Introduction of Fiber Optic Coupler
Fused Biconical Taper (FBT) is used for splitting or combining optical signals. The splitting or coupling ratio is controlled and can be modified upon costumer request as well as the amount of splitting ports. The FBT coupler supports dicrete wavelength window.


Advantages of FBT Couplers
FBT Coupler has three key advantages shown as below:Low Loss Process: Ther fiber coupling is a low-loss process, in fact, there is no loss during the conversion from core mode to coupling mode and back to core mode. Hence, we have to account for losses caused by light propagation through a short cladding length. However, the insertion loss of an assembled coupler is rather high and depends on the coupling ratio. No Back Reflection: Light never leaves the fiber structure during the coupling process so it never encounters any interface. Thus, this type of coupler is intrinsically free from back reflection. In fact, data sheets for this type of coupler do not include this specification. Easy Connectorizing: Since FBT couplers are made from regular fiber, connectorizing an FBT coupler with a transmission fiber is an easy, low-loss procedure.

Features
• Proven FBT fabrication techniques
• Broadband performance
• Environmentally stable
• Low Insertion Loss (IL)
• Polarization insensitive
• Miniature or ruggedized package
• Standard connectors and cable leads available
• Produced by fused technology
• Bare optical fiber, 0.9 mm, 2.0 mm, and 3.0 mm Input/Output Cable
• Bare fiber, Steel Tube, ABS Module Package.

Mechanical Drawing: