Enhanced by numerical simulation incorporating bismuth doping, design of a fiber laser operating within 1350nm–1400nm wavelength range

In recent years, as the existing and future fiber optic communication systems have increasingly higher demands for the amplification of transmission bandwidth, active fibers that can amplify the transmission bandwidth within the transmission band are becoming more and more popular. Since its first demonstration in 2005, there has been a significant increase in the use of bismuth-doped glass. Bi-doped optical fiber represents a highly promising active medium for near-infrared lasers and amplifiers. In this paper, this paper have studied the fluorescent characteristics of a large number of Bi-doped glasses and crystals in the 1000 ~ 2000 nm spectrum. Fiber lasers not only drive technological advancements and application expansion in related fields but also offer robust support for scientific research and industrial development. In this article, the plane design, the transition arrangement and the numerical model of the BPF are presented. This model is characterized by three levels, and it is explored that the effect of optical fibre and pump power on the gain band is studied by means of the solution of velocity and power equation. It is anticipated that when excited within the 800–900nm range, the laser will exhibit an exceptionally broad gain spectrum covering the low-loss window of entire optical fibers within the 1000–1600nm range.