Optimization of CO₂-based Hollow-Core Fiber Gas Laser for Watt-level Power Output at 4.3 μm wavelength

This dataset contains numerical simulation and experimental measurement data for a continuous-wave CO₂-filled hollow-core fiber gas laser operating at 4.3 μm. The data are generated to support the analysis and validation of a multi-level rate-equation laser model under different operating conditions.The dataset includes output power characteristics as a function of coupled pump power for multiple CO₂ absorption lines, specifically the R30 and R34 transitions. Measurements and simulations are performed under various gas pressures to investigate pressure-dependent performance and absorption-line-dependent behavior. For each condition, both experimental results and corresponding numerical predictions are provided.The experimental data are obtained from a continuous-wave hollow-core fiber gas laser system pumped at 2 μm, where the absorbed pump power is determined from the difference between the pump power measured under vacuum conditions and the residual pump power measured after gas filling. The simulation data are calculated using a steady-state rate-equation model that incorporates fiber propagation loss, gas pressure effects, and collisional relaxation processes.This dataset is intended to facilitate model validation, performance comparison between different absorption lines, and further studies on the design and optimization of mid-infrared hollow-core fiber gas lasers.