A FAR INFRARED-LASER SIDEBAND SPECTROMETER IN THE FREQUENCY REGION 550-2700 GHZ

被引：48

作者：

VERHOEVE, P ^{[1
]}

ZWART, E ^{[1
]}

VERSLUIS, M ^{[1
]}

DRABBELS, M ^{[1
]}

TERMEULEN, JJ ^{[1
]}

MEERTS, WL ^{[1
]}

DYMANUS, A ^{[1
]}

MCLAY, DB ^{[1
]}

机构：

[1] QUEENS UNIV,KINGSTON K7L 3Y7,ONTARIO,CANADA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1990年 / 61卷 / 06期

关键词：

D O I：

10.1063/1.1141123

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

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.

引用

页码：1612 / 1625

页数：14

共 47 条

[1] COUPLING LOSSES IN HOLLOW WAVEGUIDE LASER RESONATORS [J].