Triple Window Fused Fiber Coupler (TWFC, 1310/1490/1550nm)
Triple Window Fused Single-Mode Fiber Coupler (TWFC) engineered for PON and triple-play networks operating across 1310nm (voice/upstream), 1490nm (data downstream), and 1550nm (video/CATV). Delivers low excess loss, low PDL, and high directivity across all three transmission windows.
Technical Specifications
Parameter
Specification
Unit
Operating Wavelengths
1310, 1490, and 1550 Triple Window
nm
Operating Bandwidth
±20 (1310/1490/1550)
nm
Port Configuration
1x2 / 2x2
-
Coupling Ratio Options
01/99, 05/95, 10/90, 20/80, 50/50
%
Max. Insertion Loss (50/50)
3.6 (A Grade), 3.9 (P Grade)
dB
Max. Excess Loss
0.15 (A Grade), 0.20 (P Grade)
dB
Max. Polarization Dependent Loss
0.10 (50/50), 0.12 (Tap ratios)
dB
Min. Directivity
55
dB
Min. Return Loss
55
dB
Max. Optical Power (CW)
1000
mW
Fiber Type
Corning SMF-28e+ Fiber
-
Operating Temperature
-40 to +85
°C
Package Dimensions
dia. 3.0 x 40 mm / dia. 3.0 x 54 mm / dia. 3.0 x 60 mm
mm
Technical Datasheet Note
Triple window design ensures identical split ratios at 1310nm, 1490nm, and 1550nm for GPON/EPON networks.
Triple window design ensures identical split ratios at 1310nm, 1490nm, and 1550nm for GPON/EPON networks.
Configuration and ordering notes
Configuration parameters include port count (1x2 or 2x2), splitting ratio, and whether SC/APC or LC/APC pigtails are required for FTTx deployment.
Selection Guidance: Review extinction ratio formulas, axis alignment, and splicing tolerances in our PM Fiber Components & Extinction Ratio Guide ↗ or Fiber Polarizer Selection Guide ↗.
Key Applications
GPON and EPON access networks; Triple-play telecom architectures; CATV optical receiver distribution; Multi-wavelength test beds.
Package Drawing
Need an exact configuration?
A quotation review can begin with the application, quantity and available component information. Wavelength, optical power, fiber and termination details can be clarified with engineering.