What is the Raman optical amplifier used for?

The Raman optical amplifier is an optical amplifier based on Raman gain, which is derived from the stimulated Raman scattering effect. The active medium of the Raman optical amplifier is usually an optical fiber, but it can also be a crystal, a waveguide structure in a photonic integrated circuit, a gas, or a liquid medium. The signal light that is in the same direction or opposite to the pump light is amplified, and its wavelength is usually tens of nanometers smaller than the pump light. Raman optical amplifier is an important part of dense wavelength division multiplexing communication system. Raman optical amplifier is the key technology and important device of dense wavelength division multiplexing communication system.

Here is the content list:
The importance of Raman optical amplifiers in life.

The working principle of the Raman optical amplifier

The role of Raman optical amplifier.

The importance of Raman optical amplifiers in life
With the rapid development of the global network, information society, the demand for transmission speed and capacity of optical fiber communication systems have become increasingly demanding, dense wavelength division multiplexing technology and its advantages can be more fully utilize the vast resources of the optical fiber, To be able to develop rapidly. Raman optical amplifiers have become one of the key technologies and important components of DWDM communication systems because of their excellent characteristics such as arbitrary operating wavelength, broadband gain, and distributed amplification. To ensure the quality of the WDM transmission system, WDM systems using fiber amplifiers should have enough bandwidth, low noise figure and high output power, low polarization dependent and is capable of controlling the amplifier gain flatness, and other related properties. Therefore, the role of Raman optical amplifier in our lives is getting bigger and bigger, and people’s understanding of it is constantly improving.

The working principle of the Raman optical amplifier
The Raman optical amplifier technology is to dope rare earth elements that can generate laser light into the core of the fiber, and amplify the passed optical signal through the direct current light excitation provided by the laser. The traditional optical fiber transmission system uses optical-electrical-optical regenerative repeaters. This kind of relay equipment affects the stability and reliability of the system. To remove the above conversion process and directly amplify and transmit the signal on the optical path, it is necessary to use An all-optical transmission repeater to replace this regenerative repeater.

The role of the Raman optical amplifier
To expand the capacity of communication lines while minimizing the cost, Raman optical amplifiers are one of the preferred options. When a wavelength division multiplexed optical signal is transmitted in an optical fiber, there is inevitably a certain loss and dispersion. Loss leads to a decrease in the energy of the optical signal, and dispersion causes the optical pulse to expand. Therefore, a repeater must be set every certain distance. To amplify and regenerate the signal to continue transmission. The conventional method to solve this problem is to use an optical/electrical/optical repeater. Its working principle is to first convert the received weak optical signal into an electrical signal through a PIN or APD, and then amplify, equalize, and determine the electrical signal. Regeneration and other technologies, to obtain a good performance electrical signal, and finally through the semiconductor laser (LD) to complete the electrical/optical conversion, and then send it to the lower section of the optical fiber. This kind of optical/electrical/optical conversion and the processing method can no longer meet the requirements of modern telecommunication transmission to a certain extent. Since wavelength division multiplexing uses multiple wavelengths to transmit on a single fiber core, to perform electrical regenerative relaying, each wavelength must be performed one by one. This complicates the electrical relay equipment, and the transmission distance is limited by attenuation, and the cost is Higher. The Raman optical amplifier can be used to amplify the fuze time of all wavelengths in the band, that is, the same amplifier is used to provide gain to multiple channels, and the gain is not affected by signal polarization. In a high-speed, multi-channel transmission system There will be no crosstalk in the high-speed transmission system, and no pulse distortion in the high-speed transmission system. Therefore, the Raman optical amplifier is a key component of the wavelength division multiplexing system. So far, almost all WDM systems, whether they are test systems or commercial systems, use Raman optical amplifiers.

At last
From the above content, it can be seen that the Raman optical amplifier plays a very large role in the communication industry and is an important device. If you need to purchase Raman optical amplifiers, please visit our company’s official website to contact us.

Post time: Dec-06-2021