Temperature measurement using frequency comb absorption spectroscopy of CO2

Hänsel, Andreas; Reyes-Reyes, A.; Persijn, Stefan; Urbach, H. P.; Bhattacharya, Nandini

doi:10.1063/1.4984252

Cited by 12 publications

(5 citation statements)

References 41 publications

(42 reference statements)

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“…The lineshape is a function of the light frequency ν, the temperature T, and the pressure p. As can be seen, for a given detectable absorption strength, the concentration can be decreased if the path length is increased accordingly. It is also worth noting, that while there is a temperature dependence, the signal changes very slightly with temperature, and its impact on the absorption coefficient can be ignored in the current setting [20]. Increasing the pressure leads to an increased amount of absorbers in a given volume, and hence a stronger absorption; however, the increased pressure also results in stronger collision broadening, leading only to slight changes when comparing the maximum absorption level to the baseline.…”

Section: Hcfmentioning

confidence: 99%

Integrated Ammonia Sensor Using a Telecom Photonic Integrated Circuit and a Hollow Core Fiber

et al. 2020

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We present a fully integrated optical ammonia sensor, based on a photonic integrated circuit (PIC) with a tunable laser source and a hollow-core fiber (HCF) as gas interaction cell. The PIC also contains a photodetector that can be used to record the absorption signal with the same device. The sensor targets an ammonia absorption line at 1522.45 nm, which can be reached with indium phosphide-based telecom compatible PICs. A 1.65-m long HCF is connected on both ends to a single-mode fiber (SMF) with a mechanical splice that allows filling and purging of the fiber within a few minutes. We show the detection of a 5% ammonia gas concentration, as a proof of principle of our sensor and we show the potential to even detect much lower concentrations. This work paves the way towards a low-cost, integrated and portable gas sensor with potential applications in environmental gas sensing.

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Section: Hcfmentioning

confidence: 99%

Integrated Ammonia Sensor Using a Telecom Photonic Integrated Circuit and a Hollow Core Fiber

et al. 2020

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“…Alyabyshev et al considered using polar molecules to measure applied electric fields [9]. Laser and frequency comb spectroscopy have demonstrated as low as 7 mK precision in measuring the temperature of atmospheric CO 2 [10][11][12]. The fractional accuracy σ T /T of such measurements in the field is limited to a few 10 −4 , however, by uncertainties in abundance and atmospheric pressure.…”

Section: Moleculesmentioning

confidence: 99%

Quantum Blackbody Thermometry

Norrgard,

Eckel,

Holloway

et al. 2020

Preprint

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Blackbody radiation (BBR) sources are calculable radiation sources that are frequently used in radiometry, temperature dissemination, and remote sensing. Despite their ubiquity, blackbody sources and radiometers have a plethora of systematics. We envision a new, primary route to measuring blackbody radiation using ensembles of polarizable quantum systems, such as Rydberg atoms and diatomic molecules. Quantum measurements with these exquisite electric field sensors could enable active feedback, improved design, and, ultimately, lower radiometric and thermal uncertainties of blackbody standards. A portable, calibration-free Rydberg-atom physics package could also complement a variety of classical radiation detector and thermometers. The successful merger of quantum and blackbody-based measurements provides a new, fundamental paradigm for blackbody physics.

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“…This makes the mid-infrared region more advantageous when only trace species of interest are present [27][28][29]. On the other hand, while a number of demonstrations have been reported with mid-infrared TDLAS for temperature measurement, the adoption of broadband VIPA spectrometer with OFC is still found to be bounded to the near-infrared [30,31]. Therefore, we explore and here report for the first time the development of a mid-infrared VIPA-based OFC spectrometer for sensitive and robust temperature measurement.…”

Section: Introductionmentioning

confidence: 99%

“…However, uncertainties in the measured absorption area of each individual transition will increase if the spectrum becomes densely packed with overlapping transitions, such that extraction of temperature from a single line profile such as using Doppler broadening [33] is no longer applicable, especially if instrumental broadening is further involved. It is therefore difficult to employ the direct temperature fitting method from the broadband spectra of the VIPA system over a wide temperature range as in the aforementioned work [30,31].…”

Section: Introductionmentioning

confidence: 99%

Mid-infrared virtually imaged phased array spectrometer with optical frequency comb: fast thermometry over large dynamic range

Zhu,

Song,

Wang

et al. 2023

Meas. Sci. Technol.

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We demonstrate a broadband mid-infrared frequency comb spectrometer utilizing virtually imaged phased array (VIPA) with the potential of quantitative, fast thermometry over large dynamic range. A modified Boltzmann plot method for attaining quantitative spectral interpretation in the dispersive VIPA system is proposed and realized, despite the broadband spectral overlapping and spatially variant instrumental broadening. The developed method allows accurate interpretation of the comb spectra even without reaching single-comb-tooth resolution, and can be readily extended to other measurements with overlapped spectra. The method is validated with measurements of the ν3 band of methane, and a single-shot temperature accuracy of within 10 K is experimentally demonstrated over the range of 300 to 600 K at a rate of 200 Hz. The present method takes full benefit of the unique advantages of the high-resolution, broadband VIPA-based frequency comb spectroscopy and has the potential to offer fast and precise thermometry. As far as we know, this is the first study to use a mid-infrared virtually imaged phased array for temperature measurement with frequency comb spectroscopy.

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Temperature measurement using frequency comb absorption spectroscopy of CO2

Cited by 12 publications

References 41 publications

Integrated Ammonia Sensor Using a Telecom Photonic Integrated Circuit and a Hollow Core Fiber

Integrated Ammonia Sensor Using a Telecom Photonic Integrated Circuit and a Hollow Core Fiber

Quantum Blackbody Thermometry

Mid-infrared virtually imaged phased array spectrometer with optical frequency comb: fast thermometry over large dynamic range

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