Metal ion doped silver halide crystals and fibers II: Feasibility of producing fiber amplifiers and lasers - Theoretical modeling

Theoretical modeling of strongly pumped doped silver halide fiber amplifiers is presented. This is an analytic part of an effort to introduce new lasing materials, composed of doped silver halides, in the near or mid IR region. The analysis is based on a rate equation formalism, for which experimental measurements of various optical properties of doped silver halide and crystals were applied as input parameters. The model includes solutions for both three- and four-level systems, such as Er³⁺ and Nd³⁺. Optimal range of fiber dimensions, doping materials and concentrations, and other optical properties are suggested in order to achieve significant amplification.