Basically exactly what the Optical fiber coloring machine solve may be the traditional distance problem as in any long-distance telecommunication system for instance a trans-Atlantic link. As optical signals travel throughout the fiber, the signals become weaker in power. The farther you go, the weaker the signal become until it might be too weak to become detected reliably.
Fiber optic communication systems solve this issue by utilizing fiber amplifiers along the way. A repeater or amplifier is inserted into the system at the point the location where the signal is becoming weak, to improve the potency of the signal so it could be transmitted through another duration of fiber cable. Many amplifiers or repeaters may be put in sequence to help keep the signal strong across 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 in the electronic signal, and then converts the electronic signal straight back to optical signal using a lightwave transmitter. The lightwave transmitter emits much stronger power compared to the incoming optical signal and consequently amplifies it.
However, it is really an inconvenient and dear process and which explains why this has been replaced from the new optical fiber amplifiers technology.
An optical fiber amplifier is actually a purely optical device. It doesn’t convert the incoming optical signal to electronic signal in any way. Basically, you may think of it a in-line laser. And secondary coating line can simultaneously amplify many optical channels simply because they do not convert each channel into electronic signals separately.
The atoms of erbium or praseodymium may be pumped by high power light (pump laser) into excited state. However are not stable inside the excited state. Once the optical signals that should be amplified pass though the fiber, they stimulate the excited erbium atoms. The erbium atoms will jump through the high power level excited state into low power level stable state, and release their energy by means of emitted light photons concurrently. The emitted photons have similar phase and wavelength because the input optical signal, thus amplify the optical signal.
This can be a very convenient type of amplifier to have an optical fiber communication system since it is an in-line amplifier, thus removes the desire to carry out the optical-electrical and electrical-optical conversion process.
The pump laser wavelengths and also the corresponding optical signal wavelengths are key parameters for operation of fiber amplifiers. These wavelengths be determined by the particular 12dextpky element doped in the Secondary coating line and also on the composition of your glass inside the fiber.
Another essential term in understanding fiber amplifiers is its “gain”. Gain measures the amplification per unit period of fiber. Gain is dependent upon the materials as well as the operating conditions, plus it varies with wavelength for those materials.
For low input powers, the output power is proportional to the gains times the fiber length. Thus, P(output) = P(input) x Gain x Length
For high input powers, the gain saturation effect comes into play. So increment of input power produces less output power, which essentially means the amplifier has exhaust the power it requires to generate more output.