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FBT Coupler

FBT Coupler

T&S Communication coupler manufacturer provides 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)
1×2 Tap Coupler(WTC)
Three-Windows Couple(TWC)
1×N Monolithic Single Mode Couple(MSC)

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

dBMax

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

dBMax

0.5

0.7

/

/

/

/

/

/

PDL

dBMax

0.15

0.2

0.2

0.25

0.2

0.25

0.2

0.3

Return Loss

dB

≥50

Operating Temperature


-20~75


Wavelengthnm

1550 or on Request

Bandwidth

nm

±20

Coupling Ratio



1/99

2/98

5/95

Grade



P

S

P

S

P

S

Insertion Loss

dBMax

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

dBMax

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


Wavelengthnm

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

dBMax

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

dBMax

0.5

0.7

/

/

/

/

/

/

PDL

dBMax

0.2

0.25

0.2

0.25

0.2

0.25

0.2

0.3

Return Loss

dB

≥50

Operating Temperature


-20~75



Wavelengthnm

1310,1550 or on Request

Bandwidth

nm

±20

Coupling Ratio



1×3

1×4

Grade



P

S

P

S

Insertion Loss


dBMax

5.4

5.7

7

7.4

Uniformity

Max

dBMax

0.8

1.2

1.2

1.5

PDL

Max

dBMax

0.2

0.3

0.2

0.3

Return Loss

dB

≥50

Operating Temperature


-20~75


Product Inquiry
Email us if you are interested in ts communication fiber optic products and solutions. We would be happy to answer your questions.
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