MMF Raman WDM Manufacturers

In the mid-1980s, Beklemyshev, Allrn and other scientists combined laser technology and cleaning technology for practical work needs and conducted related research. Since then, the technical concept of laser cleaning (Laser Cleanning) was born. It is well known that the relationship between pollutants and substrates The binding force is divided into covalent bond, double dipole, capillary action and van der Waals force. If this force can be overcome or destroyed, the effect of decontamination will be achieved.

The fiber cut-off wavelength is to ensure that only one mode exists in the fiber. One of the main transmission characteristics of single-mode fiber is the cut-off wavelength, which is of great significance for fiber optic cable manufacturers and users of fiber optic cables to design and use fiber optic transmission systems.

Raman fiber amplifier (RFA) is an important part of dense wavelength division multiplexing (DWDM) communication system. In many nonlinear optical media, the scattering of pump light with a shorter wavelength causes a small part of the incident power to be transferred to another beam whose frequency is shifted down. The amount of frequency shift down is determined by the vibration mode of the medium. This process is called pulling Mann effect. If a weak signal and a strong pump light wave are simultaneously transmitted in the fiber, and the weak signal wavelength is placed within the Raman gain bandwidth of the pump light, the weak signal light can be amplified. This mechanism is based on stimulated Raman scattering The optical amplifier is called RFA.