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Recently i 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 more than one tool out there that would have made the task easier! This situation is certainly one that many fiber optic installers know all too well. As being a gentle reminder, how many of you might have used your Splicer’s Tool Kit (cable knife/scissors) to remove jacketing or even slit a buffer tube and then make use of the scissors to hack away at the Kevlar? Did you nick the glass? Did you accidentally cut through the glass and need to start over?
Correctly splicing and terminating optical fiber proof-testing machine requires special tools and methods. Training is essential and there are numerous excellent sources of training available. Usually do not mix your electrical tools with your fiber tools. Use the right tool for the job! Being familiar with fiber work will end up increasingly necessary as the value of data transmission speeds, fiber to the home and fiber for the premise deployments continue to increase.
Many factors set fiber installations aside from traditional electrical projects. Fiber optic glass is quite fragile; it’s nominal outside diameter is 125um. The least scratch, mark or even speck of dirt will affect the transmission of light, degrading the signal. Safety factors important because you are working with glass that can sliver into your skin without getting seen by the human eye.
Transmission grade lasers are extremely dangerous, and require that protective eyewear is essential. This industry has primarily been coping with voice and data grade circuits that may tolerate some interruption or decelerate of signal. The person speaking would repeat themselves, or the data would retransmit. Today we have been coping with IPTV signals and customers who can not tolerate pixelization, or momentary locking from the picture. All of the situations mentioned are cause of the client to look for another carrier. Each situation might have been avoided if proper attention was provided to the techniques used when preparing, installing, and maintaining optical fiber proof-testing machine.
Having said that, why don’t we review basic fiber preparation? Jacket Strippers are utilized to remove 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 from the bare glass. A protective plastic coating is applied towards the bare fiber after the drawing process, but prior to spooling. The most frequent coating is really a UV-cured acrylate, that is applied in 2 layers, resulting in a nominal outside diameter of 250um for that coated fiber. The coating is very engineered, providing protection against physical damage due to environmental elements, such as temperature and humidity extremes, exposure to chemicals, reason for stress… etc. while minimizing optical loss.
Without this, the producer would be unable to spool the fiber without breaking it. The 250um-coated fiber will be the building block for most common fiber optic cable constructions. It is often used as it is, specially when additional mechanical or environmental protection is not required, such as inside of optical devices or splice closures. For further physical protection and simplicity of handling, a secondary coating of polyvinyl chloride (PVC) or Hytrel (a thermoplastic elastomer which has desirable characteristics to use as a secondary buffer) is extruded on the 250um-coated fiber, increasing the outside diameter approximately 900um. This sort of construction is called ‘tight buffered fiber’. Tight Buffered might be single or multi fiber and they are observed in Premise Networks and indoor applications. Multi-fiber, tight-buffered cables often are used for intra-building, risers, general building and plenum applications.
A ‘Rotary Tool’ or ‘Cable Slitter’ could be used to slit a ring around and thru the outer jacketing of ‘loose tube fiber’. As soon as you expose the durable inner buffer tube, you can use a ‘Universal Fiber Access Tool’ which is designed for single central buffer tube entry. Used on the same principle because 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 perhaps a lqzgij may help the installer to access the fiber in need of testing or repair.
After the damaged fiber is exposed a hand- stripping tool will be used to remove the 250um coating so that you can work with the bare fiber. The next phase will be cleansing the SZ stranding line and preparing that it is cleaved. An excellent cleave is probably the most significant factors of making a low loss on the splice or even a termination. A Fiber Optic Cleaver is really a multipurpose tool that measures distance through the end in the buffer coating to the level where it will likely be joined and it also precisely cuts the glass. Never forget to use a fiber trash-can for the scraps of glass cleaved off the fiber cable.