New CW far-infrared lasing in14NH3using Stark tuning

New CW far-infrared lasing lines have been obtained in
¹⁴
NH
3
using either CO
2
or N
2
O pump lasers. Except for two of them, all of the lines have been obtained using the Stark effect to tune the infrared laser line and the infrared ammonia transition into frequency coincidence. Electric fields up to 18 kV/cm have been used with pressures of 20 millitorr.