Design and Optimization of Cr⁴⁺:Y₃Al₅O₁₂ Double-Clad Crystal Fiber Laser

Abstract

We report the design of a room-temperature (RT), continuous-wave (cw) Cr 4þ :Y 3 Al 5 O 12 (Cr 4þ :YAG) double-clad crystal fiber (DCF) laser grown by a codrawing laser-heated pedestal growth technique using a steady-state lumped model with a Lagrange multiplier optimization method. We demonstrate that the proposed optimization algorithm can provide an efficient and direct approach to analyzing both fiber structure and bulk medium in terms of practical application requirements. The simulation results reveal that Cr 4þ :YAG DCF lasers offer advantages over bulk lasers in terms of low-threshold lasing and high efficiency, which are essential for their use in optical communication systems. #