2013年9月26日星期四

The difference of multimode and single mode fiber


Single mode cable is a single stand (most applications use 2 fibers) of glass fiber with a diameter of 8.3 to 10 microns that has one mode of transmission. Single mode fiber with a relatively narrow diameter, through which only one mode will propagate typically 1310 or 1550nm. Carries higher bandwidth than multimode fiber, but requires a light source with a narrow spectral width.
Single-mode fiber gives us a higher transmission rate and up to 50 times more distance than multimode, but it also costs more. Single-mode fiber has a much smaller core than multimode. The small core and single light-wave virtually eliminate any distortion that could result from overlapping light pulses, providing the least signal attenuation and the highest transmission speeds of any fiber cable type.
Multi mode cable diameter is a little big, with a common diameters in the 50-to-100 micron range for the light carry component (in the United States, the most common size is 62.5um). In most applications, the use of multimode optical fiber, two fibers (WDM, usually without the use of multimode fiber). POF is a relatively new based on the plastic of the cable, the cable's commitment is similar to that of the performance on the glass cable very short run, but at a lower cost.
Which types fiber to install ? This is based on transmission distance to be covered as well as the overall budget allowed. If the distance is less than a couple of miles, multimode fiber will work well and transmission system fiber optic cable price (transmitter and receiver) will be in the $500 to $800 range. If the distance to be covered is more than 3-5 miles, single mode fiber is the choice. Transmission systems designed for use with this fiber will typically cost more than $1000 (due to the increased cost of the laser diode).
If you have single-mode fiber indtalled, but only go a short distance. you can not use multimode equipment for lower cost. Multimode equipment will not inject enough light into a single-mode fiber since the light carrying core of this fiber is only 9 microns in diameter compared to 62.5 microns in diameter for multimode fiber. Unfortunately you must use single-mode equipment. If the fiber distance is short however, the cost for replacing the single-mode fiber with multimode fiber may be more economical than the higher cost for the single-mode electronics.
The more information about fiber, fiber optic cable providers- Fiberstore can give you.

2013年9月18日星期三

Three types fiber optic cable based on Fiber types


Based upon fiber types in a cable, fiber optic cables can be categorized as three types.
Single Mode Fiber Optic Cable-All fibers in the cable are single mode fibers
Single mode fiber is a single stand (most applications use 2 fibers) of glass fiber with a diameter of 8.3 to 10 microns that has one mode of transmission. Single Mode Fiber with a relatively narrow diameter, through which only one mode will propagate typically 1310 or 1550nm. Carries higher bandwidth than multimode fiber, but requires a light source with a narrow spectral width.
Single Mode fiber is used in many applications where data is sent at multi-frequency (WDM Wave-Division-Multiplexing) so only one cable is needed - (single-mode on one single fiber)
Single-mode fiber gives you a higher transmission rate and up to 50 times more distance than multimode, but this fiber optic cable price is highter. Single-mode fiber has a much smaller core than multimode. The small core and single light-wave virtually eliminate any distortion that could result from overlapping light pulses, providing the least signal attenuation and the highest transmission speeds of any fiber cable type.
Multimode Fiber Optic Cable - All fibers in the cable are multimode fibers.
Multi mode Fiber has a little bit bigger diameter, with a common diameters in the 50-to-100 micron range for the light carry component (in the US the most common size is 62.5um). Most applications in which Multi-mode fiber is used, 2 fibers are used (WDM is not normally used on multi-mode fiber). POF is a newer plastic-based cable which promises performance similar to glass cable on very short runs, but at a lower cost.
Multimode fiber gives you high bandwidth at high speeds (10 to 100MBS - Gigabit to 275m to 2km) over medium distances. Light waves are dispersed into numerous paths, or modes, as they travel through the cable's core typically 850 or 1300nm. Typical multimode fiber core diameters are 50, 62.5, and 100 micrometers. However, in long cable runs (greater than 3000 feet [914.4 meters), multiple paths of light can cause signal distortion at the receiving end, resulting in an unclear and incomplete data transmission so designers now call for single mode fiber in new applications using Gigabit and beyond.
Hybrid/Composite Cable-Both single mode and multimode fibers are packaged in one cable
Both single mode and multimode fibers are packaged in one cable, such as 4 multimode fibers and 4 single mode fibers in a single cable. Hybrid fiber cable offers the same great benefits as our standard indoor/outdoor cables, with the convenience of installing multimode and singlemode fibers all in one pull. Our composite cables offer optical fiber along with solid 14 gauge wires suitable for a variety of uses including power, grounding and other electronic controls.
Hybrid fiber cable or composite fiber optic cable is designed for integrating voice, data, video and power. They are used in control, distribution and signaling systems applications. Perfect for surgical tools, sensing equipment and sensors, MRI suites, oncology suites and x-ray rooms. FiberStore can manufactur single-mode and multimode hybrid cables and composite cables with any length.

2013年9月17日星期二

what is Armored cable?


Definetion
Armored cable is an alternative to running conduit in difficult locations. Instead of running rigid metal pipe that has to be screwed together in twisting or tight locations, it is often easier just to thread flexible armored cable into place. Armored cable comes rolled in spools like regular cable, and is typically available with two, three, or four individually insulated conductors in a variety of sizes1.Armored Fiber Optic Cable is used by the military, industrial applications as in petrochemical, industrial plants including nuclear and utilities are installed by direct burial in areas where rodents are a problem. The armored construction provides additional crush and rodent protection, and this means the armored cable is conductive, so it must be grounded properly.
Types: There are three basic types of metal-covered cable; all are referred to as armored cable. BX is the oldest form. This cable type went into production during World War II and saw heavy use for several years. While this cable provided the protections common in armored cable, it had a tendency to leak, and its grounding system was poor.True armored cable is essentially just a heavier form of BX. It features a better grounding system and a heavier internal insulation. The process used to cover the cable in its metal covering allows for better waterproofing and an overall tougher design.The last style of armored cable is metal-clad (MC) cable. MC cable uses a different grounding system from true armor cable and may have additional waterproofing. This is the newest type of metal-covered cable and is found in a wide range of commercial and industrial buildings.
The advantages make the armored fiber optic cable price higher than others:
It comes preloaded with wires already in it so you don’t have to fish them through yourself.
It provides its own ground bonding.
It can be run in places ordinary conduit cannot.
It provides a great deal of protection from damage by screws or nails as compared to ordinary insulated cable.

2013年9月9日星期一

Fiber optic communications have become mainstream


Fiber optic communications have become mainstream, fiber optic cable sale also received the favor of businessman. Fiberstore, as the leading fiber fiber optic cable providers, have 10 years history on the field of fiber optic communications. The global, vertically-integrated business model and expertise in optical design enables FiberStore to rapidly deliver market-leading, high performance fiber optic components and subsystems. The R&D and engineering teams provide strong innovative capability , who have core technical knowledge ranging from optoelectronic device, optical subassembly, and module design, to product and manufacturing process development expertise. With over 200 employees primarily in Dong Guan and ShenZhen, we can serve the customers and distribution partners around the world fast. What's more, our custom service and wholesale service save customers' time and money, making customers enjoy personalization.
Fiber optic communications explains about the way communication takes place through optical fiber. Although its history is short the use of optical fiber has grown considerably when compared with its beginning. It is now seen as one of the most used factors where communication is concerned. Below you will find a more detailed description of what optical fiber is.
The question you might ask yourself is why you should change from your current source to optical fiber. Well, if you simply look at the growing need for communication, you will be able to make a more informed decision. The trend in communication has moved from information that is communicated to more information digitalized. All communication information cannot be possible without a carrier that will have to contain more bandwidth. As frequency determines the carrier’s bandwidth and light carries the highest frequency, it has therefore been found that fiber optics is the strongest way of carrying the needed light.
As it has been confirmed that light is the best carrier of information, the conducting of light will be an important factor in hosting all the information successfully. As fiber optics is a transparent and flexible filament, it has been shown to carry the light in the most effective way. Another important factor is that optical fiber will follow the internal reflection law in order to transmit the light and therefore the information.
Light waves need to be transmitted and received in the correct way and is made possible by the laser diode and photodiode that are the two key components to the fiber optics.
With all these carefully thought out innovations, fiber optics has now become the most successful tool in connecting people from all over the globe.


2013年9月5日星期四

PM Fiber cable? What's that?

Polarization Maintaining (PM) Fiber cable is made with a special fiber that maintains the polarization of light waves. It is used in instrumentation, measurement and in some applications where stability is required at speeds above 10Gbps Polarization Maintaining (PM) Cable Assemblies from Fiberstore give you the quality and precision you need. Polarization Maintaining fiber is used in applications requiring the light to maintain polarization as it propagates down the core of a fiber. PM fiber is commonly utilized in the telecommunications, sensor, and specialized photonics industries. With multiple packaging options, Fiberstore can provide you an exact solution for your PM fiber requirements. For more about Polarization Maintaining cable, please attention to fiber optic cable sale on Fiberstore