Features of FBT Coupler
- Compact size
- Low insertion loss
- Low PDL
- High stability and reliability
- Telecordia GR1221/1209 compliance
Applications of FBT Coupler
- EDFA
- CATV system
- Passive network
- WAN
- FTTH & LAN
FBT Coupler
FBT Coupler
Optiunik provides a wide breadth of FBT couplers, which includes SM standard coupler, dual-window coupler, three-window coupler, wideband coupler with low insertion loss and high performances. The FBT couplers are available with a coupling ration ranging from 1:99 to 50:50. Customized specifications are basically available. FBT Coupler is a type of splitter which is based on fused biconical taper technology. The technology is widely accepted and adopted in the PON solution. FBT or fused biconical taper is a traditional technology that two fibers are twisted and fused together under high temperature while the device is being elongated and tapered.
Performance Specifications
| Parameter | Wide Band Coupler (WBC) |
Dual Window Coupler (DWC) |
Multimode Fiber Coupler (MMC) |
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| Grade | P | A | P | A | P | A | |
| Operating Wavelength (nm) | 1310, 1550 or C+L Band | 1310 and 1550 | 850 or 1310 or Specify | ||||
| Operating Bandwidth (dB) | ±40 | ±40 | ±40 | ||||
| Typical Excess Loss (dB) | ≤0.07 | ≤0.1 | ≤0.07 | ≤0.1 | ≤0.4 | ≤0.7 | |
| Insertion Loss (dB) | 50/50 | ≤3.4 | ≤3.6 | ≤3.4 | ≤3.6 | ≤3.7 | ≤4.0 |
| 40/60 | ≤4.4/2.6 | ≤4.7/2.8 | ≤4.4/2.6 | ≤4.7/2.8 | ≤4.7/2.7 | ≤5.0/3.0 | |
| 30/70 | ≤5.7/1.9 | ≤6.0/2.0 | ≤5.7/1.9 | ≤6.0/2.0 | ≤6.0/2.1 | ≤6.3/2.4 | |
| 20/80 | ≤7.6/1.25 | ≤8.0/1.3 | ≤7.6/1.25 | ≤8.0/1.3 | ≤7.8/1.4 | ≤8.1/1.7 | |
| 10/90 | ≤10.65/0.65 | ≤10.9/0.8 | ≤10.65/0.65 | ≤10.9/0.8 | ≤11.2/0.9 | ≤11.6/1.2 | |
| 5/95 | ≤13.8/0.4 | ≤14.1/0.5 | ≤13.8/0.4 | ≤14.1/0.5 | ≤14.5/0.7 | ≤15.0/1.0 | |
| 3/97 | ≤16.15/0.3 | ≤16.5/0.4 | ≤16.15/0.3 | ≤16.5/0.4 | ≤16.15/0.3 | ≤16.5/0.4 | |
| 2/98 | ≤18.05/0.25 | ≤18.45/0.35 | ≤18.05/0.25 | ≤18.45/0.35 | ≤18.6/0.6 | ≤19.4/0.9 | |
| 1/99 | ≤21.15/0.2 | ≤21.65/0.3 | ≤21.15/0.2 | ≤21.65/0.3 | ≤22.0/0.5 | ≤22.8/0.8 | |
| Polarization Dependent Loss (dB) | ≤0.1 | ≤0.15 | ≤0.1 | ≤0.15 | – | – | |
| Directivity (dB) | ≥50 | ≥35 | |||||
| Operating Temperature (℃) | -10 ~ +70 | ||||||
| Storage Temperature (℃) | -40 ~ +85 | ||||||
Above specifications are for devices without connector.
Add an additional 0.2dB loss per connector.
| Configuration Type | 1×2 or 2×2 | ||
| Fiber Length | 1.5m, or Specify | ||
| Fiber Type | 250um bare fiber | 900um loose tube | 2mm, 3mm cable or 900um loose tube |
| Dimension | Φ3.0 × L54mm Φ3.0 × L60mm |
Φ3.0 × L54mm Φ3.0 × L60mm |
L90 × W20 × H10mm L100 × W80 × H10mm |
| A | B | C | D | E | F | G | H | I |
| Mode | Grade | Wavelength | Port | Fiber Type | Package | Fiber Diameter | Coupling Ratio | Connector |
| 1=WBC 2=DWC 3=MMC S=Specify |
P A |
1=1550 2=1310 3=1310/1550 4=1310/1490/1550 S=Specify |
1=1×2 2=2×2 |
0=SM 9/125 1=MM 50/125 2=MM 62.5/125 S=Specify |
1=Φ3×54 2=Φ3×60 3=90×20×10 4=100×80×10 |
0=250um 1=900um 2=2.0mm 3=3.0mm |
01=1/99 02=2/98 03=3/97 05=5/95 10=10/90 20=20/80 30=30/70 40=40/60 50=50/50 |
0=None 1=SC/APC 2=SC/UPC 3=LC/APC 4=LC/UPC 5=FC/APC 6=FC/UPC S=Specify |