Basically exactly what the Sheathing line solve may be the traditional distance problem as with any great distance telecommunication system such as a trans-Atlantic link. As optical signals travel from the fiber, the signals become weaker in power. The farther you are going, the weaker the signal become until it will become too weak to get detected reliably.
Fiber optic communication systems solve this problem through the use of fiber amplifiers on the way. A repeater or amplifier is inserted into the system at a point where the signal is now weak, to enhance the potency of the signal so it may be transmitted through another time period of fiber cable. Many amplifiers or repeaters can be put in sequence to maintain the signal strong along the whole fiber link.
Traditionally, electronic repeaters were used for optical signal amplification. A repeater is undoubtedly an opto-electro-opto device. It converts a weak optical signal into electronic signal, cleans up the electronic signal, after which converts the electronic signal to optical signal having a lightwave transmitter. The lightwave transmitter emits stronger power in comparison to the incoming optical signal and so amplifies it.
However, it becomes an inconvenient and expensive process and which explains why this has been replaced by the new optical fiber amplifiers technology.
An optical fiber amplifier is really a purely optical device. It doesn’t convert the incoming optical signal to electronic signal by any means. Basically, it is possible to consider it a in-line laser. And Optical fiber coloring machine can simultaneously amplify a large number of optical channels because they tend not to convert each channel into electronic signals separately.
The atoms of erbium or praseodymium might be pumped by high power light (pump laser) into excited state. However are not stable within the excited state. When the optical signals that have to be amplified pass even though fiber, they stimulate the excited erbium atoms. The erbium atoms will jump from the high power level excited state into low power level stable state, and release their energy such as emitted light photons concurrently. The emitted photons have the same phase and wavelength as the input optical signal, thus amplify the optical signal.
This can be a very convenient type of amplifier on an optical fiber communication system since it is an in-line amplifier, thus removes the requirement to carry out the optical-electrical and electrical-optical conversion process.
The pump laser wavelengths and the corresponding optical signal wavelengths are key parameters for operation of fiber amplifiers. These wavelengths rely on the kind of 12dextpky element doped within the Optical fiber coloring machine and on the composition of your glass inside the fiber.
Another important term in understanding fiber amplifiers is its “gain”. Gain measures the amplification per unit time period of fiber. Gain depends on the materials and also the operating conditions, and it also varies with wavelength for many materials.
For low input powers, the output power is proportional towards the gains times the fiber length. Thus, P(output) = P(input) x Gain x Length
For high input powers, the gain saturation effect is important. So increment of input power produces less output power, which essentially means the amplifier has exhaust your the energy it must have to generate more output.