Fiber Optic Glossary : J


  • Jacket
    The protective outer coating of the cable.
  • Jacket Insulation
    Insulating material around a wire or cable.
  • JIT
    An abbreviation for just in time.
  • Jitney
    Low cost optical link.
  • Jitter
    Also called phase jitter, timing distortion, or inter-symbol interference. The slight movement of a transmission signal in time or phase...
  • Jitter Data Dependent (DDJ)
    Jitter that is related to the transmitted symbol sequence. DDJ is caused by the limited bandwidth characteristics, non-ideal individual pulse responses,...
  • Jitter Deterministic (DJ)
    Timing distortions caused by normal circuit effects in the transmission system. Deterministic fitter is often subdivided into duty cycle distortion (DCD)...
  • Jitter Duty Cycle Distortion (DCD)
    Distortion usually caused by propagation delay differences between low-to-high and high-to-low transitions. DCD is manifested as a pulse width distortion of...
  • Jitter Random (RJ)
    Jitter due to thermal noise which may be modeled as a Gaussian process. The peak-to-peak value of random jitter is of...
  • Joule
    One watt per second; a measurement frequently given for laser output in pulsed operation.
  • Jumper
    Fiber optic cable with the connectors on the both ends.
  • Jumper Cable
    A short single fiber cable with connectors on both ends used for interconnecting other cables or testing. Jumper cables connect...
  • Junction
    The intersection of three or more bundles from different directions in a harness assembly.
  • Junction Laser
    A semiconductor diode laser.

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