Attenuating Splitter Branching Fiber-optic Patch Cords

Attenuating Splitter Branching Fiber-optic Patch Cords
  • Unit price per 


Ordering Code:
  • The Splitter Branching Fiber-optic Patch Cord with an integrated attenuating filter are ideal for applications where optical power coupled into a fiber is too high.   

    Fabrication of this product is similar to the standard splitter branching fiber-optic patch cords, with an additional ND filter between the splitting junction. Addition of attenuating filter does not affect light distribution inside the optical fiber, only transmission is reduced

    Note: 

    • For attenuating patch cords, optical transmission is specified for visible light, and measured at a 465 nm wavelength. Please note that for a 405 nm wavelength (UV), the transmission value is about half of the specification for visible light.


    The final power output from SBP-ATTN is attenuation factor times the output from standard SBP. For example, if we have 2x 200 µm, coupling into each output is about 16% because the input diameter core is 480 µm. If we add a 5% attenuation filter, coupling into each output will be 0.8% in reality (16% x 5% = 0.8%). 

    Optical Fiber Core Diameter
    μm )
    Number of Output Fibers
    Internal Input Optical Fibre Core Diameter μm )
    Coupling into Each Output
    100 2x 240 16% x  T
    3x 240 16%  x  T
    4x 480   4%  x  T
    7x 480    4% x  T
    200 2x 480  16% x  T
    3x 480 16%  x  T
    4x 730    7% x  T
    7x 730    7% x  T
    400 2x 960  16% x  T
    3x 960 16%  x  T
    4x 960 16% x  T
    7x 1460   7% x  T
    T refers to % transmission.


    This approach uses a 50 mm long metal tube with a 6.35 mm diameter to protect the passage from 1 to several fibers. The length of patch-cord from the metal tube to the patch-cord split, called the central jacket, can be protected using a different jacket type. Splitter patch cords are not suitable for short cables less than 30 cm long. This version allows improved splitting of laser light over older models. In all other applications, the Splitter Branching Patch Cords maintain the same high-quality performance as our legacy Standard Branching Patch Cords.

    Minimum total cable length is 35 cm.

    • The Type-A patch cords have no central jacket, with the splitter starting at the metal tube. The split is done 17.5 cm from the input.

    • The Type-B patch cords have a central jacket covering the length between the metal tube and the splitter. The split is done at 15 cm from the output.



  • Outer Diameter
    (μm)
    NA Fiber-optic Code

    Core Cladding Buffer
    Silica 100 110 125 0.22 100/110-0.22
    100 110 125 0.37 100/110-0.37
    105 125 250 0.22 105/125-0.22
    200 220 240 0.22 200/220-0.22
    200 220 245 0.37 200/220-0.37
    200 230 500 0.48 200/220-0.48
    200 230 500 0.57 200/230-0.57
    400 440 480 0.22 400/440-0.22
    400 440 470 0.37 400/440-0.37
    400 430 730 0.48 400/430-0.48
    400 430 730 0.57 400/430-0.57
    Plastic 240 250 - 0.63 240/250-0.63
    480 500 - 0.63 480/500-0.63


  • Termination Codes for Fiber-Optic Patch cords
    Description Product Termination Code
    FC Connector with Metal Ferrule FCM
    SMA Connector with Metal Ferrule SMA


  • Splitter Branching Patch Cord
      Drawing