Why do you need Secondary Coating Line and what can it do for you If you have ever seen a telephone company technician working on the phone jump box outside your home, you need to have noticed an exclusive handheld phone like instrument. The technician uses it to distinguish the incoming telephone wires by tapping onto the wires and listening for a tone. Once he finds the correct wire, he connects the wire in your house.

During fiber optic network installation, maintenance, or restoration, it is also often required to identify a specific fiber without disrupting live service. This battery powered instrument seems like a long handheld bar and is also called fiber identifier or live fiber identifier.

So how exactly does it work? There exists a slot on the top of a fiber optic identifier. The fiber under test is inserted in to the slot, then your fiber identifier performs a macro-bend on the fiber. The macro-bend makes some light leak out from the fiber as well as the optical sensor detects it. The detector can detect both the existence of light and also the direction of light.

A fiber optic identifier can detect “no signal”, “tone” or “traffic” and in addition it indicates the traffic direction.

The optical signal loss induced by this method is so small, usually at 1dB level, which it doesn’t cause any trouble on the live traffic.

What kind of Fiber Drawing Machine does it support? Fiber optic identifiers can detect 250um bare fibers, 900um tight buffered fibers, 2.0mm fiber cables, 3.0mm fiber cables, bare fiber ribbons and jacketed fiber ribbons.

Most fiber identifiers have to change a head adapter so that you can support all most of these fibers and cables. While many other models are cleverly designed plus they don’t need to alter the head adapter whatsoever. Some models only support single mode fibers and others can support both single mode and multimode fibers.

What exactly is relative power measurement? Most high end fiber optic identifiers include a LCD display which could display the optical power detected. However, this power measurement cannot be used as a accurate absolute power measurement in the optical signal as a result of inconsistencies in fiber optic cables and the impact of user technique on the measurements.

But this power measurement can be used to compare power levels on different fiber links that have same type of fiber optic cable. This relative power measurement has many applications as described below.

Sample applications

1. Identification of fibers

The relative power reading can be used to aid in the identification of a live optical fiber.There are several tests that may be performed to isolate the preferred fiber cable from a group of fibers without taking down the link(s). Three methods that could be used include comparing relative power, inducing macrobends, and varying the optical power in the source. No single strategy is best or necessarily definitive. Using one or a combination of these techniques may be required to isolate the fiber.

2. Identification of high loss points

Fiber optic identifier’s relative power measurement capability may be used to identify high loss point(s) in a period of fiber. By taking relative power measurements along a section of optical fiber which is suspected of getting a higher loss point like a fracture or tight bend, the alteration in relative power point out point can be noted. When a sudden drop or boost in relative power between two points is noted, a high loss point probably exists between the two points. The user are able to narrow in on the point if you take further measurements between the two points.

3. Verify optical splices and connectors

Fiber optic identifier can be used to verify fiber optic connectors and splices. This test should be performed over a lit optical fiber. The optical fiber may be carrying a transmission or even be illuminated using an optical test source. Attach fiber identifier to a single side from the optical connector/splice. Read and record the relative optical power. Repeat the measurement on the second side of the connector/splice. Take the distinction between the reading on the second side and also the first side. The difference needs to be roughly similar to the optical attenuation from the optical connector/splice. The measurement can be taken several times and averaged to boost accuracy. If the optical fiber identifier indicates high loss, the connector/slice could be defective.

Fiber optic splice closure will be the equipment employed to offer room for fusion splicing optical fibers. In addition, it provides protection for fused fiber joint point and fiber cables. There are mainly two types of closures: vertical type and horizontal type. Quite a number of fiber splice closures are designed for different applications, including aerial, duct fiber cables and direct burial. Generally speaking, they are usually used in outdoor environment, even underwater.

Fiber Optic Splice Closure Types . For outside plant splice closure, the two main major types: horizontal type and vertical type.

1) Horizontal type – Horizontal type splice closures appear to be flat or cylindrical case. They whzqqc space and protection for optical cable splicing and joint. They can be mounted aerial, buried, or perhaps for underground applications. Horizontal types are used more frequently than vertical type (dome type) closures.

Most horizontal fiber closure can accommodate countless SZ Stranding Line. They are designed to be waterproof and dirt proof. They could be found in temperature ranging from -40°C to 85°C and will accommodate approximately 106 kpa pressure. The cases are generally manufactured from high tensile construction plastic.

2) Vertical Type – Vertical form of fiber optic splice closures seems like a dome, thus also, they are called dome types. They fulfill the same specification because the horizontal types. They are equipped for buried applications.

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