Fast-scanning spectroscopic method for the submillimeter: the FASSST spectrometer

Frank C. DeLucia; Sieghard Albert

doi:10.1117/12.331170

13 November 1998 Fast-scanning spectroscopic method for the submillimeter: the FASSST spectrometer

Frank C. DeLucia; Sieghard Albert;

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Proceedings Volume 3465, Millimeter and Submillimeter Waves IV; (1998) https://doi.org/10.1117/12.331170
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

A new FAst Scan Submillimeter Spectroscopic Technique (FASSST) is described. It uses voltage tunable Backward Wave Oscillators (BWOs) as primary sources of radiation. In contrast to the more traditional phase or frequency lock techniques, it uses fast scan (approximately 10⁵ Doppler limited resolution elements/sec) and optical calibration methods. Its attributes include (1) absolute frequency calibration to approximately 1/10 of a Doppler limited linewidth (less than 0.1 MHz), (2) high sensitivity, (3) the ability to measure many thousands of lines/sec, and (4) simplicity. This system is made possible by (1) the excellent short term spectral purity of the broadly (approximately 100 GHz) tunable BWOs, (2) a very low noise, rapidly scannable high voltage power supply, (3) fast data acquisition, and (4) software capable of automated calibration and spectral line measurement.

Citation Download Citation

Frank C. DeLucia, Sieghard Albert, "Fast-scanning spectroscopic method for the submillimeter: the FASSST spectrometer", Proc. SPIE 3465, Millimeter and Submillimeter Waves IV, (13 November 1998); doi: 10.1117/12.331170; https://doi.org/10.1117/12.331170

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