At the other end of the fiber, the optical signal is demultiplexed, or separated, much like a prism separating different colors of light. This technology has been enhanced by the introduction of dense wavelength division multiplexing, or DWDM, which permits wavelengths to be more closely spaced, thereby allowing more wavelengths to be transmitted simultaneously. Prior to the development of fiber amplifiers, signal attenuation, or loss, limited the distance over which an optical signal could be transmitted without regeneration. As a result, electrical amplification equipment was installed in numerous locations throughout the network to provide regeneration of optical signals. Optical amplifiers now enable optical signals to travel very long distances without having to revert to the electrical domain.
Raman amplifiers are two key optical amplification techniques.
Oplink provides complete EDFA and Raman passive gain blocks and the complete suite of optical components necessary for optical amplifiers. Fused Fiber Optic Products Fused fiber optic devices have a wide range of uses in the optical networking industry. Fused fiber couplers combine two or more light signals into one, or split one light signal into two or more. Oplink designs, manufactures and markets a range of fused fiber optic networking components. All devices are tested according to industry standard test procedures and are supplied with all pertinent measurement data.