Abstract

A microcomputer-controlled Stark spectrometer suitable for sub-Doppler infrared–infrared double-resonance experiments is described. The spectrometer may be used with acousto-optically modulated conventional low-pressure CO₂ lasers or with the high-pressure waveguide versions, the latter providing a significant extension of the technique. A method of spectrum simulation has also been developed in which the effects of modulation on the second-derivative line shapes has been incorporated. Three examples of the use of these methods are given, the study of the effects of cell geometry on the line shapes and linewidths of double-resonance signals of fully deuterated formic acid (DCOOD), the analysis of the shapes of an asymmetric and an M-resolved spectrum that are observed using formaldoxime, and the identification of the pump transitions of optically pumped submillimeter laser lines in CH₃F, CD₃F, and CH₃OH.

© 1987 Optical Society of America

Infrared–infrared double-resonance spectra of the ν₅ and ν₆ bands of CHD₂F

G. Duxbury and J. McCombie
J. Opt. Soc. Am. B 4(7) 1197-1202 (1987)

Infrared–infrared double-resonance spectra of ¹³CH₃OH and ¹²CH₃OH

J. C. Petersen
J. Opt. Soc. Am. B 6(3) 350-355 (1989)

Stark spectroscopy using tunable far-infrared radiation

L. R. Zink, D. A. Jennings, K. M. Evenson, A. Sasso, and M. Inguscio
J. Opt. Soc. Am. B 4(7) 1173-1176 (1987)

Infrared–infrared double-resonance spectra of CH₃OD

J. C. Petersen and G. Duxbury
J. Opt. Soc. Am. B 7(10) 1997-2001 (1990)

Infrared–microwave double-resonance spectroscopy of CH₃OH by use of sidebands of CO₂ laser lines

Zhen-Dong Sun, Fusakazu Matsushima, Shozo Tsunekawa, and Kojiro Takagi
J. Opt. Soc. Am. B 16(9) 1447-1454 (1999)