FBT Coupler

FBT Coupler

GKoptic offers fiber optic couplers/splitters. These are availabe in Single Mode or Multimode. Splitters with a defined split ratio from one or two input fibers to 2 output fibers. The available split counts are 1×2 and 2×2 or 1×4 1X8 in split ratios of: 50/50, 40/60, 30/70, 20/80, 10/90, 5/95, 1/99, 60/40, 70/30, 80/20, 90/10, 95/5, and 99/1. Dual Window Couplers are availble with 900µm loose tube single mode fiber or 250µm bare fiber and terminated or unterminated as per your needs. Unconnectorized DWC’s come with no connectors for easy splicing or connectorization. Connectorized DWC’s are available with your choice of Fiber Optic Connectors: LC/UPC, LC/APC, SC/UPC, SC/APC, FC/UPC, FC/APC, and ST/UPC.



  • Telecommunications
  • CATV Fiberoptic Links
  • Fiber Amplifier System
  • Fiberoptic Instrumentation


  • Excellent Uniformity
  • Single wavelength or Dual wide wavelength band
  • Low Excess Loss
  • Low Polarization Sensitivity
  • Highly Stable & Reliable
  • Ultra Low Cost

Technical Details:

Port Configuration N×4
N=1, 2, 4
N=1, 2, 8
N=1, 2, 16
N=1, 2, 32
Operating Wavelength 1310nm and 1550nm
Bandwidth ±40nm
Excess Loss 0.3dB 0.5dB 0.7dB 0.9dB
Typical Insertion Loss 6.4dB 9.6dB 12.8dB 16.0dB
Max. Insertion Loss 7.0dB 10.6dB 14.1dB 17.5dB
PDL ≤0.2dB ≤0.3dB ≤0.4dB ≤0.5dB
Uniformity 1.2dB 1.8dB 2.3dB 3.0dB
Thermal Stability ≤0.2dB ≤0.3dB ≤0.4dB ≤0.5dB
Directivity ≥55dB
Return Loss ≥55dB
Fiber Type Corning SMF-28
Fiber Length 1 meter or customized
Cable Diameter 900um loose tube, 2.0mm cable, 3.0mm cable
Package Dimension 100×80×10mm 100×80×
Operating Humidity ≤93%RH
Storage Humidity ≤93%RH
Operating Temperature -40~+85°C
Storage Temperature -40~+85°C

Product Photos:

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