What is an optical amplifier?

Optical amplifiers are technologies used to amplify light signals, also called optical signals. The optical amplifier amplifies directly the optical signal without converting it into any other medium form. This distinguishes it from another type of device called a regenerator or repeater that increases the incoming optical signal by converting into electricity and then generating a new optical signal. The optical amplifier technology increases optical signals in devices such as lasers and optical cables, and is important for applications such as telecommunications. Each optical amplifier contains this method contains a physical medium that can amplify incoming light called a profitable medium. When the media receives incoming optical energy for profit, the process known as the pump profit medium, the incoming photons of the light temporarily absorb the excites some of the electrons of the media to the higher energy level. These electrons then drop quickly back to the original level. When they do it, the energy they lose is releasedAnd in the form of photons and amplifies the original signal. If there is a very high reinforcement need, more amplifiers can be tied together so that the optical signal can go through each of them.

Many different substances can be used as GIEL media in an optical amplifier, depending on optical performance, wavelength and other properties required for specific devices. The most common profit for optical amplifiers is silica doped with a small amount of rare soil elements such as coat of arms and yytterbium. Other reinforcement media, such as semiconductors or crystals of yytrium aluminum grenade, can also be used.

The type of amplifier called Raman amplifier increases optical signals by using Phenomenon called Raman's distraction. When the incoming light comes into contact with the matter, photons that are not absorbed are dispersed in different directions. The vast majority of them retain the same wavelength and frequencyEven as before. A very small percentage of them that has exchanged energy with particles for the vibrational energy of these particles, no.

Use this for optical amplification includes two light sources, a high -frequency pump laser and a lower frequency light source with a higher wavelength from the optical fiber that actually carries the signal. The profit medium in Raman's amplifier is drawn by high -frequency light from the pump laser, the exciting media particles and increasing their vibrating energy to stimulate Raman's scattering. When photons with a higher wavelength of the optical signal pass through the medium, the signal gains energy at the expense of the pump beam and is amplified. This method is mainly used in telecommunications of ions to increase long -distance signals sent via optical cables.