Fiber Optics and Fibre optic Cable
Fiber optics or rather optical fibres are long, thin strands of glass about the diameter of a human hair.These are very pure glass strandswhich are arranged in optical cables or bundles. Fibre optics are used to transmit light signals over long distances at high speed.
CABLE SPLICING & FIBRE OPTIC CABLE - FIBRE OPTICS
The following parts can be identified when you take a closer look at a optical fibre strand.:
The Core is in the centre of the optical fibre you will find the core , which is the thin glass where the light travels. The cladding surrounds the core , the optical material which reflects the light back into the core . The buffer coating comes on the outside you will find a plastic coating that protects the fiber from damage and moisture.
When hundreds or thousands of these optical fibers are arranged in bundles in optical cables, it forms an optical cable or fibre optics cable.
Optical fibre cables normally come in Single-mode fibers or Multi-mode fibers.
Single-mode fibers have small cores (about 3.5 x 10-4 inches or 9 microns in diameter) which transmit infrared laser light (wavelength = 1,300 to 1,550 nanometers). Multi-mode fibers have larger cores (about 2.5 x 10-3 inches or 62.5 microns in diameter) they transmit infrared light (wavelength = 850 to 1,300 nm) from light-emitting diodes (LEDs).
Optical fibers can be made from plastic with a large core (0.04 inches or 1 mm diameter) and they transmit visible red light (wavelength = 650 nm) from LEDs.
The light in a fiber-optic cable travels through the core (hallway) by constantly bouncing from the cladding , a principle called total internal reflection. Because the cladding does not absorb any light from the core, the light wave can travel great distances.
When you shine a flashlight beam down a long channel.You point the beam straight down the channel.light travels in straight lines which cause no problem when the channel is straight. When the channel is bent, the problem could be overcome by placing a mirror at the bend to reflect the light beam around the corner. This is what happens in an optical fiber cable.
Some of the light signal degrades and dissapears within the fiber due to impurities in the glass and other obsticles. The problem is more or less greater than 50 percent per km. However , high quality optical fibers show much less signal degradation , even as little as 10%.
Fibre optics is much faster than wireless in the order of gigabits per second. Fibre optics is excellent for multimedia where you are delivering videos on demand or doing videoconferencing or Voice over IP (VoIP) phone calls like Skype which consume megabits per second. Fibre optics is being compared in importance with microwave and satellite transmissions in the advanced world of communications. Fibre optics is the backbone of the telecommunications industry, the technology behind the internet revolution.
Fibre optics is still quite expensive as compared to the copper wire, though the prices are coming down rapidly. Fibre optics is the technique that uses optical fibres transparent rods of glass or plastic that are stretched to be long, thin and flexible to transmit data in the form of pulses of light. Fibre optics is an ideal data transmission media and ensures safe transmissions over long distances in environments with a high level of electrical interference.
Bizfibre in South Africa is a leading Fibre Optics company whith the expertise to advise and install any size project.
SPLICING , FIBRE OPTIC SPLICING, FIBRE OPTIC NETWORK, FIBRE OPTICS GAUTENG
Lizelle Botha – Director Projects
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