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Brief of ODN
The optical distribution network (ODN) is an indispensable path for transmitting Passive Optical Network(PON) data and directly affects the performance, reliability, and scalability of a PON system. It consists of three parts: optical line terminal (OLT), optical distribution network (ODN), and optical network terminal (ONT). The ODN, an integral part of PON system, resides as the physical path for optical transmission between the OLT and the ONT. Its reach is 20 km or farther. Within the ODN, Optical Fibers, Optical connectors, Optical Splitters, and auxiliary components collaborate with each other.
The ODN specifically has five segments: Feeder Cable, Optical Distribution Point, Distribution cable, Optical Access Point, and Drop Cable. The feeder cable starts from the optical distribution frame (ODF) in the central office (CO) telecommunications room and ends at the optical distribution point for long-distance coverage. The distribution cable from the optical distribution point to the optical access point distributes optical fibers for areas alongside it. The drop cable connects the optical access point to terminals (ONTs), achieving optical fiber drop into user homes.
Fiber Optic Cable in ODN network
Fiber Optic Cables include Feeder cable section, distribution cable section and drop cable section are referenced the fiber cable in ODN.
Fiber type for the Fiber Optic Cable
Most used fiber type are G.652D and G.657A1, the parameter details as below table 1.
| Item | G.652D | G.657A1 | |||
| Attenuation of uncabled fiber (dB/km) | 1310nm | ≤0.36 | ≤0.36 | ||
| 1383nm | ≤0.35 | ≤0.35 | |||
| 1550nm | ≤0.22 | ≤0.22 | |||
| 1625nm | ≤0.24 | ≤0.24 | |||
| 1288 – 1339nm | ≤3.5 | ≤3.5 | |||
| Chromatic dispersion (ps/nm.km) | 1271 – 1360nm | ≤5.3 | ≤5.3 | ||
| 1550nm | ≤18 | ≤18 | |||
| 1625nm | ≤22 | ≤22 | |||
| Coating Diameter (μm) | Before colored | 245 ± 10 | 245 ± 10 | ||
| colored | 250 ± 15 | 250 ± 15 | |||
| Mode – field Diameter at 1310nm (μm) | 9.2 ± 0.4 | 8.6 – 9.5 ± 0.4 | |||
| Cladding Diameter (μm) | 125.0 ± 1 | 125.0 ± 0.7 | |||
| Core concentricity error (μm) | ≤0.6 | ≤0.5 | |||
| Cladding non – circularity (%) | ≤1.0 | ≤1.0 | |||
| Cabled Cut – off Wavelength (nm) | ≤1260 | ≤1260 | |||
| Zero Dispersion Wavelength (nm) | 1300 – 1324 | 1300 – 1324 | |||
| Zero Dispersion Slope ps/nm².km | ≤0.092 | ≤0.092 | |||
| PMD link value ps/(km¹/²) (M = 20, Q = 0.01) | ≤0.10 | ≤0.10 | |||
| Individual Fiber Polarization Mode Dispersion Proof ps/(km¹/²) | ≤0.20 | ≤0.20 | |||
| Proof Test | 1.0 (0.69Gpa, 100kpsi) | 1.0 (0.69Gpa, 100kpsi) | |||
| Fiber Curl (M) | ≥4.0 | ≥4.0 | |||
| Uncabled fiber macrobending loss (dB) | Radius (mm) | 30 | 16 | 15 | 10 |
| Turns | 100 | 1 | 10 | 1 | |
| 1550nm | ≤0.1 | ≤0.05 | ≤0.25 | ≤0.75 | |
| 1625nm | ≤0.1 | ≤0.05 | ≤1.0 | ≤1.5 |
Cable Types of Fiber Optic Cable
| Application | Fiber Optic Cable Type |
| Duct | GYTA, GYFTA, GYTS, GYFTY |
| Direct burial (all dielectric) | GYFTY63, GYFTY73, GYFTY83 |
| Direct burial (steel tape armor) | GYTA53, GYFTA53, GYTY53, GYFTY53 |
| Air blown micro – duct | GCYFTY |
| Figure – 8 self – supporting aerial | GYTC8A, GYTC8S, GYFTC8Y |
| All dielectric self support | ADSS |
| Indoor drop | GJXH, GJXFH, GJXFCH, GYXTZY |
| Indoor vertical and horizontal distribution | GJPFJH, GJBFJH |
Main Features of Fiber Optic Cable
Duct or non-self-supporting aerial Optical Cable
- G.652D fiber, latest ITU-T Rec. compliant
- The Polybutylene Terephthalate (PBT) loose tube has favorable waterproof performance and high strength.
It is filled with special ointment, which can protect optical fibers - The PE sheath has fine anti-ultraviolet performance and a small friction factor for optical cable installation
- The compact structure of the optical cable resists tube shrinkage
- Complies with standards IEC 60794-1 and YD/T 901
Self-supporting aerial Optical Cable
- G.652D fiber, latest ITU-T Rec. compliant
- The self-supporting design is highly efficient for cable installation
- The PBT loose tube has favorable waterproof performance and high strength. It is filled with special ointment, which can protect optical fibers
- The PE sheath has good anti-Ultraviolet performance
- Complies with standards IEC 60794-1 and YD/T 901.
Direct Buried Optical Cable
- G.652D fiber, latest ITU-T Rec. compliant
- The PBT loose tube has favorable waterproof performance and high strength. It is filled with special ointment, which can protect optical fibers
- The PE sheath has good anti-ultraviolet performance and a small friction factor for optical cable installation
- The compact structure of the optical cable resists tube shrinkage
- Complies with standards IEC 60794-1 and YD/T 901
Indoor Cable and Drop Cable
- The fiber is easy to strip and branch
- The optical cable is simple, lightweight, and functional
- The sheath material adopts LSZH with better characteristic of low-mist halogen-free fire-retardant
- Complies with standards IEC 60794-1,YD/T1258 and YD/T1997
The above details are are for reference only, Welcome to discuss the type which you would like.
Click here to get to know The typical Fiber Optic Cable structure and production process.
