FBT Multimode Fiber Coupler

FBT Multimode Fiber Coupler

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FBT Multimode Fiber Coupler

Fused Biconic Taper (FBT) coupler, also be called FBT splitter, based on the traditional technology, it is to bundle together two or more optical fibers, and then pull the cone machine melt stretching, and real-time monitoring the change of the ratio, spectral ratio requirements after melt stretching, one side retain a single fiber (the rest of the cut) as input, the other end is a multi-channel output.

As one of the key components for GPON FTTx networks, optical splitters can be placed in the Central Office or in one of the distribution points (outdoor or indoor) because the FBT coupler are highly stable for multiport optical signal splitting with low insertion loss. FBT couplers are designed for power splitting and tapping in telecommunication equipment, CATV network, and test equipment

OMC’s Multimode Fiber Optic Coupler(MM FBT Coupler ) are fabricated from multimode fibers with core diameters of 50um ,62.5um or 100um. Standard multimode couplers are commonly used in short distance communications with LED sources operating at 1310nm or 850nm. Multimode couplers are wavelength independent over a broad range of wavelengths (600nm to 1610nm) with uniform modal power distribution launch condition, multimode tree/star couplers NX4(n=1,2,4) NX8(n=1,2,8) NX16(n=1,2,16) port ratios are available.

Key Features

  • Low Excess Loss
  • Uniform Power Splitting
  • Rugged PackageExcellent
  • Environmental & Mechanical Stability

Applications

  • Long-haul Telecommunications
  • Digital, Hybrid and AM-Video Systems
  • CATV Systems
  • High Speed Local Area Networks
  • Fiber Sensors

Performance Specifications

Parameter

Multimode Standard Fiber Couplers

Coupling Ratio(%)

50/50

Grade

P Grade

A Grade

Excess Loss (Typical)(dB)

0.7

1.0

Max.lnsertion Loss(dB)

4.2

4.5

Uniformity (Max.)(dB)

0.6

0.8

Directivity(Min.)(dB)

35

Operating Wavelength(nm)

800-1600

Central Wavelength (nm)

850 or 1310 or 1550

Operating Temperature(℃)

-20~+85

Fiber Type

Corning multimode 50/125, 62.5/125

Fiber Pigtail Length(m)

1 m or custom length

Port Configuration

1×2 or 2×2

Dimensions (mm)

Package D,E,G

Coupling Ratio/insertion Loss Conversion Chart

Coupling Ratio

lnsertion Loss

Premium

A Grade

40/60

5.2/3.3

5.6/3.7

30/70

6.5/2.6

7.0/3.0

20/80

8.4/2.0

8.8/2.5

10/90

11.8/1.5

12.3/2.0

*Measured under the stable mode condition with LED light source.


The relation picture of Insertion Loss & Wavelength
Temperature

11

Package Dimensions & Pigtail Style

Package Dimensions:

Package D:

3mm x 45mm stainless steel tube

Package E:

3mm x 54mm stainless steel tube

Package F:

3mm x 60mm stainless steel tube

Package G:

10mm x 20mm x 90mm case

Pigtail Style:

Package D,E:

250um bare fiber

Package F

250um bare fiber or 900um loose tube

Package G:

2mm,3mm cable or 900um loose tube

 

Order Information

A

Port Number

12=1 x 2, 22=2 x 2, 13=1 x 3, 33=3 x 3, 14=1 x 4, 44=4 x4, 15=1 x 5, 55=5 x5, 16=1 x6, 66=6 x6, 17=1 x7, 77=7 x7, 18=1 x8,88=8 x8, 19=1 x 9, 99=9×9, 110=1 x10,1010=10×10, 111=1 x11, 1111=11×11, 112=1 x12, 1212=12×2, 131=1 x 13, 1313=13 x13, 114=1 x14, 1414=14×14, 115=1 x15, 1515=15 x15, 116=1 x16, 1616=16 x16, 3232=32×32

B

Fiber type

1= 50/125,2=62.5/125

C

Wavelength

850nm, 1310nm, 1550nm

D

Coupling Ration(01~50)

1/99 ~ 50/50~ Tree Coupler

E

Pigtail Type

1=250um Bare Fiber

2=900um Loose Tube

3=2mm Cable

4=3mm Cable

F

Encapsulation Size(mm)

Package D

Package E

Package F

Package G

G

Pigtail Length(for each port)

1=1m

2=1.5m

3=Customer Length

HI

Connector(Input/output)

FP=FC/PC

FA=FC/APC

SP=SC/PC

SA=SC/APC

ST=ST/PC

LP=LC/PC

LA==LC/APC

00=None

CS=Customer Specified

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