Development of a Step-Scan Fourier Transform Spectrometer With sub 1/2 HeNe Wavelength Step Size

Montana State University, Bozeman MT

Investigators

Abstract

With support from the Major Research Instrumentation (MRI) Program, Lee H. Spangler and colleagues in the Department of Chemistry and Biochemistry at Montana State University will develop a new method of mirror control in a step-scan FT spectrometer that will still utilize a helium-neon laser as the reference wavelength, but will allow step sizes much smaller than half the HeNe wavelength. Because the free spectral range is inversely proportional to the step size, this development will double to triple the free spectral range and permit the FT spectrometer to cover the entire useful optical range (ultraviolet to far infrared) in the step scan mode. The ability to span the HeNe frequency in step scan mode is potentially beneficial to anyone using this instrumentation for time resolved spectroscopy. The approach to be undertaken by these investigators is compatible with existing instrumentation and shows promise of commercial viability. The principal investigators have a strong partnership with industry, which should facilitate this commercialization.