Optical Fused Coupler
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Pictures and Schematic Diagram
The optical fused coupler goes by names. Fused fiber coupler and FBT splitter are just a couple. The word fused indicates that the coupler is made by fusing two adjacent fibers together to form a fused biconical taper coupler.
Applications of Optical Fused Coupler
FTTH
Telecommunication Networks System
Passive telecommunication networks (PON)
CATV
fiber optic test equipment
Fiber optic sensor
LAN
Features of FBT Coupler
Low insertion loss
Low polarization loss
High directivity
High stability and reliability
Technical Specifications of Optical Fused Coupler
| Parameters | Unit | Specifications | |||
| Channel Number | --- | 4 | 8 | 16 | 32 |
| Operation Wavelength | nm | 1550/1310, or on request | |||
| Coupling Ratio | --- | 50/50 | |||
| Max. Excess Loss | dB | 0.25£ | 0.4£ | 0.55£ | 0.7£ |
| Insertion Loss | dB | 7.1£ | 10.7£ | 13.0£ | 16.5£ |
| Uniformity | Db | 2.1£ | 8.1£ | 4.2£ | 3£ |
| Polarization Sensitivity Loss | dB | 0.2£ | 0.3£ | 0.4£ | 0.5£ |
| Directivity | dB | 50³ | |||
| Fiber Pigtail Length (m) | m | 1 m or custom length | |||
| Fiber Type | --- | SMF-28e 250um fiber with 900um loose tube | |||
| H´W´Package Dimension(L | mm | 10´ 80 ´100 | 120´80´18 | ||
| Operating Temperature | ℃ | -20 to 70 | |||
| Storage Temperature | ℃ | -40 to 85 | |||
Note: All insertion loss doesn’t include connector loss. For fiber optic components with connectors, the insertion loss will be 0.3 dB higher.
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