Chirped-pulse terahertz spectroscopy for broadband trace gas sensing
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TLDR
This work reports the first demonstration of a broadband trace gas sensor based on chirp-pulse terahertz spectroscopy, which allows for a rapid broadband multi-component sensing with low parts in 10(9) (ppb) sensitivities and spectral frequency accuracy of <20 kHz in real-time.Abstract:
We report the first demonstration of a broadband trace gas sensor based on chirp-pulse terahertz spectroscopy. The advent of newly developed solid state sources and sensitive heterodyne detectors for the terahertz frequency range have made it possible to generate and detect precise arbitrary waveforms at THz frequencies with ultra-low phase noise. In order to maximize sensitivity, the sample gas is first polarized using sub-μs chirped THz pulses and the free inductive decays (FIDs) are then detected using a heterodyne receiver. This approach allows for a rapid broadband multi-component sensing with low parts in 109 (ppb) sensitivities and spectral frequency accuracy of <20 kHz in real-time. Such a system can be configured into a portable, easy to use, and relatively inexpensive sensing platform.read more
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Journal ArticleDOI
Terahertz quartz enhanced photo-acoustic sensor
Simone Borri,Pietro Patimisco,Angelo Sampaolo,H. E. Beere,David A. Ritchie,Miriam S. Vitiello,Gaetano Scamarcio,Vincenzo Spagnolo +7 more
TL;DR: In this article, a photo-acoustic sensor employing a singlemode quantum cascade laser emitting at 3.93 terahertz (THz) was used to achieve a sensitivity of 7 parts per million in 4s integration time, corresponding to a 1σ normalized noise-equivalent absorption of 2'×'10−10'cm−1W/Hz½.
Journal ArticleDOI
Perspective: The first ten years of broadband chirped pulse Fourier transform microwave spectroscopy.
G. Barratt Park,Robert W. Field +1 more
TL;DR: The broadband chirped pulse Fourier transform spectroscopy technique enables the collection of a ≥10 GHz bandwidth spectrum in a single shot of the spectrometer, which allows broadband, high-resolution microwave spectra to be acquired several orders of magnitude faster than what was previously possible.
Journal ArticleDOI
Frequency-agile, rapid scanning spectroscopy
Gar-Wing Truong,Gar-Wing Truong,Kevin O. Douglass,Stephen Maxwell,R. D. van Zee,David F. Plusquellic,Joseph T. Hodges,David A. Long +7 more
TL;DR: In this paper, a frequency-agile, rapid scanning spectroscopy technique was proposed for fast and sensitive trace gas measurements and chemical kinetic studies, which requires no mechanical motion and provides a scanning rate of 8 kHz per cavity mode at a sensitivity of ∼2 × 10-12 cm-1 Hz-1/2, with a scanning range that exceeds 70 GHz.
Journal ArticleDOI
An arbitrary waveform generator based chirped pulse Fourier transform spectrometer operating from 260 to 295 GHz
TL;DR: In this article, the performance of a chirped-pulse Fourier transform millimeter-wave spectrometer operating from 260 to 295 GHz is described, which uses a high-speed arbitrary waveform generator (AWG) to create an excitation pulse and the single-frequency local oscillator (LO) used for the final down conversion detection stage.
Journal ArticleDOI
Segmented chirped-pulse Fourier transform submillimeter spectroscopy for broadband gas analysis.
Justin L. Neill,Brent J. Harris,Amanda L. Steber,Kevin O. Douglass,David F. Plusquellic,Brooks H. Pate +5 more
TL;DR: A variation of chirped-pulse Fourier transform spectroscopy that significantly reduces the technical requirements on high-speed digital electronics and the data throughput, with no reduction in the broadband spectral coverage and no increase in the time required to reach a given sensitivity level.
References
More filters
Journal ArticleDOI
The HITRAN 2008 molecular spectroscopic database
Laurence S. Rothman,Iouli E. Gordon,Yurii L. Babikov,A. Barbe,D. Chris Benner,Peter F. Bernath,Manfred Birk,Luca Bizzocchi,Vincent Boudon,Linda R. Brown,Alain Campargue,Kelly Chance,Edward A. Cohen,L. H. Coudert,V. M. Devi,Brian J. Drouin,André Fayt,Jean-Marie Flaud,Robert R. Gamache,Jeremy J. Harrison,Jean-Michel Hartmann,Christian Hill,Joseph T. Hodges,D. Jacquemart,Antoine Jolly,Julien Lamouroux,R. J. Le Roy,Gang Li,David A. Long,O.M. Lyulin,C.J. Mackie,Steven T. Massie,Semen Mikhailenko,Holger S. P. Müller,Olga V. Naumenko,Andrei Nikitin,Johannes Orphal,V.I. Perevalov,Agnes Perrin,E. R. Polovtseva,Charlotte Richard,Mary Ann H. Smith,Evgeniya Starikova,Keeyoon Sung,S.A. Tashkun,Jonathan Tennyson,Geoff Toon,Vl.G. Tyuterev,G. Wagner +48 more
TL;DR: The new HITRAN is greatly extended in terms of accuracy, spectral coverage, additional absorption phenomena, added line-shape formalisms, and validity, and molecules, isotopologues, and perturbing gases have been added that address the issues of atmospheres beyond the Earth.
Journal ArticleDOI
The Cologne Database for Molecular Spectroscopy, CDMS: a useful tool for astronomers and spectroscopists
TL;DR: The Cologne Database for Molecular Spectroscopy (CDMS) as discussed by the authors contains a catalog of transition frequencies from the radio-frequency to the far-infrared region covering atomic and molecular species that (may) occur in the interstellar or circumstellar medium or in planetary atmospheres.
Journal ArticleDOI
Mid-infrared Fourier transform spectroscopy with a broadband frequency comb.
Florian Adler,Piotr Masłowski,Aleksandra Foltynowicz,Kevin C. Cossel,Travis C. Briles,Ingmar Hartl,Jun Ye +6 more
TL;DR: This work presents a first implementation of optical-frequency-comb-based rapid trace gas detection in the molecular fingerprint region in the mid-infrared and achieves part-per-billion detection limits in 30 seconds of integration time for several important molecules.
Journal ArticleDOI
Mid-Infrared Frequency Comb Fourier Transform Spectrometer
Florian Adler,Piotr Masłowski,Aleksandra Foltynowicz,Kevin C. Cossel,Travis C. Briles,Ingmar Hartl,Jun Ye +6 more
TL;DR: In this article, a frequency-comb Fourier transform spectrometer operating in the 2100-to-3700-cm-1 spectral region is presented for fast and simultaneous acquisition of broadband absorption spectra with up to 0.0056 cm-1 resolution.
Journal ArticleDOI
Measuring Picosecond Isomerization Kinetics via Broadband Microwave Spectroscopy
TL;DR: A broadband Fourier transform microwave spectrometer is developed that uses chirped-pulse excitation to measure a rotational spectrum in the 7- to 18.5-gigahertz range in a single shot and thereby reduces acquisition time sufficiently to couple molecular rotational spectroscopy with tunable laser excitation.