FBT Coupler

INF 1X2, 2X2 SM FBT Coupler

SC LC FC 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


A&T's FBT Singlemode coupler 1X2 2X2 offer very low insertion loss, low polarisation dependence and excellent environmental stability Accurate coupling ratio from 50/50 to 1/99 and fiber type 250um bare fiber, 3mm and 900um loose tube fiber are available with very tight uniformity. Singlemode standard coupler and wideband coupler components find extensive application to perform power splitting and monitoring functions in all kinds of optical communication systems.

Features:

  • Low PDL
  • High Stability
  • High Directivity
  • Environmentally stable
  • Small package dimension
  • Low Polarization dependence
  • Low Insertion Loss and High Return Loss

Applications:

  • CATV
  • LAN & WAN
  • Telecommunication networks

Standards:

  • Telcordia GR-1209and GR-1221
Reliability Tests:
Tension 0.23kg, 1 minute
Impact 1.8m height, 3 axes, 8 times per axis
Vibration 10Hz~ 55Hz, amplitude 1.52mm, 3 axes, 4 hours per axis
Low Temperature -40±5°C, 5,000 hours
High Temperature 85±2°C, 5,000 hours
Water Immersion 43±2°C /PH5.5±0.5, 168 hours
Warm and Humidity 75±2°C/90±5%RH, 5,000 hours
Temperature Cycling -40±2°C~85±2°C, 300 periods, 2,400 hours
Single Window:
Specifications:
Port Configuration 1×2 2×2
Operating Wavelength 1310nm or 1550nm
Bandwidth ±20nm
Coupling Ratio 1~50
Excess Loss ≤0.15dB
PDL ≤0.15dB
Thermal Stability ≤0.1dB/°C
Directivity ≥55dB ≥60dB
Uniformity ≤0.8dB
Return Loss ≥55dB
Fiber Type Corning SMF-28
Fiber Length 1 meter or customized
Cable Diameter 250um bare fiber 900um loose tube
Package Dimension Φ3×54mm Φ3×60mm
Operating Humidity ≤93%RH
Storage Humidity ≤93%RH
Operating Temperature -40~+85°C
Storage Temperature -40~+85°C

Note: Wide bandwidth of ±40nm is available at customers’ request.

Coupling Ratio and Insertion Loss:
Coupling Ratio (100%) Insertion Loss
Typical Maximum
1/99 20.8/0.2 21.6/0.3
2/98 19.0/0.2 20.0/0.3
3/97 16.5/0.3 17.0/0.4
5/95 14.1/0.3 14.9/0.6
10/90 10.6/0.6 11.3/0.9
15/85 8.6/0.8 9.3/1.1
20/80 7.3/1.1 7.9/1.4
25/75 6.3/1.4 6.8/1.7
30/70 5.5/1.7 6.0/2.0
35/65 4.8/2.1 5.3/2.4
40/60 4.2/2.4 4.7/2.8
45/55 3.7/2.8 4.2/3.3
50/50 3.2/3.2 3.7/3.7
Dual Windows:
Specifications:
Port Configuration 1×2 2×2
Operating Wavelength 1310nm and 1550nm
Bandwidth ±40nm
Coupling Ratio 1~50
Excess Loss ≤0.15dB
PDL ≤0.15dB
Thermal Stability ≤0.1dB/°C
Directivity ≥55dB ≥60dB
Uniformity ≤0.8dB
Return Loss ≥55dB
Fiber Type Corning SMF-28
Fiber Length 1 meter or customized
Cable Diameter 250um bare fiber 900um loose tube
Package Dimension Φ3×54mm Φ3×60mm
Operating Temperature -40~+85°C
Storage Temperature -40~+85°C
Operating Humidity ≤93%RH
Storage Humidity ≤93%RH
Coupling Ratio and Insertion Loss:
Coupling Ratio (100%) Insertion Loss
Typical Maximum
1/99 21.5/0.2 22.0/0.3
2/98 18.5/0.24 19.1/0.35
3/97 16.5/0.31 17.0/0.41
5/95 14.1/0.39 14.9/0.52
10/90 10.9/0.64 11.5/0.8
15/85 8.6/1.0 9.0/1.1
20/80 7.6/1.2 8.1/1.3
25/75 6.3/1.4 6.8/1.7
30/70 5.6/1.9 6.0/2.0
35/65 4.892.1 5.3/2.4
40/60 4.2/2.4 4.7/2.8
45/55 3.7/2.8 4.0/3.1
50/50 3.4/3.4 3.6/3.6
Triple Windows:
Specifications:
Port Configuration 1×2 2×2
Operating Wavelength 1310nm, 1490nm and 1550nm
Bandwidth 1310/1550±40nm, 1490±10nm
Coupling Ratio 1~50
Excess Loss ≤0.07dB
PDL ≤0.15dB
Thermal Stability ≤0.1dB/°C
Directivity ≥55dB ≥60dB
Uniformity ≤0.8dB
Return Loss ≥55dB
Fiber Type Corning SMF-28
Fiber Length 1 meter or customized
Cable Diameter 250um bare fiber 900um loose tube
Package Dimension Φ3×54mm Φ3×60mm
Operating Humidity ≤93%RH
Storage Humidity ≤93%RH
Operating Temperature -40~+85°C
Storage Temperature -40~+85°C
Coupling Ratio and Insertion Loss:
Coupling Ratio (100%) Insertion Loss
Typical Maximum
1/99 21.5/0.2 22.5/0.25
2/98 18.5/0.24 18.8/0.3
3/97 16.5/0.31 17.0/0.41
5/95 14.1/0.39 14.6/0.44
10/90 10.9/0.64 11.3/0.66
15/85 8.6/1.0 9.0/1.1
20/80 7.6/1.2 8.0/1.2
25/75 6.3/1.4 6.8/1.7
30/70 5.6/1.9 6.0/1.9
35/65 4.892.1 5.3/2.4
40/60 4.2/2.4 4.7/2.7
45/55 3.7/2.8 4.0/3.1
50/50 3.4/3.4 3.6/3.6

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