ABS Box Type FBT Coupler

FBT coupler stands for “Fused Biconical Taper Coupler.” It is a type of optical coupler used in fiber optic communication systems to split or combine light signals between two or more optical fibers. The FBT coupler is made by fusing two or more fibers together and then tapering the fused region down to a smaller diameter. The tapering process causes some of the light to be coupled or split between the fibers, depending on the specific design of the coupler. FBT couplers are widely used in telecommunications, fiber optic sensors, and other applications where splitting or combining light signals is required.

Description

Product Characteristics

100% tested assemblies and traceable test data
Stable optical performance, high reliability
Low insertion loss
Polarization insensitive

Product Parameters

1×2 ABS Box Type FBT Coupler
Port	1×2
Wavelength(nm)	1310&1550(±40)
Fiber Type	Corning SMF-28e
Tail Fiber	Input:2.0mm/3.0mm loose tube
Tail Fiber	Output:2.0mm/3.0mm loose tube
Size(mm)	102090
Operating Temperature (°C)	﹣40~﹢85
Coupling Ratio	1:99	2:98	5:95	10:90	20:80	30:70	40:60	50:50
Insertion Loss(dB)	≤23.5	≤19.8	≤15.2	≤11.3	≤7.9	≤6.0	≤4.7	≤3.6
Insertion Loss(dB)	≤0.3	≤0.3	≤0.4	≤0.6	≤1.2	≤1.9	≤2.7	≤3.6
Uniformity Loss(dB)	≤0.8	≤0.8	≤0.8	≤0.8	≤0.8	≤0.8	≤0.8	≤0.8
Return Loss(dB)	≥50	≥50	≥50	≥50	≥50	≥50	≥50	≥50
Polariation Dependent Loss(dB)	≤0.15	≤0.15	≤0.15	≤0.15	≤0.15	≤0.15	≤0.15	≤0.15
Directivity(dB)	≥50	≥50	≥50	≥50	≥50	≥50	≥50	≥50