Single Window Fused Fiber Coupler (FSMC, 1310nm or 1550nm)
Standard Single Window Fused Single-Mode Fiber Coupler (FSMC) operating at either 1310nm or 1550nm with narrowband transmission (±15nm). Offers ultra-low excess loss (<=0.08 dB), exceptional stability, and low cost for single-wavelength optical links.
Technical Specifications
Parameter
Specification
Unit
Center Wavelength
1310 or 1550
nm
Operating Bandwidth
±15
nm
Port Configuration
1x2 / 2x2
-
Coupling Ratio Options
01/99, 05/95, 10/90, 20/80, 50/50
%
Max. Insertion Loss (50/50)
3.3 (A Grade), 3.5 (P Grade)
dB
Max. Excess Loss
0.08 (A Grade), 0.12 (P Grade)
dB
Max. Polarization Dependent Loss
0.06 (50/50), 0.08 (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
Optimized specifically for single-wavelength systems where multi-window capability is not needed, delivering lowest insertion loss.
Optimized specifically for single-wavelength systems where multi-window capability is not needed, delivering lowest insertion loss.
Configuration and ordering notes
Operating window and coupling ratio form the configuration basis. The specification table lists the supported wavelength conditions.
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
Dedicated single-wavelength fiber communication; CATV optical nodes; Optical power sampling; Laboratory optical bench setups.
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.