Fused Biconic Taper (FBT) coupler, also be called FBT splitter, based on the traditional technology, it is to bundle to- gether two or more optical fibers, and then pull the cone machine melt stretching, and real-time monitoring the change of the ratio, spectral ratio requirements after melt stretching, one side retain a single fiber (the rest of the cut) as input, the other end is a multi-channel output.
As one of the key components for GPON FTTx networks, optical splitters can be placed in the Central Office or in one of the distribution points (outdoor or indoor) because the FBT coupler are highly stable for multiport optical signal splitting with low insertion loss. FBT couplers are designed for power splitting and tapping in telecommunication equipment, CATV network, and test equipment
Features:
Low insertion loss
Low polarization dependent loss
High Return Loss Optional
Split Ratio 20/80, 40/60. (50/50 as default.)
Compact for small application areas like in closure or splice trays
Wide Operating Temperature and Wavelength
Excellent Environmental & Mechanical Stability
Qualified under Telcordia GR-1221 and GR-1209 High Quality Plastic ABS Box
Application:
FTTX (FTTP, FTTH, FTTN, FTTC)
Passive Optical Networks (PON)
Local Area Networks (LAN)
CATV Systems Amplifying,
Monitoring System
Specification:
Single mode Dual Window Wideband Couplers | ||
Quality Grade | Premium Grade | A Grade |
Coupling Ratio(%) | 50/50 | 50/50 |
Excess Loss (Typical)(dB) | 0.1 | 0.15 |
Maximum insertion loss(dB) | 3.6 | 3.8 |
Uniformity (Max.) (dB) | 0.7 | 1.0 |
Polarization Sensitivity (dB) | 0.15 | 0.2 |
Operating Wavelength(nm) | 1310/1550±40 or custom wavelength |
*Measured under the stable mode condition with LED light source.
Coupling Ratio/insertion Loss Conversion Chart
Coupling Ratio | Insertion Loss | |
Premium Grade | A Grade | |
40/60 | 4.7/2.7 | 5.0/2.9 |
30/70 | 6.0/2.0 | 6.4/2.2 |
20/80 | 7.9/1.5 | 8.5/1.7 |
10/90 | 11.3/0.65 | 12.0/0.8 |
5/95 | 14.8/0.4 | 15.3/0.55 |
1/99 | 22.5/0.3 | 23.0/0.35 |
Coupling Ratio(%) | 1~50 | |
Directivity (dB) | >55 | |
Operating Temperature(℃) | -20~+80 | |
Storage Temperature(℃) | -40~+85 | |
Fiber Type | Corning single mode SMF-28 | |
Fiber Pigtail Length(m) | 1 | |
Port Configuration | 1×2 or 2×2 |