A high-power 140 GHz ammonia laser

-Power levels of 17 kW in 0.7 μs pulses have been obtained from the 2.14 mm transition of NH 3 when optically pumped by a 65 J CO 2 TEA laser. Photon conversion efficiencies of 11 percent have been achieved. This is the first high-power laser line observed to work in the 140 GHz atmospheric window.