FBT Optical Couplers

Splitters of the CPL family are produced in FBT (Fused Bioconical Tapering) technology that is based on fusing narrowed cores of optical fibers. They are characterized by large resistance to varying conditions in external networks, low insertion and reflection losses. The FBT technology allows for adjustment of split ratio and operating range to the customer’s needs.

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FBT Splitters (0,11 MB)
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Features
  • Thermal stability of parameters
  • Low insertion and polarization dependent losses
  • Wide range of housings and fiber connectors
  • Unlimited choice of power split ratio and unusual operating range
  • Versions optimized for full 1260-1650 nm band available
  • Possible custom solutions
  • Test reports with full spectral profile of attenuation available on demand
Applications
  • Passive optical networks: B-PON, G-PON, E-PON
  • Telecommunication networks
  • CATV networks
  • Measuring equipment
Types

Available splitter versions:

1x2 & 2x2:

  • Single operation window, e.g. 1310 nm ± 40 nm
  • Two operation windows, e.g. 1310/1550 nm ± 40 nm
  • Three operation windows, e.g. 1310/1550 nm ± 40 nm & 1490 ± 10 nm
  • Full 1260-1650 nm band 

1x3 & 1x4:

  • Single operation window, e.g. 1310 nm ± 40 nm
  • Two operation windows, e.g. 1310/1550 nm ± 40 nm
  • Three operation windows, e.g. 1310/1550 nm ± 40 nm & 1490 ± 10 nm

 

Example split ratios and corresponding attenuation for 1x2&2x2 splitters

Split

  Attenuation
One operation window Two operation windows Three operation windows Full band

1/99

21.0 dB/0.2 dB

23.5 dB/ 0.3 dB

 23.5 dB/0.30 dB

24 dB/0.75 dB

10/90

10.8 dB/0.6 dB

11.3 dB/ 0.6 dB

 11.5 dB/0.75 dB

11.8 dB/1.25 dB

20/80

7.60 dB/1.2 dB

7.85 dB/ 1.4 dB

 7.95 dB/1.50 dB

8.8 dB/1.8 dB

30/70

5.90 dB/1.9 dB

6.00 dB/ 1.9 dB

 6.20 dB/2.10 dB

6.7 dB/2.5 dB

40/60

 4.40 dB/2.5 dB 4.70 dB/2.7 dB 4.90 dB/2.90 dB 5.3 dB/3.3 dB

* Other ratio according to customer’s specification.

Technical Data

One operation window 1310 nm
Type 1x2/2x2 1x3 1x4

Power split

1-50%

33.3/33.3/33.3*

25/25/25/25*

Wavelengths

1310 nm or 1550 nm or others

Bandwidth

± 40 nm

Channel uniformity [dB]

≤ 0.5

≤ 1.1

≤ 1.4

Max attenuation [dB]

≤ 3.3@50/50

≤ 5.6

≤ 7.2

Max PDL [dB]

≤ 0.15

Directivity [dB]

≥ 55

Thermal stability

0.002 dB/0C

Temperature of operation

-400C to +850C

Two operation windows 1310&1550 nm
Type 1x2/2x2 1x3 1x4

Power split

1-50%

33.3/33.3/33.3*

25/25/25/25*

Wavelengths

1310 & 1550 nm or others

Bandwidth

± 40 nm

Channel uniformity [dB]

≤ 0.6

≤ 1.1

≤ 1.4

Max attenuation [dB]

≤ 3.6 @50/50

≤ 5.8

≤ 7.6

Max PDL [dB]

≤ 0.15

Directivity [dB]

≥ 55

Thermal stability

0.002 dB/0C

Temperature of operation

-400C do +850C

Three operation windows 1310&1490&1550 nm
Type 1x2/2x2 1x3 1x4

Power split

1-50%

33.3/33.3/33.3*

25/25/25/25*

Wavelengths

1310&1490&1550 nm or others

Bandwidth

± 40 nm @1310&1550 nm
± 10 nm @1490 nm

Channel uniformity [dB]

≤ 0.7

≤ 1.4

≤ 1.7

Max attenuation [dB]

≤ 3.7 @50/50

≤ 6.0

≤ 7.8

Max PDL [dB]

≤ 0.15

Directivity [dB]

≥ 55

Thermal stability

0.002 dB/0C

Temperature of operation

-400C do +850C

 

Full band 1260-1650 nm
Type 1x2/2x2

Power split

1-50%

Wavelengths

1260-1650 nm

Channel uniformity [dB]

≤ 0.9

Max attenuation [dB]

≤ 4.0 @50/50

Max PDL [dB]

≤ 0.20

Directivity [dB]

≥ 55

Thermal stability

0.002 dB/0C

Temperature of operation

-400C do +850C

* Other ratio according to customer’s specification.


Notice: Parameters listed in the table refer to components without connector terminations.

Housings

Cases:

  • 1x2/2x2 splitters, 250/900 µm cable - 3x55 mm pipe
  • 1x3/1x4 splitters, 250/900 µm cable - 3x60 mm pipe
  • 1x2/2x2 splitters, 2.0/3.0 mm cable - 90x20x10 mm housing
  • 1x3/1x4 splitters, 2.0/3.0 mm cable - 100x80x10 mm housing