ASLD offers a user-friendly graphical interface for thermal and structural analysis, crucial for calculating thermal lens effects in laser crystals. Its 3-dimensional Finite-Element Method (FEM) accurately models long or thin laser crystals and small pump lights, considering frequency-dependent absorption and spectrum of pump light. With ASLD, designers can explore various crystal geometries and cooling methods, such as slab, oblique face, cylinder, and pyramid, streamlining the design process.

 ASLD calculates output power and beam quality based on beam radius, pump/resonator configuration, and optical elements like apertures and output couplers. It simulates population inversion in laser crystals, capturing the time dynamic behavior of the laser through rate equations for different Gaussian modes. This analysis enables designers to optimize performance while ensuring stability.