Far-infrared high-resolution Fourier transform spectrometer

Carli, B.; Carlotti, M.; Mencaraglia, F.; Rossi, E.

doi:10.1364/ao.26.003818

Cited by 25 publications

(4 citation statements)

References 4 publications

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“…In thefirst case about k330MHz can be explored thanks to the 120 MHz tunability of the waveguide CO2 laser and to the use of 90 MHz opto-acoustic modulators which are used to isolate the output beams of the CO2 beams from the MIM diode. In the second case the tunability comes from the microwave source (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) used to add the tunable sidebands to the CO, difference frequency.…”

Section: Coherent Atomic and Molecular Spectroscopjr In The Farmentioning

confidence: 99%

“…As a consequence a total 10 GHz wide scan, corresponding to the Phyuca Scripta 37 Fig. 15. Comparison between the 3rd order Tunable far Infrared spectrometer (a) and the best available [8] FTS recording (b). By means of the new coherent technique the regions A--t B-and A + + B+ (each of them 5 GHz wide) can now be investigated with aresolution of about 50 KHz.…”

Section: Spectroscopical Applicationsmentioning

confidence: 99%

“…The corresponding scan Fig. 15(a) taken with a high resolution Fourier Transform Spectrometer [8] shows a jumble of unresolved lines.…”

Section: Spectroscopical Applicationsmentioning

confidence: 99%

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Coherent atomic and molecular spectroscopy in the far infrared

Inguscio¹

1988

Phys. Scr.

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Recent advances in far infrared spectroscopy of atoms (fine structure transitions) and molecules (rotational transitions) are reviewed. Results obtained by means of Laser Magnetic Resonance, using fixed frequency lasers, and Tunable Far Infrared spectrometers are illustrated. The importance of far infrared spectroscopy for several fields, including astrophysics, atmospheric physics, atomic structure and metrology, is discussed.

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Section: Coherent Atomic and Molecular Spectroscopjr In The Farmentioning

confidence: 99%

Section: Spectroscopical Applicationsmentioning

confidence: 99%

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Coherent atomic and molecular spectroscopy in the far infrared

Inguscio¹

1988

Phys. Scr.

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“…As the number of optical path folds increases, the requirements for the collimation of the beam become higher. These problems Factors will affect the interference intensity [13][14][15] . At the same time, only a few methods are suitable for spectral imaging.…”

Section: Introductionmentioning

confidence: 99%

Joint interference imaging spectral super-resolution technology based on FPI modulation

Zhang,

Liu,

Wang

et al. 2024

Sixth Conference on Frontiers in Optical Imaging and Technology: Novel Imaging Systems

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The spectral resolution of interference spectral imaging technology is difficult to improve by directly increasing the maximum OPD due to limitations such as luminous flux and system stability. Studies have shown that the Fabry-Perot interferometer (FPI) can be added as a spectral resampling element to an interference hyperspectral imager to achieve spectral super-resolution, but it is more demanding on the parameters of the FPI optical element in terms of system accuracy and stability. This paper proposes a new interferometric hyperspectral imager and FPI joint interference spectrum super-resolution method. This method uses dual interferometers to perform FPI periodic modulation of the target spectral information. Then, the high-frequency interference information displacement generated after modulation is analyzed and restored to improve the spectral resolution. Experimental results show that this method can obtain spectral super-resolution information through multi-component joint interference imaging, increasing the spectral resolution to three times, and theoretically achieving higher spectral super-resolution. The optical system of this system is compact in structure, has relatively little impact on luminous flux, system complexity and stability, and has low requirements on parameters such as FPI spacing and reflectivity. This article provides a new solution for interferometric imaging hyperspectral super-resolution technology to break through the maximum OPD limit.

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High‐Resolution Fourier Transform Spectrometry of Gases

Guelachvili¹,

Picqué²

2001

Handbook of Vibrational Spectroscopy

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This article mainly focuses on the experimental aspects of high‐resolution Fourier transform spectroscopy (FTS) as applied to molecular gas studies. The main characteristics and peculiarities of Doppler‐limited vibrational spectroscopy of gases and some of the current trends in the technique are discussed using select examples. An introduction to the general appearance of high‐resolution absorption and emission Fourier transform (FT) spectra is given. The specific advantages of the two most common FT recording procedures: the fast‐scanning and the stepping‐mode approaches are discussed. Some of the important scientific results that may be obtained in high‐resolution vibrational spectrometry using FTS are reviewed. Finally, recent developments on selective modulations and time‐resolved FTS are presented. About 300 references (titles included) provide a comprehensive overview of the various aspects of the ongoing applications.

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Far-infrared high-resolution Fourier transform spectrometer

Cited by 25 publications

References 4 publications

Coherent atomic and molecular spectroscopy in the far infrared

Coherent atomic and molecular spectroscopy in the far infrared

Joint interference imaging spectral super-resolution technology based on FPI modulation

High‐Resolution Fourier Transform Spectrometry of Gases

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