FIBERCAN mode conditioning patch cord is needed when both single-mode and multimode interconnects must be maintained at the same time, such as LX/ LHGBIC.
When an unconditioned laser source operates on a single-mode fiber cable directly coupled to an MMF cable, an effect known as differential mode delay(DMD) might occur. DMD can degrade the modal bandwidth of the fiber optic cable, decreasing link span that could have been reliably supported.
The solution is to launch light from the laser at a precise offset from the centre, which is accomplished by using the mode conditioning cables. The offset point creates launches similar to typical multimode LED launches.