FBT Fused Splitter 1×2

There are two types of fiber optic splitters: Fused Biconical Taper (FBT) Splitter and Planar Lightwave Circuit (PLC) Splitter. It is very important to choose the right splitter for your optical network based on several aspects, such as splitting ratios, maximum fibers, cost and temperature dependent loss.

The splitting ratio is determined by the input and output of a splitter. The splitting ratio of FBT is up to 1:32, while the splitting ratio of PLC splitter is up to 1:64.

When the split ratio is higher than 1:8, more errors will occur and the reliability of the splitter is decreased. This is why FBT splitter is more commonly used in networks requiring the splitter configuration of less than 4 splits.

In terms of working principle, FBT splitter is a traditional technology in that two fibers are twisted and fused together under high temperature while being elongated and tapered. It is a reliable and widely accepted splitter, especially for those networks that need small split configurations such as 1×4 or less.

FBT splitter is available in various packing forms, such as steel tube type, box type and multi-channel box type. It is more popular than the PLC splitter because of its low cost and easy installation. Besides, FBT splitter is more flexible because it leaves fiber on all ends, which enables network engineers to splice them to different lengths.

 Features:

Low Insertion loss

Various Coupling Ratio

Compact Size

Application:

• Long-haul Telecommunications
• CATV Systems & Fiber Sensors
• Local Area Network
• Optical Fiber Communication Systems
• Passive Optical Network
• Optical Access Networks

Various types:

1×2 LC/UPC FBT Fused Splitter (OM4 900um, MM, 70/30 splitter)

1×2 LC/UPC FBT Splitter (OM4 900um, MM, 50/50 splitter)

1×2 LC/UPC FBT Coupler ( 900um, SM, 70/30 splitter)

1×2 LC/UPC Fused Biconical Taper ( 900um, SM, 50/50 splitter)

SM FBT Optical Coupler Specifications

Coupling Ratio	Insertion Loss（dB）
	Tap	Signal
50/50	2.8-3.6	≤3.6
45/55	3.3-3.9	≤3.0
40/60	3.8-4.5	≤2.6
35/65	4.2-5.0	≤2.2
30/70	4.6-5.7	≤1.9
25/75	5.8-6.7	≤1.6
20/80	6.7-7.6	≤1.2
15/85	7.8-9.0	≤0.98
10/90	9.3-11.0	≤0.63
5/95	12.4-14.0	≤0.41
1/99	18.6-21.0	≤0.25
Excess Loss(Typ.)（dB）	0.1
PDL(Max.)（dB）	0.15
Operating Wavelength（nm）	1310±40, 1550±40,1310/1550±40,1310/1550/1490±40 or custom wavelength
Directivity（dB）	≥55
Port Configuration	1×2 or 2×2
Note: All the data above does not include connectors

MM FBT Optical Coupler Specifications

Parameter	Insertion Loss（dB）
Test Wavelength (nm)	1310		850
Splitting Ratio	Tap	Signal	Tap	Signal
50/50	3.0-4.1	≤4.1	3.0-4.1	≤4.1
40/60	4.3~5.4	≤3.0	3.8~4.9	≤3.4
30/70	5.1~7.0	≤2.3	4.9~6.4	≤2.4
20/80	7.2~9.4	≤1.65	6.3~8.1	≤1.9
10/90	9.8~14.5	≤1.15	8.3~11.5	≤1.4
1/99	19.1-22.3	≤0.70	16.8-21.5	≤0.75
Operation Wavelength(nm)	850±40, 1310±40,850/1310±40
Directivity（dB）	≥40
Operating Temperature	-20～+70℃
Storage Temperature	-40～+85℃