A far infrared laser sideband spectrometer in the frequency region 550-2700 GHz

P. Verhoeve; E. Zwart; M. Versluis; M. Drabbels; J.J. ter Meulen; W. Leo Meerts; A. Dymanus; D.B. McLay

doi:10.1063/1.1141123

A far infrared laser sideband spectrometer in the frequency region 550-2700 GHz

P. Verhoeve^*, E. Zwart, M. Versluis, M. Drabbels, J.J. ter Meulen, W. Leo Meerts, A. Dymanus, D.B. McLay

^*Corresponding author for this work

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Abstract

This paper describes a tunable far-infrared (FIR) spectrometer. Tunable radiation is obtained by frequency mixing, fixed frequency FIR laser radiation and tunable microwave radiation in Schottky barrier diodes. An optically pumped laser and an HCN discharge laser are used as FIR sources and klystrons in the frequency range of 22-114 GHz as microwave sources. This yields an 85% coverage of the frequency region between 550 and 2700 GHz. Up to sixth order sidebands have been generated and used for spectroscopy. The ultimate sensitivity corresponds to a minimum detectable fractional absorption of 10^- ⁵ at 1-s RC time. The applicability of the spectrometer in high-resolution spectroscopy of transient species has been demonstrated by the observation of spectra of OD and N₂H⁺. New laser emissions of optically pumped CH₂F₂ have been found and accurate frequencies have been determined for some of them.

Original language	English
Pages (from-to)	1612-1625
Number of pages	14
Journal	Review of scientific instruments
Volume	61
Issue number	6
DOIs	https://doi.org/10.1063/1.1141123
Publication status	Published - 1 Dec 1990
Externally published	Yes

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title = "A far infrared laser sideband spectrometer in the frequency region 550-2700 GHz",

abstract = "This paper describes a tunable far-infrared (FIR) spectrometer. Tunable radiation is obtained by frequency mixing, fixed frequency FIR laser radiation and tunable microwave radiation in Schottky barrier diodes. An optically pumped laser and an HCN discharge laser are used as FIR sources and klystrons in the frequency range of 22-114 GHz as microwave sources. This yields an 85% coverage of the frequency region between 550 and 2700 GHz. Up to sixth order sidebands have been generated and used for spectroscopy. The ultimate sensitivity corresponds to a minimum detectable fractional absorption of 10- 5 at 1-s RC time. The applicability of the spectrometer in high-resolution spectroscopy of transient species has been demonstrated by the observation of spectra of OD and N2H+. New laser emissions of optically pumped CH2F2 have been found and accurate frequencies have been determined for some of them.",

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year = "1990",

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doi = "10.1063/1.1141123",

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T1 - A far infrared laser sideband spectrometer in the frequency region 550-2700 GHz

AU - Verhoeve, P.

AU - Zwart, E.

AU - Versluis, M.

AU - Drabbels, M.

AU - ter Meulen, J.J.

AU - Meerts, W. Leo

AU - Dymanus, A.

AU - McLay, D.B.

PY - 1990/12/1

Y1 - 1990/12/1

N2 - This paper describes a tunable far-infrared (FIR) spectrometer. Tunable radiation is obtained by frequency mixing, fixed frequency FIR laser radiation and tunable microwave radiation in Schottky barrier diodes. An optically pumped laser and an HCN discharge laser are used as FIR sources and klystrons in the frequency range of 22-114 GHz as microwave sources. This yields an 85% coverage of the frequency region between 550 and 2700 GHz. Up to sixth order sidebands have been generated and used for spectroscopy. The ultimate sensitivity corresponds to a minimum detectable fractional absorption of 10- 5 at 1-s RC time. The applicability of the spectrometer in high-resolution spectroscopy of transient species has been demonstrated by the observation of spectra of OD and N2H+. New laser emissions of optically pumped CH2F2 have been found and accurate frequencies have been determined for some of them.

AB - This paper describes a tunable far-infrared (FIR) spectrometer. Tunable radiation is obtained by frequency mixing, fixed frequency FIR laser radiation and tunable microwave radiation in Schottky barrier diodes. An optically pumped laser and an HCN discharge laser are used as FIR sources and klystrons in the frequency range of 22-114 GHz as microwave sources. This yields an 85% coverage of the frequency region between 550 and 2700 GHz. Up to sixth order sidebands have been generated and used for spectroscopy. The ultimate sensitivity corresponds to a minimum detectable fractional absorption of 10- 5 at 1-s RC time. The applicability of the spectrometer in high-resolution spectroscopy of transient species has been demonstrated by the observation of spectra of OD and N2H+. New laser emissions of optically pumped CH2F2 have been found and accurate frequencies have been determined for some of them.

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ER -

A far infrared laser sideband spectrometer in the frequency region 550-2700 GHz

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