TS Communication manufacture and provide 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 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.
Features of FBT Coupler
Passed Telcordia GR-1221-CORE, and 85℃, 85％RH test up to 1500 hours
Low extra loss
Specifications of FBT Coupler
1×2 Single Mode Coupler(SMC)
|
Wavelength
|
nm
|
|
1310,1550,1310&1550
|
|
Bandwidth
|
nm
|
|
±20，±40
|
|
Coupling Ratio
|
|
|
50/50
|
40/60
|
20/80
|
10/90
|
|
Grade
|
|
|
P
|
S
|
P
|
S
|
P
|
S
|
P
|
S
|
|
Insertion Loss
|
dB
|
Max
|
3.4
|
3.6
|
4.4/2.6
|
4.6/2.8
|
7.5/1.2
|
8.0/1.3
|
11.0/0.65
|
12.0/0.8
|
|
Uniformity
|
dB
|
Max
|
0.5
|
0.7
|
/
|
/
|
/
|
/
|
/
|
/
|
|
PDL
|
dB
|
Max
|
0.15
|
0.2
|
0.2
|
0.25
|
0.2
|
0.25
|
0.2
|
0.3
|
|
Return Loss
|
dB
|
|
≥50
|
|
Operating Temperature
|
℃
|
|
-20～75
|
1×2 Tap Coupler(WTC)
|
Wavelength
|
nm
|
|
1550 or on Request
|
|
Bandwidth
|
nm
|
|
±20
|
|
Coupling Ratio
|
|
|
1/99
|
2/98
|
5/95
|
|
Grade
|
|
|
P
|
S
|
P
|
S
|
P
|
S
|
|
Insertion Loss
|
dB
|
Max
|
21.5/0.22
|
22.0/0.3
|
18.5/0.25
|
19.5/0.35
|
14.0/0.4
|
14.8/0.5
|
|
PDL
|
dB
|
Max
|
0.25/0.10
|
0.30/0.15
|
0.25/0.10
|
0.30/0.15
|
0.25/0.10
|
0.30/0.15
|
|
Return Loss
|
dB
|
|
≥50
|
|
Operating Temperature
|
℃
|
|
-20～75
|
Three-Windows Couple
|
Wavelength
|
nm
|
|
1310&1490&1550
|
|
Bandwidth
|
nm
|
|
1310±40,1490±10,1550±40
|
|
Coupling Ratio
|
|
|
50/50
|
40/60
|
20/80
|
10/90
|
|
Grade
|
|
|
P
|
S
|
P
|
S
|
P
|
S
|
P
|
S
|
|
Insertion Loss
|
dB
|
Max
|
3.7
|
4
|
4.7/2.7
|
5.0/3.0
|
7.8/1.4
|
8.1/1.7
|
11.2/0.9
|
11.6/1.2
|
|
Uniformity
|
dB
|
Max
|
0.5
|
0.7
|
/
|
/
|
/
|
/
|
/
|
/
|
|
PDL
|
dB
|
Max
|
0.2
|
0.25
|
0.2
|
0.25
|
0.2
|
0.25
|
0.2
|
0.3
|
|
Return Loss
|
dB
|
|
≥50
|
|
Operating Temperature
|
℃
|
|
-20～75
|
(TWC)1×N Monolithic Single Mode Couple(MSC)
|
Wavelength
|
nm
|
|
1310,1550 or on Request
|
|
Bandwidth
|
nm
|
|
±20
|
|
Coupling Ratio
|
|
|
1×3
|
1×4
|
|
Grade
|
|
|
P
|
S
|
P
|
S
|
|
Insertion Loss
|
|
dB
|
Max
|
5.4
|
5.7
|
7
|
7.4
|
|
Uniformity
|
Max
|
dB
|
Max
|
0.8
|
1.2
|
1.2
|
1.5
|
|
PDL
|
Max
|
dB
|
Max
|
0.2
|
0.3
|
0.2
|
0.3
|
|
Return Loss
|
dB
|
|
≥50
|
|
Operating Temperature
|
℃
|
|
-20～75
|
