I recently watched my coworker disassembling a pc using only one tool. Was it the right tool for the job? Yes and no. It was the tool he had… it worked, however, there is definitely several tool out there that could have made the task easier! This example is definitely one that many fiber optic installers know all too well. As a gentle reminder, what percentage of you might have used your Splicer’s Tool Kit (cable knife/scissors) to remove jacketing or even slit a buffer tube and then utilize the scissors to hack away at the Kevlar? Did you nick the glass? Did you accidentally cut through the glass and have to start over?
Correctly splicing and terminating SZ stranding line requires special tools and methods. Training is very important and there are lots of excellent sources of training available. Tend not to mix your electrical tools with your fiber tools. Utilize the right tool to do the job! Being proficient in fiber work can become increasingly necessary as the significance of data transmission speeds, fiber to the home and fiber for the premise deployments still increase.
Many factors set fiber installations apart from traditional electrical projects. Fiber optic glass is very fragile; it’s nominal outside diameter is 125um. The slightest scratch, mark or perhaps speck of dirt will change the transmission of light, degrading the signal. Safety factors are important simply because you will work with glass that can sliver to your skin without having to be seen from the human eye.
Transmission grade lasers are very dangerous, and require that protective eyewear is important. This industry has primarily been coping with voice and data grade circuits that may tolerate some interruption or decelerate of signal. Anyone speaking would repeat themselves, or the data would retransmit. Today we have been coping with IPTV signals and customers who will not tolerate pixelization, or momentary locking from the picture. All of the situations mentioned are cause for the consumer to find another carrier. Each situation could have been avoided if proper attention was provided to the strategies used in planning, installing, and looking after FTTH cable production line.
With that in mind, why don’t we review basic fiber preparation? Jacket Strippers are utilized to take away the 1.6 – 3.0mm PVC outer jacket on simplex and duplex fiber cables. Serrated Kevlar Cutters will cut and trim the kevlar strength member directly under the jacket and Buffer Strippers will take away the acrylate (buffer) coating through the bare glass. A protective plastic coating is applied to the bare fiber following the drawing process, but just before spooling. The most common coating is really a UV-cured acrylate, that is applied in two layers, resulting in a nominal outside diameter of 250um for the coated fiber. The coating is very engineered, providing protection against physical damage caused by environmental elements, such as temperature and humidity extremes, contact with chemicals, reason for stress… etc. while also minimizing optical loss.
Without this, the manufacturer would be unable to spool the fiber without having to break it. The 250um-coated fiber will be the building block for many common fiber optic cable constructions. It is often used as it is, specially when additional mechanical or environmental protection is not needed, such as inside of optical devices or splice closures. For extra physical protection and simplicity of handling, a secondary coating of polyvinyl chloride (PVC) or Hytrel (a thermoplastic elastomer that has desirable characteristics to use as being a secondary buffer) is extruded on the 250um-coated fiber, enhancing the outside diameter up to 900um. This sort of construction is known as ‘tight buffered fiber’. Tight Buffered may be single or multi fiber and they are noticed in Premise Networks and indoor applications. Multi-fiber, tight-buffered cables often can be used for intra-building, risers, general building and plenum applications.
A ‘Rotary Tool’ or ‘Cable Slitter’ can be used to slit a ring around and through the outer jacketing of ‘loose tube fiber’. Once you expose the durable inner buffer tube, you can use a ‘Universal Fiber Access Tool’ which is made for single central buffer tube entry. Used on the same principle as the Mid Span Access Tool, (that enables accessibility multicolored buffer coated tight buffered fibers) dual blades will slit the tube lengthwise, exposing the buffer coated fibers. Fiber handling tools such as a spatula or even a lqzgij may help the installer to access the fiber looking for testing or repair.
When the damaged fiber is exposed a hand- stripping tool will be employed to eliminate the 250um coating so that you can work with the bare fiber. The next phase will likely be cleaning the optical fiber proof-testing machine and preparing it to be cleaved. A good cleave is among the most significant factors of producing a low loss on the splice or even a termination. A Fiber Optic Cleaver is a multipurpose tool that measures distance from your end of the buffer coating to the point where it will probably be joined plus it precisely cuts the glass. Remember to employ a fiber trash-can for that scraps of glass cleaved off of the fiber cable.