Optimized TEM00output from a uniformly pumped four-level laser

The maximized continuous TEM
00
output power and optimum output mirror transmission are calculated for a four-level laser assuming spatially uniform pumping of the laser medium. The results are expressed in simple closed forms that depend on the TEM
00
mode radius, the radius of the gain medium, the absorbed pump power, the threshold absorbed pump power, and the optical loss of the laser resonator.