NxN PM Fused Fiber Coupler (Polarization Maintaining)
Multiport NxN Polarization-Maintaining Fused Fiber Coupler (2x4, 4x4, 8x8) manufactured with cascaded fused biconical taper technology. Provides symmetric power distribution across all ports while preserving polarization state with high extinction ratio (>18 dB) across 780nm to 1550nm.
Technical Specifications
Parameter
Specification
Unit
Port Configuration
2x4, 4x4, 8x8
-
Center Wavelength
1550, 1310, 1064, 980, 850, 780
nm
Operating Bandwidth
±15 (1310/1550), ±10 (780-1064)
nm
Splitting Ratio
Even split (1/N)
%
Max. Insertion Loss (4x4)
7.8 (1310/1550), 8.2 (1064/980), 8.8 (780/850)
dB
Max. Insertion Loss (8x8)
11.2 (1310/1550), 11.8 (1064/980), 12.5 (780/850)
dB
Max. Uniformity
1.0 (4x4), 1.5 (8x8)
dB
Min. Extinction Ratio @ 23°C
18 (Slow axis), 16 (Fast axis blocked)
dB
Min. Return Loss
50
dB
Max. Optical Power (CW)
500
mW
Fiber Type
PM Panda Fiber on all ports
-
Operating Temperature
-40 to +85
°C
Package Dimensions
100 x 80 x 10 mm
mm
Technical Datasheet Note
Ruggedized aluminum casing protects internal fiber splices and ensures thermal equilibrium. Connectors add 0.3 dB insertion loss.
Ruggedized aluminum casing protects internal fiber splices and ensures thermal equilibrium. Connectors add 0.3 dB insertion loss.
Configuration and ordering notes
Configuration parameters include port count (e.g. 4x4, 8x8), operating wavelength, and whether tap ports require unequal splitting.
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
Multi-axis fiber optic gyroscope networks; Coherent optical matrix switching; Multichannel interferometry; Quantum state distribution.
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.