Tag Archives: optical fiber cables

Coaxial Cable And Fiber Optic Cable Which One Is Right For Your Particular Job

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Modern information network provides many possible way of passing information between computers, servers, network center, TV, radio and telephone. Two of the most popular way to make these connections coaxial cable and optical fiber cable. Both of these types of cable can be used for carrying video, audio, and other forms of data, and both can offer you distinct advantages and disadvantages in setting up the data network of your dreams.

Coaxial Cable

Coaxial cable has been widely used since about at the beginning of the twentieth century. This is a testimony to the resilience and cable quality, its universality has been able to unchallenged still more or less in their long life. Coaxial cable is the key to success is the shielding design, makes the copper core cable to transmit data fast, don’t succumb to interfere with or damage the environment factors.

All of the coaxial cable is composed of a copper core, and in turn surrounded by, and then a weaving dielectric insulation copper shield, finally a plastic sheath. These four layers allow coaxial cables to be deployed in almost any conveivable setting, and for most of the twentieth century, coax cables were the cable of choice of setting up almost every variety of communications network.

Originally, coax cable was used by the military to transmit radio and telephone signals.

Different types of coaxial cable are still differentiated today by the designation RG-a shortened version of the term Radio Guide, which was the military’s choice nomenclature for differentiating different types of cable.

As terrestrial and cable, coaxial cable into the more common everyday use. When the popularity of the internet, become China’s largest dielectric coaxial cable transmission of signals between computers all over the world.

Though coaxial cable has proven to be a resilient means of data transfer, it does have its drawbacks. Coax cables often fall victim to a phenomenon known as signal leakage, wherein imperfections in a cable’s shielding lead it to provide a weak signal that is subject to interference (this is how you wind up getting a fuzzy signal from your cable television connection).

Many different kinds of coaxial cable is available and that ir is important to find out which type is best for your data requirements, if the coaxial cable is you choose to use your network project.

Fiber Optic Cable

Whereas coaxial cable depend on the copper as medium to transmit data, the core components of the optical fiber cables simply select ultrafine glass known as silicon. Fiber optic cable is still a newly invented, only into widespread use in 1980s. Though usually more expensive than coaxial cable, optical fiber offers several advantages, will ignore any large-scale digital data network.

Instead of using electricity as a medium in which to pass information (as is the case with coaxial cables), fiber optic cable employ light to carry remarkably large amounts of data at a remarkably fast speed. Fiber optic cable will usually contains several silicon the spread of the “nuclear” increasing its capability of providing cable data transmission.

Optical fiber cable can be used in the single mode and multimode, single mode fiber cable provides a single transmission path and which data can be passed, and multimode cable provides several paths. Dual fiber optic cable can transmit data in both directions, and simplex fiber optic cable can transmit data only in one direction.

Because of their expense, relative novelty, and sophisticated design, fiber optic cables are found less frequently in residential and consumer settings than coaxial cables. Coax cables have earned a deserving reputation for being easy to install and more than able to take a beating. While fiber optic cables offer a higher quality of data transfer than coaxial cables, they are probably best employed for large-scale professional networks, such as those found within an academic or business campus. If home installation or medium-capacity data transfer is your goal, then you’d probably be better off sticking with coaxial cable.

The Industrial Purpose of Using Fiber Optic Cables

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There are several kinds of industrial applications through the use of fiber optical cable. Thin fiber of glass or plastic, through which data can light and sound propagation is called optical fiber. These optical fibers as thin as human hair. When they are assembled together, they form a cable that can be used for transmitting information and signals.

Optical fiber is widely used in telephone and telecom industry. Optical lighting is also an indispensable medical, aerospace and military applications. Other systems such as intrusion detection alerts or light through optical fiber movements. Thanks to their big data carrying capacity, the cable is particularly important in the local area network (LAN). Applications such as machine vision lighting are enabled via optical lightings.

A major advantage of these cables is proposed is their lower cost than the traditional use of copper wire. Here are some other offers important advantages of fiber optic cable:

Long-distance data transmission

High bandwidth can be reach even over long distances using this cable. They can carry critical signals without the loss of data. These cables also do not get jammed, making them ideal for mission critical operations such as sending flight signals.

Immune to electromagnetic interference

Since these cables use the medium of light, and not electricty, to transmit signals, electromagnetic interference doesn’t usually affect the data transmission process.

The ideal security data transmission

It is a known fact that electromagnetic interference (EMI) could also cause data leaks. This is a potential threat for sensitive data transfer operations. It may not always be possible to shield the wire, and even with the shielding, also cannot guarantee 100% safety. On the contrary, an optical cable has no external magnetic field so signal tapping is not easily achieved. This makes an optical cable is the most preferred components or sensitive data transmission security.

No spark hazard

Electrical wiring constantly needs to be safeguarded against a potential spark hazard. This isn’t the case with optical fiber cables as they are inherently safe. This particular attribute is especially significant in industries such as chemical processing or oil refineries where the risk of explosion is high. Signals that are sent using cables do not spark.

No heat issues

Fiber optics can carry small amounts of light without the risk of producing heat. Thus, fiber optic cables are safe to use in surgical probes that are inserted inside a patient’s body to study internal organs. These very cables are also used during surgeries to relay laser pulses. With no heat or shock hazard, such cables are safe to use during the most critical surgeries. This attribute makes optical cables safe for use in machine vision lighting applications too.

These are a few fundamental advantages of optical cables. There are several other benefits that a professional optical cable manufacturing house shall be able to discuss with you. More information about products such as LSZH cable, armored fiber cable for all you industrial applications.

Source: www.fs.com

How To Distinguish Between Good or Bad The Quality of Fiber Optic Cable

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1. Ointment. Ointment is mainly fine paste paste with cable, fiber paste normally should be full of the casing, cable paste should be under pressure every crevice of cable core. Now, fiber paste sufficient half-full or less the practice of cable extract some just wipe a layer of the cable core, while others are in the middle of the fiber optical cable two charge is not sufficient. This will make the fiber are not good protection, the impact of the transmission performance of optical fiber attenuation, poor water resistance less than the national standard, once the cable accidental seepage will cause the whole links seepage scrapped. Under normal circumstances, even accidental seepage simply repair a section of water seepage can, you do not need to start over. (National standard water-blocking performance: three meters of fiber optic cable, one meter of water column pressure round the clock impermeable.) If use poor ointment will also appear to be happening, and may because the ointment thixotropic, cause the fiber to cause microbending loss, the link transmission characteristics failed; ointment with acidic also with fiber optic cable metal materials analysis H reaction precipitation of hydrogen molecules, fiber case of H decay will increase dramatically, resulting in the entire link interrupt transmission.

2. Sheath. The cable sheath is necessary to adapt to many different complex climate, but also to ensure the stability of the long-term (at least 25 years). Cable jacket not only have a certain strength, low thermal deformation, wear, water permeability, heat-recoverable, and coefficient of friction, but also should be strong resistance to environmental performance materials processing features. Less or bad sheath material cracking, water seepage through factory acceptance, but the quality is defective use for some time, using recycled plastics to replace quality polyethylene sheath material is more serious. High quality sheath material made of fibe optic cable, a cable skin smooth, bright, uniform thickness, no bubbles, otherwise the coarse skin of fiber optic cable, and a lot of very small pit, and because of the thin thickness, the entire outer diameter of the fiber optic cable will be muach smaller than the high quality cable. Indoor fiber optic cable, usually made of high quality flame retardant PVC, the appearance should be smooth, bright, good flexibility, easy to peel; and otherwise poor skin finish, easy and tight buffer fiber, aramid adhesion phenomenon.

3. Steel, aluminum. Steel, aluminum cable is mainly used to protect the fiber from mechanical side pressure, moisture and other effects, better cable typically use chrome-plated steel strip. Low quality fiber optic cable to only one side done ordinary iron rust treatment, or black (uncoated steel), instead of chrome-plated steel strip, over time, the cable will appear corroded, fiber optic hydrogen loss also aggravate andits easy separation do not constitute the sheath bonded sheath tide also very poor performance; of some places tinned strip instead of chrome-plated steel strip, tin-plated surface of the strip, the bubble is inevitable, so in humid, prone to corrosion under the conditions of the atmosphere and surface condensation or water, especially under acidic conditions, corrosion faster. The tin plating layer is poor in heat resistance, melting at 232 degrees Celsius, only the application of due to squeeze sheaths when the high temperature, such that the peel strength uncertainty affect the cable anti-surge performance. Chromium melting point of 1900 degrees Celsius, chemically very stable at room temperature in air or water will not rust, corrosion resistance, very good resistance to environmental performance, easily oxidized due to surface passivation layer is formed so good. Aluminum generally failed thermal paste method coated aluminum instead of cast qualified coated aluminum, which also affect cable performance.

4. Steel wire. The steel wire in the fiber optic cable mainly used to protect optical fiber from the mechanical tension. Good cable typically use for phosphating steel wire, high modulus short-term tension 1500N and 3000N. And low-quality fiber optic cable will be a very small diameter wire or ordinary steel instead of the one hand, easy to rust; On the other hand, is far less than the tensile strength 1500N construction may strain the fiber. High modulus phosphide stell wire is generally gray color, good toughness, not easy to bend; the alternative wire generally pinch in your hand can be bent a long time, the two rust fracture hanging cable box.

5. Loose tube. The installed fiber loose tube fiber optic cable is generally used polymer PBT material (poly (butylene terephthalate)), this loose tube, high strength, no deformation, anti-aging. Poor quality loose tube fiber optic cable is sometimes replaced with other materials, diameter thin, hand pinch flat, no different from drinking straw, can not afford the protective effect of the fiber.

6. Waterproof tape. Fiber optic cable with waterproof tape or water blocking yarn through the inside of the product showed a uniform distribution of high water-absorbing resin has strong water absorption, under the combined effect of the osmotic pressure, affinity, rubber elastic, super absorbent resin inhalation several times the weight of water. Further, the water-blocking powder once with water swollen gel will instantly, regardless to its much pressure is applied, moisture nor is extruded. Thus, with a water-absorbent resin containing water-blocking tape coated cable core, in case the outer wall of the fiber optic cable is damaged, the wound portion of the high water-absorbent resin to play due to expansion of the sealing effect, can prevent the entry of water to a minimum. Low-quality fiber optic cable commonly used non-woven fabric or paper tape, once the cable jacket is damaged, the consequences will be very serious.

7. Kevlar. Kevlar is a high-strength chemical fiber, most in the field of military-industrial complex, a bullet-proof vest is the producer of this material. It is a patented product of DuPont, is the major cost components of the indoor fiber optic cable, tight buffer fiber indoor cable is mainly used to protect against mechanical tension. Due to Kevlar high cost, poor quality of indoor fiber optic cable outer diameter is generally made ​​very thin, so you can by reducing the few shares aramid cost savings, or use an appearance similar to Kevlar polyester yarn instead (more common) polyester yarn almost can not bear what tension. So that the optical fiber laying easily strain or pull off.

8. Optical fiber. The fiber optic cable core raw materials, the good cable commonly used manufacturers of high quality core. Low-quality fiber optic cable is usually lower fiber and unsolicited fiber, these fibers due to the complex sources, quality is difficult to guarantee, sometimes multimode fiber often mixed with single-mode fiber, and the general lack of small factories necessary testing equipment, not fiberquality of judgment, more so the quality is difficult to be guaranteed. In addition, some bought with cheap short segment later cabled fiber splicing. The naked eye can not distinguish this fiber, the problems often encountered in the construction are: low transmission rate, short distance, fiber attenuation, not and pigtail docking, lack of flexibility, easily broken plate filament when even a single fiber a multi-mode, the other end is single-mode.

9. Coloring ink. Distinguish fiber in order to facilitate the construction of national standards be with bright color and high-quality fiber optic cable are standard in high-quality ink colored fiber loose tube, the color is very clear and easy to fall off, while the low-quality fiber optic cable is used poor qualityink coloring or simply coloring and inferior ink colors are vivid and sometimes easy to dissolve in the fiber paste the color can not be distinguished, not colored even more great inconvenience to the construction.

10. Product packaging. The fiber optic cable commonly used packaging wooden plate or the iron wooden tray into the shaft, the outside of the plate sealed wooden seal plate to ensure that the bulky fiber optic cable throughout the transit force, bending radius conditions within the scope of the standard requirements. Low-quality fiber optic cable in order to save costs, generally very poor packaging tray, transported to the destination is almost close to falling apart, and some simply do not have the disk, look around cable is shipped, or the disc do not have to seal the wood.

In summary, optical fiber cables real good or bad from the structural design, integrated the difference between the pros and cons of the timber material and production process. Because the cable is not yet a large number of popular, low-quality products, while a lot of hidden dangers, many users even integrators do not understand the line is still used regardless of settings.

It is for this reason that the negative impact of low-quality fiber optic cable industry will be even greater, because the fiber optic cable itself, its value is not significant, but the cost of laying process (direct burial, aerial, wearing a tube) were truly amazing.and time-consuming, coupled with its entire communication link based medium, so if there are problems, no matter how expensive your hardware devices at both ends of the high-end, the entire system will be, without exception, completely paralyzed, will be a very long period of repair, resulting in the loss of thousands of times the difference between the pros and cons.