Basically the 1300 nm wavelength gets all screwed up in the multimode fiber (designed ... did you try swapping/reversing one end of the fiber? Some patch cables come with one end swapped, some ...

APC and UPC connectors have been used with single mode fiber cables for decades. Traditionally, only UPC connectors have been used with multimode fiber cables for several reasons. The lasers used to ...

Patch cables are constructed using a 50–62.5-μm multimode fibers with a 0.22 NA ... be transmitted from a smaller-diameter and lower-NA fiber to a larger diameter and larger NA fiber with ...