The design and implementation of a sub-THz spectrometer for operations at temperatures down to 340 mK was demonstrated. A Martin-Puplett (MP) interferometer was coupled to a cryostat housing two independently controlled platforms cooled down with He-3 for operations under extreme conditions. A two-channel signal detection scheme was developed which was conveniently enabled by the optical layout of a MP interferometer. The results show that the two-channel detection minimized uncertainties in sub-THz measurements induced by relatively slow data acquisition.
|Original language||English (US)|
|Number of pages||8|
|Journal||Review of Scientific Instruments|
|State||Published - Nov 2003|
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