 | -- |
Cladding Non-circularity (%) | < 0.7 | -- |
Wavelength (nm) | 1450 - 1700 | -- |
Coating Diameter (μm) | 245.0 ± 10.0 | -- |
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 |
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.
Specifications of Two Mode Fibre (Step-Index)
Fibre Type | IP-FM SI-2 |
Part No. | FM2010-B |
Optical Characteristics@1550nm | Range | Typical Value |
Core Diameter (μm) | 14.0 ± 0.5 | -- |
Core Refractive Index | 1.4485 | -- |
Cladding Diameter (μm) | 125.0 ± 0.7 | -- |
Cladding Non-circularity (%) | < 0.7 | -- |
Coating Diameter (μm) | 245.0 ± 10.0 | -- |
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. | IP-FM2010-C |
Optical Characteristics@1550nm | Range | Typical Value |
Core Diameter (μm) | 16.0 ± 0.2 | -- |
Cladding Diameter (μm) | 125.0 ± 1.0 | -- |
Cladding Non-circularity (%) | < 0.7 | -- |
Wavelength (nm) | 1450 - 1700 | -- |
Coating Diameter (μm) | 245.0 ± 10.0 | -- |
Dispersion (ps/(nm·km)) | LP01 | 21.0 - 23.0 | 22.53 |
LP11 | 21.0 - 23.0 | 22.82 |
Dispersion Slope (ps/(nm2·km)) | LP01 | 0.08 - 0.11 | 0.1012 |
LP11 | 0.08 - 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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