Fiber splicing

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General Disarray

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Fiber splicing
« on: April 27, 2013, 04:56:33 PM »
We had a guy from Comcast come in to my work today to terminate a new fiber line for the business, and he was cool enough to show us the whole process and explain everything. I didn't get to see much of the prep work, but it's pretty much gradually stripping off the outer layers, and organizing the wires in a way that would allow you to easily pull back more slack in case it's needed later.

He installed a box in one of our network racks, and connected short pre-terminated fiber wires to the inside of the relay that would eventually connect to our networking equipment. The other side of these wires are what was getting spliced to the cable that leads outside the building.

Once he got the ends down to the bare fiber, he used a cleaving tool to get a good edge that could be easily spliced. After this, he told us that you are supposed to use really pure alcohol to clean the ends of the wire, but he just used his fingers after wiping them on his jeans...

The machine he used to actually splice the wires together is really cool. You load the wires into it facing each other to where they almost meet in the middle, close the lid, and it does the rest. It uses tiny cameras to precisely align the two ends, maneuver them to where they are just barely touching, then the electrodes heat them up and fuse them together. #" class="bbc_link" target="_blank" rel="noopener noreferrer">This video is pretty close to what it's like. You see pictures of the ends as they are lined up, a bright light, then it's just one cable. It displays the estimated signal loss after it's done, this guy got 0.01 and 0.00 dB loss on the two I watched.

To secure the splice, he put this sleeve of 'shrink wrap' around it, placed it into a mini-oven that was part of the machine for a few seconds, and it's done.

I thought it was pretty cool. I took a short course in how to terminate fiber, but we didn't have anything that high-tech.
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Re: Fiber splicing
« Reply #1 on: May 01, 2013, 03:24:39 PM »
A fusion splicer.  So much more efficient than manual splicing and polishing.