Hi Experts,

I have some question about fiber optic cable such as:
what is difference between 8 cores single mode and 8 cores Multi mode fiber optic cable?

Thanks.

 

Hello;

I suggest you look at this site, it has very cleAr explanations to start with, and access to much more:
http://www.fols.org/technology/

Hope this helps,
Daniel Chartier

 

Single mode cables only have a single path that the light can take - used for greater distances and tend to be more expensive. Multimode have a larger cross sectional core than the wavelength of the light - used for general applications like fiber network cards for your desktop/servers. The 8 refers to how many fibers you get in a the single cable - like a bundle.

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Nathan Boeger
http://www.inductiveautomation.com
"Design Simplicity Cures Engineered Complexity"

 

In fiber-optic communication, a single-mode optical fiber is an optical fiber in which only the lowest order bound mode can propagate at the wavelength of interest. Single mode fibers are best at retaining the fidelity of each light pulse over longer distances and exhibit no dispersion caused by multiple spatial modes; thus more information can be transmitted per unit time giving single mode fibers a higher bandwidth in comparison with multi-mode fibers. A typical single mode optical fiber has a core radius of 5 to 10 µm and a cladding radius of 120 µm. Currently, data rates of up to 10 gigabits per second are possible at distances of over 60 km with commercially available transceivers.

Multi-mode optical fiber (multimode fiber or MM fiber) is a type of optical fiber mostly used for communication over shorter distances, e.g. within a building. It can carry 1 Gbit/s for typical building distances; the actual maximum data rate (given the right electronics) depends upon the distance. Multi-mode fiber has a higher light-gathering capacity than single-mode optical fiber, making splicing less difficult, but its limit on speed × distance is lower. Because multi-mode fiber has a larger numerical aperture than single-mode fiber, it supports more than one propagation mode, resulting in larger modal dispersion and consequently higher pulse spreading rates, limiting information transmission capacity.

Multimode fibers are useful for carrying larger amounts of power than single mode fibers. In such fibers, mode-filling becomes important, and mode scrambling attempts to fill the fiber to capacity, achieving an equilibrium mode distribution that utilizes all available fiber modes and has a more uniform energy density. These fibers are used when an intense beam is needed, as in optical pumping, laser welding, cutting, and marking.

 

check out below which also explains the single mode or multimode fiber

http://www.masstron.com/fiberoptic.html

 

Hello,
According to PickyGuide, the single-mode cables are ideal for transmitting high bandwidths as long as narrow, spectral width light sources are present. They are up to 50 times faster than multimode fiber optic cables, and are usually more expensive. Multimode cables are ideal for transmitting signals at high speeds and in high bandwidths over medium distances.

http://www.pickyguide.com/computers_and_software/fiber_optic_cables_guide.html