Cisco Mode Conditioning Fiber Optic Patch Cord, CAB-GELX-625, 3M
A mode-conditioning patch cord can be used to allow reliable laser transmission between the single-mode laser source on the GBIC and a multimode optical fiber cable.
When an unconditioned laser source designed for operation on single-mode optical fiber is directly coupled to a multimode optical fiber cable, an effect known as differential mode delay (DMD) might result in a degradation of the modal bandwidth of the optical fiber cable.
This degradation results in a decrease in the link span (the distance between a transmitter and a receiver) that can be supported reliably. The effect of DMD can be overcome by conditioning the launch characteristics of a laser source. A practical means of performing this conditioning is to use a device called a mode-conditioning patch cord such as this one.
Length: 3 Meters (9.84 feet)
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