10G Base LR: It's a type of fiber standard that runs a 10 gigabits. and looks like this
QSFP 40G: It's a DIFFERENT type of fiber standard that runs at 40 gigs and looks like this
I only know the basics of fiber networking but I know that different standards are needed because light refracts differently depending on cable thickness and composition, so standards/variations of the same standard have different maximum length, bandwidth, collision detection, etc.
For example, the type of fiber that you use to connect two offices that are 10 miles apart is going to be very different than the fiber you use to connect your SAN storage to your baremetal ESXI servers.
In essence, OP is asking if he can connect his phone line to the port on the back of the computer, and the answer is "Yes, but it's not that simple, and you probably don't want to do that anyways"
In a way I'm glad this time around we're building our OWN instead of jumping into another centralized platform. If it happens again, we can just shard off and host out own instance and still follow all our favorite communities etc .... @Paesan