光抽运二氟甲烷激光与微波振荡源高次谐波的混频实验

Harmonic Mixing Experiments Between Optically Pumped CH_2F_2 Laser Radiations and Microwaves

本文报导了4mm微波振荡源的高次谐波与CH_2F_2远红外激光之间的差频信号的观测。在三次实验中,采用的耿氏振荡器频率分别为93.16、73.54和73.9GHz,相应的谐波次数分别为15、19和22。前两次实验中的CH_2F_2激光频率值为1.397THz(波长214μm),后一次的频率值为1.626THz(波长184μm)。三次实验中差频信号的信噪比均优于20dB。

The beat signals between higher order harmonics of a 4mm microwave source and a CH2F2 FIR laser are reported.In three experiments,frequencies of the Gunn oscillator are 93.16,73.54 and 73.9 GHz while corresponding harmonic orders are 15th,19th and 22nd respectively laser frequencies are 1.397(former two)and 1.626 THz(last one)respectively.The beat frequency signal-to-noise ratios are better than 20 dB.