Fast-Scanning Far-Infrared Fabry-Perot Interferometer

Abstract

A scanning Fabry-Perot interferometer for use in the far ir (100 microm < < 2 mm) has been developed capable of scanning a free spectral range in a few milliseconds. A commercial loudspeaker was used as a drive, and mirrors were fabricated from electroformed copper mesh. Primary limitations of the instrument were due to vibrations of the interferometer frame.

Electron cyclotron emission and absorption in fusion plasmas

“…(b) The Fabry-Perot interferometer [195,152] which can be used in a static mode or in a rapid (few milliseconds) scanning mode. In Fig.…”

A fast-scanning Fourier transform 2D IR interferometer

“…To exploit these advantages, we have devised a method that allows us to rapidly acquire 2D spectra in the time domain. Fast scanning techniques for time domain interferometric measurements have previously been implemented to great success [13][14][15]. Within the context of 2D IR spectroscopy, approaches for rapid time domain scanning have been demonstrated, but these techniques generally require either high precision delay stages [16] or infrared pulse shapers [17].…”