Discharge-driven electric oxygen-iodine laser superlinear enhancement via increasing g₀L

The authors report the development of an electric oxygen-iodine laser with higher output using a larger product of gain and gain length, g₀L. A factor of 4.4 increase in laser power output on the 1315 nm atomic iodine transition was achieved with a factor of 3 increase in gain length. I( ²P_1/2) is pumped using energy transferred from O ₂(a1Δ) produced by flowing a gas mixture of O₂-He-NO through three coaxial geometry radio-frequency discharges. Continuous wave (CW) average total laser power of 481 W was extracted with g₀L = 0.042.