Resonantly enhanced 26 GHz parametric upconversion of CO2laser in NH3

Resonantly enhanced three-wave mixing of the 10.784 μm
R
(18) line of the C
¹³
O
2
¹⁶
laser and microwave radiation at 26.378 GHz in Stark tunable N
¹⁴
H
3
has resulted in upconverted parametric output at 10.774 μm. The energy levels of N
¹⁴
H
3
involved in the interaction and the apparatus used in the experiment are described. Experimental results showing saturation of the parametric signal with increasing N
¹⁴
H
3
pressure, input microwave power, and input laser power are described.