Abstract

For the first time, the resolution of a spectrometer capable of recording very wide spectral ranges is better than 10⁻³ cm⁻¹. This performance, obtained by multipassing an existing Fourier interferometer, is initially intended to get Doppler-limited spectra around 20 μm. The halfwidth of the actual unapodized apparatus function can now be meaningfully expressed in frequency units and is found to be 27 MHz. With such an apparatus it becomes possible to record, from adequate sources, sub-Doppler spectra within wide spectral ranges in the visible and the near ir where the resolution can be easily of the order of 20 times less than the width of the Doppler profiles. The tilt-compensated multipass system which may be used to increase by 3 the resolution of already built Fourier interferometers is described together with the first results obtained on our instrument.

© 1977 Optical Society of America

High-accuracy Doppler-limited 10⁶ samples Fourier transform spectroscopy

Guy Guelachvili
Appl. Opt. 17(9) 1322-1326 (1978)

High resolution Michelson interferometer for airborne infrared astronomical observations. 1: Concept and performance

J. P. Baluteau, M. Anderegg, A. F. M. Moorwood, N. Coron, J. E. Beckman, E. Bussoletti, and H. H. Hippelein
Appl. Opt. 16(7) 1834-1840 (1977)

Near infrared astronomical light collector

Jean-Pierre Chevillard, Pierre Connes, Maximilien Cuisenier, Jean Friteau, and Claude Marlot
Appl. Opt. 16(7) 1817-1833 (1977)

High resolution Michelson interferometer for airborne infrared astronomical observations. 2: System design

A. Langlet, C. Delage, D. Stefanovitch, B. Talureau, J. Tualy, J. Verveer, W. P. Fischer, J. M. Gilles, R. Scheper, J. Leblanc, and G. Dambier
Appl. Opt. 16(7) 1841-1848 (1977)

High resolution Fourier transform spectrometer (0.005 cm⁻¹) for the 0.6–100-μm spectral range

A. A. Balashov, V. S. Bukreev, N. G. Kultepin, I. N. Nesteruk, E. B. Perminov, V. A. Vagin, and G. N. Zhizhin
Appl. Opt. 17(11) 1716-1722 (1978)