Design and Optimization of S-band Fiber Amplifier (1450-1530nm)

Abstract

In the current era of rapid development of information technology, people need larger capacity and faster ways to improve communication transmission efficiency. In order to seek more efficient transmission rates, people began to study the optical transmission of signals. Thulium doped fiber amplifiers are an important research topic in the field of communication. Presently, L-band and C-band TM-doped optical amplifier have been developed into commercial applications. The S-band approaches the common C band. So it is very important to study S band Ti-doped Fibre Amplifier in order to enlarge the bandwidth and increase the communication capability. By utilizing 1400 nm single-wavelength pumping technique, the gain for the wideband S-band (1450-1530 nm) in thulium-doped fluor tellurite glass fiber has been optimized. Genetic algorithms have been employed to analyze and optimize the parameters of fiber length and doping concentration for thulium-doped fluoride tellurite glass fiber. It is shown that the maximal gain can be obtained when the dopant concentration is high enough. Therefore, thulium-doped fluoride tellurite glass fiber is a promising and potential gain medium that can be used for constructing efficient wideband S-band fiber amplifiers.