Fig. 6: Measured mid-IR laser power properties.

a Measured maximum output laser power of eleven laser transitions with appropriate pressure. b Measured output laser power at different HBr gas pressures as a function of the absorbed pump power when pumped by the R(3) absorption line of the H81Br isotope; inset: the stability of laser output with time, measured at 5 mbar in near 1 h. c Measured and simulated maximum output laser power and residual pump power as a function of HBr pressure when pumped by the R(3) absorption line at an incident pump power of approximately 7.5 W. Solid lines with points are measured data and dashed lines with points are simulated results. d Measured and simulated output laser power when pumped by the R(3) absorption line at the optimum pressure of 5 mbar as a function of incident pump power and absorbed pump power. The points are measured data. The solid lines are linear fitting of measured data and the dashed lines are simulated results