Fiberdyne Labs, Inc. Introduction to Mode-conditioning Patch Cord (Jumper)

Introduction to Mode-conditioning Patch Cords


    Fiberdyne Labs manufactures mode-conditioning patch cords, using high-quality, single-mode/multimode fiber and connectors. These cable assemblies are primarily used in Gigabit Ethernet (1000Base-LX) applications. Their use prevents DMD (Differential Mode Delay), and allows a singlemode signal to travel over Multimode fiber. IEEE Std 802.3 specifies the use and format for mode-conditioning patch cords.
    Generally a mode-conditioning cable is required at each end of the fiber run so they are usually ordered in pairs or even numbers.


    Fiberdyne uses state-of-the-art equipment in every manufacturing and inspection phase, ensuring each assembly meets our applicable ISO 9001 standards.


Cable Jacket Colors:
  • - Yellow on Singlemode Fiber the equipment transmit section
  • - Orange on Multimode Fiber sections


Connector Types:
  • - LC, SC, ST, FC, MT-RJ


Description Units Value
Fiber Type µm Single-mode (9/125) Multimode (50 or 62.5/125)
Insertion Loss (Transmit) dB < 0.8
Insertion Loss (Receive) dB < 0.5 (0.35 Typical)
Return Loss dB > 50 (55 Typical)
Radius of Curvature mm 7 to 25
Apex Offset µm < 50
Fiber Height nm < 100
Repeatability Cycles > 500
Operating Temperature °C -40 to +75
Humidity Range (Non-condensing) % 5 to 95
Standards Compliance   IEEE Std 802.3


New York

Fiberdyne Labs manufactures fiber optic products in a variety of configurations. Call your Fiberdyne Sales Representative at 800-894-9694 or email us at

Technical Data:

Mode-conditioning Products