W. Chen et al., GAUSSIAN OPTICAL DESIGN OF A SUBMILLIMETER-WAVE AND FAR-INFRARED LASER SIDE-BAND HETERODYNE SPECTROMETER, International journal of infrared and millimeter waves, 18(1), 1997, pp. 217-232
A submillimeter-wave/far-infrared (SMM/FIR) laser sideband heterodyne
spectrometer has been built for molecular rotational spectroscopy appl
ication in the frequency range of 600-3000 GHz. Based an Gaussian opti
cs, optical system of the spectrometer is designed to be quasi-achroma
tic and low losses. In this article the optical design and the perform
ance of the spectrometer are presented.