CABLExpress® Cable Talk™ #11 - Fiber Optic Cable Link Loss
Today we’re going to talk about how and where fiber optic link loss happens in your data center and how that affects your structured cabling system.
Fiber Optic Link Loss
Fiber optic link loss is light that is lost, which is measured in dB, between the transmitter and the receiver. If too much light is lost then we have a loss of connection and that means downtime. And nobody wants that.
Link loss happens in 3 ways:
- fiber optic splicing
- attenuation over distance
- mated pairs
Today we’re going to focus on the mated pair because that’s the biggest culprit of light loss in the structured cabling system that is the data center. If you haven’t already, you should watch the Cable Talk™ episode on structured cabling and that will explain why it’s important.
A mated pair is when two fiber optic terminations are put together. If the cores don’t match up precisely you can have major light loss. If you could imagine trying to join two water hoses together and not having a solid coupling mechanism the water is gonna go all over the place.
That’s why having the highest precision components is critical in having a good mated pair. Three things happen at this mated pair.
One is what’s supposed to happen. The light passes through.
Two, you can get back reflection. Back reflection is when the light hits the mated pair and bounces back.
The third is when you have improperly aligned cores and the light shoots off somewhere else not getting to where it needs to go.
That’s why at CABLExpress® we use only licensed LC connectors which ensures that the fiber cores are dead center in the ferrule. And the 12 fiber MTP® connectors hold the highest standards as well. And this molded precision thermal plastic MTP® coupler ensures that all 12 fiber cores match up exactly. Ceramic adapter sleeves and ferrules ensure precision alignment as well as repeatability. As you can see, it’s critical to invest in products that offer as little light loss as possible in the mated pair.