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2013 年 9 月 28 日 星期六  |
| Buy High Quality Optical Cables From FiberStore |
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Fiber optic lines, which can be as thin as a piece of human hair, are used to transmit light signals and carry these signals over long distances, are widely used in networks.
There are many different types of fiber optic cables. All of the cables are defined by the number of fibers in the cable, the type of fibers (MM or SM), the size of the fiber (50, 62.5 or 125um) and the type of material used to enclose the fibers. The material used to enclose the fibers have many names. Some of the names are generic and others are names used by the cable manufacturer.
Regardless of which type of cable is used, information is transmitted in the same manner. Because the inside of fiber optic cable is coated with a reflective service, total internal reflection is present within the fiber optic cable. In order to transmit information through the interior of the fiber optic cables, analog information must first be converted into digital signals. Once this information is converted, lasers are able to transmit the digital signals in the form of pulses of light.
Because there is total internal reflection within the fiber optic cables, the information that is being transmitted in the form of light is able to continuously bounce off the reflective surfaces of the fiber optic cable. This is important, because even when the fiber optic cable is laid through an area that requires it to bend or twist, the total internal reflection allows the light to continue traveling through the cable to its final destination.
After you figure out these things, you may start to consider where to buy fiber optic cable with high quality and reasonable price?
Buying optical fiber cables for any engineering project is something that requires cautious approach. One cannot settle on poor quality cables in order to avoid expenses which eventually can lead to fire accidents resulting in even more expenditure.
Well, over the Internet, there are more chances of fiber optic cable manufacturers and suppliers. Accordingly, buyers increase their chances of buying high quality cables when they make purchase online. Also, since the competition is quite tough, the entrepreneurs sell the cables at amazingly competitive prices and what best platform can be there to find such prices if not the online medium?
Apart from quality and less prices, buying cables from FiberStore provides you with a range of options to choose from. Over the Internet, you can find fiber optics in a number of variants such as bare optical fiber, tight buffer fiber, large core fiber, simplex fiber cable, duplex fiber, OM3 OM4 fiber optic cable, waterproof cables, indoor outdoor fiber optic cable, ribbon fiber, loose tube cable, lszh cable, armored cables, FTTH fiber, figure 8 fiber optic cable, plastic fiber, pof cable, adss cable, hybrid fiber cable, etc.
Indeed, buying cables online is sensible. However, buyers can ensure that the FiberStore cables must be purchased from famous brands such as Corning - one of the leading industrial cable manufacturers in American.
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2013 年 9 月 26 日 星期四  |
| Get The Most Common Bare Fiber Optic Cables |
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In modern life, bulk fiber optic cable can carry a signal quite a distance -- perhaps 60 miles (100km). On a long distance line, there is an equipment hut every 40 to 60 miles. And bulk fiber optic cables are widely used in today's networking system.
A real fiber optic cable is made out of glass. The glass is incredibly pure so that, even though it is several miles long, light can still make it through. The glass is drawn into a very thin strand, with a thickness comparable to that of a human hair. The glass strand is then coated in two layers of plastic.
Fiber optic cable types can be single mode or multimode. Modes describe the distribution of light energy across the fiber. Light rays can travel through the wire as long as they hit the core-cladding interface at an angle less than that of the critical angle. Multifiber cable is a fiber optic cable with several optical fibers. While single-mode cable is only one fiber with a small core that only allows one mode of light to propagate. Common bulk fiber optic cable types include simplex, duplex, bare fiber,
Simplex Cable - Simplex cables are fiber optic cables with a single optical fiber. Simplex cable varieties include 1.6mm & 3mm jacket sizes.They are used in applications that only require one-way data transfer. Simplex is available in single mode and multimode.
Duplex Cable - Duplex cables are fiber optic cables with two optical fibers in a single cable structure. Light is not coupled between the two fibers, typically one fiber is used to transmit signals in one direction and the other receives. They are usually set up side-by-side and can be used for applications that require simultaneous, bi-directional data transfer. Duplex fiber is available in single mode and multimode.
Bare fiber - Bare fiber refers to a fiber optic core and cladding only. The bare fiber is primarily used for connecting equipment on one end to a light source on the other. Bare fiber can be terminated, polished, or prepared for pig-tailing.
The structure of a 250um coated bare fiber cable:
Core (9um for standard single mode fibers, 50um or 62.5um for multimode fibers),
Cladding (125um),
Coating (soft plastic, 250um is the most popular, sometimes 400um is also used).
Bare unjacketed fibre cable is perfect for effect lighting and can be integrated into any ceiling, wall, bar front and other design applications. Bare fiber cable should only be used in applications where the fiber can be installed without the danger of scratching or damaging the fiber cable and where future protaction is not required.
Jacketed solid core fiber cable is integrally sheathed with PVC to provide mechanical protection. They are suitable for direct embedment in mortar, soil or sand beds as long as care is taken to avoid crushing, scratching, cutting or kinking of the cable.
FiberStore, as a leading provider of optical fiber cables for over 8 years, supplies bare fiber cables from Corning company. The corning optical cable is OFNR-rated, UV-resistant, fully waterblocked indoor/outdoor cables. These cables with water blocking technology eliminates the need for traditional flooding compound, providing more efficient and craft-friendly cable preparation. Available in 62.5µm, 50µm, Single mode, Multimode and hybrid versions. |
2013 年 9 月 23 日 星期一  |
| Comparision Between Three Common Cables |
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1. Three Most Common Types Of Cables Used In Local Area Network
Coaxial Cable
Coaxial cable comes in two versions: Thinnet and Thicknet. Thinnet looks like regular TV cable. It is about 1/4 inch in diameter and is very flexible and easy to work with. In contrast, Thicknet is about 1/2 inch in diameter and not very flexible. Thicknet is older and not very common anymore except as a backbone within and between buildings. Coax transmits at 10 Mbps.
Twisted Pair Cable
Twisted pair cable looks like telephone wire and consists of insulated strands of copper wire twisted together. There are two versions of twisted pair cable: Shielded Twisted Pair (STP) and Unshielded Twisted Pair (UTP). STP is commonly used in Token Ring networks and UTP in Ethernet networks where it is referred to as "10Base-T", transmission rates vary between 10-100 Mbps.
Fiber Optic Cable
The bulk fiber optic cable consists of a thin cylinder of glass surrounded by glass cladding, encased in protective outer sheath. Fiber optic cable transmits data signals in the form of light, can transmit over long distances (over 2 km) but is expensive.
2. The pros and cons of the basic cable types
Coaxial Cable
PRO--Flexible and easy to install, relatively good resistance to electronic interference, electronic support components are relatively inexpensive.
CON--Short cable length, more expensive than UTP, unsecure, hard to change configuration, thinnet generally not good for use between buildings.
UTP Cable
PRO--Most flexible, cheapest cable (but requires expensive support components), easy to install, easy to add users, may be able to use existing phone cable if data grade.
CON--Shortest usable cable length, susceptible to electrical interference, unsecure, generally not good for use between buildings.
Fiber Optic Cable
PRO--Fastest transmission rate, not susceptible to electrical interference, secure, light weight, low ttenuation, high bandwidth, good for use between buildings.
CON--relatively expensive, relatively difficult to work with.
3. What Factors Should I Consider When Choosing Cable?
Cost - What is the budget and how much can be spent on cabling?
Reliability - How dependent are your organization's operations on the network?
Speed - How many concurrent users are there be and how critical is response time?
Security - How important is it to protect data from possible interception?
Growth - What are the organization's plans for growth?
Administration - How will the network be administered?
Electrical Interference - What is the physical environment in which the network will operate?
Existing Cable - Are there conduits or cabling already in place that might be useable.
Currently, people more often use extensively by bulk fiber optic cable to provide fast connections to the Internet. Being light weight and less likely to get trapped, bulk fiber optic cables make it more preferable to cable installation companies. Fibre optic cable is often used in backbone networks because of its wide bandwidth and cost effectiveness. Aslo bulk fiber optic cables have various types, such as tight buffered fiber, loose tube cable, large core fiber, simplex cable, duplex cable, ribbon cable, distribution cable, breakout cable, waterproof cables, elc. There is also corning optical cable available, which is manufactured by Corning company. |
2013 年 9 月 21 日 星期六  |
| Facts Of Fiber Optic Cables |
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People have really enjoyed the power and the flexibility of fiber optic cabling all around the world. Fiber optic cabling is becoming the fastest, smartest and most flexible way to enable large amounts of digital data to be transmitted and received. These long thin strands of cable have revolutionized the way our phone, television and information systems work. Without these cables, we wouldn't have high speed broadband internet. Fiber optic cables are inexpensive, flexible and do not take much power to run. These advantages have made them a popular favorite among many communication companies. The only problem is, many people still know little about fiber optic cabling technology.
Here are some fiber optic cabling facts:
Fiber optic cables have a history - The technology surrounding fiber optics has been around since the 1870's. The first introduction of actual fiber optic cabling started showing up in the 1950's. This is a technology rooted in solid history.
Fiber optic cables use light - There is no electrical current being passed through fiber optic cabling, only light. Because of this, there is no heat and no heat means no burning and no fire hazards. During normal use, fiber optics are the safest option for data transmission.
Fiber optic cables are fast - Data can be transmitted through fiber optic cabling faster than traditional cabling due to increased capacity. Right now, commercial uses of fiber optic cabling can transmit 10-80 Gigabits per second over just one channel. According to reports, the current record is 15.5 Terabits per second over a distance of 7,000km. To put that into perspective, that's the equivalent of 10.3 million DSL connections.
Fiber optic cables have many uses - From the traditional use of data transmission, fiber optics have grown in their use. Now, they are used with gun sights, imaging optics, spectroscopy, supply low levels of power, signs, art and even artificial Christmas trees.
Fiber optic cables have various types - Two main types of cables are multi-mode optical fibers and single-mode optical fibers. A multi-mode optical fiber has a larger core (≥ 50 micrometers), allowing less precise, cheaper transmitters and receivers to connect to it as well as cheaper connectors. There is also large core optical fiber(common 100 micrometers or even 400 micrometers). There are also Simplex cable and Duplex cable.
Simplex Cable- There is a single strand of fiber which is surrounded by a Single strand of fiber surrounded by a 900 um buffer after that a layer of Kevlar and lastly the outer jacket. It is generally available in 2mm or 3mm in plenum or riser jacket. Plenum is stronger while riser cable is more flexible.
Duplex Cable- The concurrent operation of a circuit in both directions within data communications is known as full duplex. The system is called half duplex when it is capable of sending only one transmission at a time. Two single strands are attached at the center surrounded by a 900 um buffer, and then comes a Kevlar jacket and finally the outer jacket.
Other types of fiber optic cables are loose tube cable and tight buffered cable, distribution cable, ribbon cable, breakout cable, waterproof cables for moisture environment, etc. |
2013 年 9 月 18 日 星期三  |
| Benefits From Waterproof Cables |
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Abrasion, vibration and impact damage, extreme temperatures, moisture ingress, chemical vapours and even fire retardancy will deeply damage your wiring cables. To solve this problem, fiber optic cable manufacturers have developed lots of special cables and cable assemblies for these applications. Such as waterproof cables designed for moisture environment, lszh(low smoke zero halogen or low smoke halogen free) cable provides protection from fire, which is not that easy to catch fire, etc.
Many of these cables have been designed and formulated to withstand the long term effects of being immersed in aqueous fluids of different kinds. They have been constructed using special insulation and jacket extrusions, and a variety of tapes, fillers and other compounds help prevent water from penetrating the cables. These materials are designed to absorb and swell so in the event that a cable is accidentally damaged, the point of entry will swell thus blocking and therefore preventing any water penetration.
In environments where additional protection is needed from moisture ingress, thorough water-proofing of an assembly can be achieved with the use of IP rated parts. Aside from preventing moisture ingress, waterproofed assemblies offer protection from abrasion, impact and heat damage and are ideal for application where units are exposed to extreme weather or high humidity either inside or outside. Waterproof cables are easily defined as any type of cable which can withstand being immersed in water. They can be seen in aquariums such as marine and tropical fish tanks where they are used to power the heaters and pumps and other various pieces of important equipment which is used in the running and maintenance of the aquarium. They have a wide variety of applications and may be used in saltwater, freshwater, solvents or even chemicals.
Waterproof cables are also used to power remotely operated underwater vehicles, which is a tethered underwater robot. These underwater robots are tethered or linked to a ship by a group of cables that carry electrical power, video and data signals to and from the ship. Many of these remote vehicles will also use hydraulic as well as electrical cabling.
Waterproof cables are used in communication, and a submarine communications cable is a cable which is laid beneath the sea to carry telecommunications between countries. They are very widely used in many different applications and even cables that run underground have to be waterproofed in some way. Waterproof cables are used in many different industries for various different applications.
Each installer wants to protect the cable as best as possible. There are a huge variety in the types of cables to choose from. Whether that might be a plastic, armored fiber optic cable or corning optical cable(cables from Corning), there are plenty of benefits in purchasing waterproof cables. |
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