CABLExpress® Cable Talk™ #17 - Parallel Optics
Today we’re gonna talk about parallel optics.
Before we do that I want to explain serial transmission, which is commonly used for 1 gigabit and 10 gigabit connections, which involves the asset peak small form pluggable (SFP), and LC fiber optic connectivity.
Serial transmission is much like a two-lane highway; from the transceiver you have send traffic going one way and you have to receive traffic going the other way. But at the current state of optical technology you can’t get much past 10 gigabit. So how do we go faster? The answer is parallel optics.
Enter the MPO style connector or MTP®. If you see in there - there’s 12 fibers and this is what’s gonna take us to 40 gigabit. And then the 24 fiber which takes us to 100 gigabit. This might be a little hard to see but this is one of our Skinny-Trunk® 24 connectors. There are 24 fibers in that same MTP® ferrule. So back to the highway analogy, here we have kind of a visual of 40 gigabit Ethernet. Each lane that you see is 10 gigabit. Four lanes of 10 gigabit equal 40 gigabit. You have transmit and you have receive - both at 40 gigabit. And here’s a visual representation of the front of the MTP® connector, just to show it in a little bit more detail.
So here you have the red dots. Those are representing 10 gigabit transmit channels right there on this outer side and the green would be your receive. Just gives you another image of it. Here’s a representation of parallel optics for 100 gigabit Ethernet. Now we’re using the 24 fiber MTP® as we showed before and as you can see you have 10 across the top with red which would be your transmit. That’s ten 10 gigabit lengths which would be 100 gigabit and then the same on the bottom for receive. Some key take-aways are the MPO connector or MTP® connector, you’re gonna have to use this, and as the speeds go up insertion losses go down. So make sure your optical infrastructure can handle it.