Polarization Maintaining Fiber Optic Coupler 1x2 2x2 FBT Splitter 1310nm 1550nm

  This product is a 1*2 / 2*2 Fused PM Fiber Standard Coupler, manufactured using panda-type polarization-maintaining fiber and FBT (fused tapered) technology. It can stably distribute optical power in two communication bands: 1310nm and 1550nm. It supports multiple splitting ratios, including 50/50, 20/80, 10/90, 5/95, and 1/99, suitable for main link splitting, monitoring taps, and power combining while maintaining polarization characteristics. Typical redundant loss is ≤0.8dB, extinction ratio is ≥18dB, return loss is ≥50dB, and maximum power handling is ≤0.5W. It is available in 1*2 or 2*2 port configurations to meet the application requirements of different system architectures.

• Multiple Splitting Ratios Available, Adapting to Various Application Scenarios Standards offer splitting ratios of 50/50, 20/80, 10/90, 5/95, and 1/99. For example, with 50/50, the insertion loss is ≤3.6dB for P-class and ≤3.8dB for A-class; ≤7.8/1.6dB for 20/80 and ≤21.7/0.4dB for 1/99. This allows for flexible selection between "main service + monitoring/tap" and "uniform distribution," making power budgeting very intuitive.
• Low Redundant Loss, Less Pressure on System Power Budget Typical redundant loss is only ≤0.8dB, resulting in less impact on system OSNR and power margin when multiple devices are connected in series, which is beneficial for long-distance transmission and high-performance link design.
• Reliable polarization-maintaining performance and easy polarization direction management Utilizing Panda fiber PM13-U25A polarization-maintaining fiber, the overall extinction ratio is ≥18dB, and the default connector key alignment with the slow axis makes the polarization direction in the system easier to unify, reducing polarization-related power fluctuations and making it more suitable for polarization-sensitive applications such as coherent communication, interferometry, and polarization-maintaining amplifiers.
• High return loss and high directivity, suppressing reflection and crosstalk With a return loss ≥50dB and a directivity ≥55dB, the device effectively suppresses end-face reflections and port-to-port crosstalk, protecting the pre-stage laser, amplifier, and precision detector, and improving the long-term stability and signal-to-noise ratio of the system.
• Good environmental adaptability and power handling capacity Operating temperature range -5～+65℃, storage temperature -40～+80℃, and maximum optical power handling capacity ≤0.5W, meeting the needs of long-term online operation in computer rooms, laboratories, and general engineering environments.
• 1*2 / 2*2 Structure Options Available, Enhancing Integration Flexibility
  Both a 1*2 structure can be used as a standard splitter, and a 2*2 structure can be selected for optical path switching, redundancy, and interference structure setup. This allows equipment manufacturers and system integrators to implement multiple optical path topologies on the same platform.

• Port and Fiber Configuration

  • Port Type: 1*2 or 2*2 optional;
  • Fiber Type: Panda fiber PM13-U25A polarization-maintaining fiber;
  • Standard Pigtail Length: 1.0 ±0.1 m, custom longer or special lengths supported.

• Package Size (Different sheaths correspond to different packages)

  • 250 μm bare fiber: Steel tube package, size φ3.0 * 45 mm;
  • 0.9 mm loose tube: Steel tube package, size φ3.0 * 54 mm;
  • 2.0 / 3.0 mm loose tube: Cartridge package, size 90 * 20 * 10 mm, suitable for fixed installation in chassis trays or frames.

• Connector Types

  • Common interfaces such as FC/APC, FC/UPC are available. SC/UPC, SC/APC, LC/UPC, LC/APC, or no connector can also be configured upon request.
  • The ordering information uses a suffix code to distinguish between COM and Port connector types, facilitating the display of common combinations in a table format on the product page.

• Ordering Information Structure (briefly presented on the webpage)
  Model Format: PMFBT-XXX XXX XX XXX XX XX - X X

  • Port No: 12=1*2, 22=2*2
  • Wavelength: 131=1310nm, 155=1550nm, 980=980nm, 106=1064nm, 780=780nm
  • Splitting Ratio: 50=50/50, 90=90/10, 99=99/01, etc.
  • Module Type: ST1=φ3.0*45, ST2=φ3.0*54, SB=90*20*10 (box type)
  • Fiber Type: 02=250 μm, 09=0.9 mm, 20=2.0 mm, 30=3.0 mm
  • Fiber Length: 10=1.0 m, XX=customized
  • Connector: 0–6 or X corresponds to different connector types.

    One to two typical model examples can be provided on the product page to help customers quickly select the appropriate model.

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