Atmospheric laser heterodyne detection

Delahaigue, A.; Courtois, D.; Thiébeaux, C.; Kalité, S.; Parvitte, B.

doi:10.1016/1350-4495(95)00091-7

Cited by 34 publications

(4 citation statements)

References 12 publications

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“…Since the 1970s, laser heterodyne radiometry has become a well established receiver technique [15][16][17][18][19] and has been used to measure atmospheric gases such as ozone (O 3 ) [20,21], water vapor (H 2 O) [22], methane (CH 4 ) [22], ammonia (NH 3 ) [23], and chlorine monoxide (ClO-an atmospheric free radical) [24], with efforts for additional species such as nitrous oxide (N 2 O) underway. We present a passive variation of the laser heterodyne radiometer that uses sunlight as the light source for absorption of CO 2 in the infrared.…”

Section: Background Of Laser Heterodyne Radiometrymentioning

confidence: 99%

Miniaturized laser heterodyne radiometer for measurements of CO2 in the atmospheric column

et al. 2013

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We have developed a low-cost, miniaturized laser heterodyne radiometer for highly sensitive measurements of carbon dioxide (CO 2) in the atmospheric column. In this passive design, sunlight that has undergone absorption by CO 2 in the atmosphere is collected and mixed with continuous wave laser light that is step-scanned across the absorption feature centered at 1,573.6 nm. The resulting radio frequency beat signal is collected as a function of laser wavelength, from which the total column mole fraction can be de-convolved. We are expanding this technique to include methane (CH 4) and carbon monoxide (CO), and with minor modifications, this technique can be expanded to include species such as water vapor (H 2 O) and nitrous oxide (N 2 O).

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Section: Background Of Laser Heterodyne Radiometrymentioning

confidence: 99%

Miniaturized laser heterodyne radiometer for measurements of CO2 in the atmospheric column

et al. 2013

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“…[24]- [31], in the here presented method of balanced heterodyne Brillouin spectroscopy the signal and the LO interfere on a 50:50 beam splitter (BS), then both outputs of the BS are detected with photodiodes and the difference signal of both diodes is measured. This is a very common technology in radio frequency detection and quantum optics [32]- [41] and we apply it to Brillouin spectroscopy. By scanning the frequency of the LO, we are able to investigate a large frequency range and study the Brillouin shift of very different materials varying from acetone over water to porcine lenses, gummy bear (Haribo), and glass (SF10 glass, Schott AG, Germany), which are presented in the following.…”

Section: Introductionmentioning

confidence: 99%

Balanced Heterodyne Brillouin Spectroscopy Towards Tissue Characterization

et al. 2022

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We present the first application of balanced heterodyne detection, established in quantum optics, to Brillouin spectroscopy in biological tissues. The balanced detection cancels out a large part of the influence of the laser noise. The center wavelength is 1064 nm and the frequency resolution is 30 MHz. The frequency resolution and the accessible frequency range are only limited by the measurement time and the laser tuning range (30 GHz), respectively. In this way, we were able to measure the Brillouin shift in acetone, water, gummy bears, glass, and even porcine eye lenses.

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“…The science payload, a laser heterodyne radiometer (LHR), leverages earlier work on a ground-based LHR that observes carbon dioxide (CO 2 ), and methane (CH 4 ) in the atmospheric column [2][3][4][5][6]. Laser heterodyne radiometry has been used to measure gases in the atmosphere since the early 1970s [7][8][9][10][11][12] but the lasers used in these earlier versions were large, expensive, and required high voltage-power supplies and pumped cooling systems.…”

Section: Introductionmentioning

confidence: 99%

MiniCarb: a passive, occultation-viewing, 6U CubeSat for observations of CO₂, CH₄, and H₂O

Wilson¹,

Riot²,

DiGregorio³

et al. 2021

Meas. Sci. Technol.

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We present the final design, environmental testing, and launch history of MiniCarb, a 6U CubeSat developed through a partnership between NASA Goddard Space Flight Center and Lawrence Livermore National Laboratory. MiniCarb’s science payload, developed at Goddard, was an occultation-viewing, passive laser heterodyne radiometer for observing methane, carbon dioxide, and water vapor in Earth’s atmosphere at ∼1.6 µm s−1. MiniCarb’s satellite, developed at Livermore, implemented their CubeSat Next Generation Bus plug-and-play architecture to produce a modular platform that could be tailored to a range of science payloads. Following the launch on 5 December 2019, MiniCarb traveled to the International Space Station and was set into orbit on 1 February 2020 via Northrop Grumman’s Cygnus capsule which deployed MiniCarb with tipoff rotation of about 20° s−1 (significantly higher than the typical rate of 3° s−1 from prior CubeSats), from which the attitude control system was unable to recover resulting in a loss of power. In spite of this early failure, MiniCarb had many successes including rigorous environmental testing, successful deployment of its solar panels, and a successful test of the radio and communication through the Iridium network. This prior work and enticing cost (approximately $2 M for the satellite and $250 K for the payload) makes MiniCarb an ideal candidate for a low-cost and rapid rebuild as a single orbiter or constellation to globally observe key greenhouse gases.

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Atmospheric laser heterodyne detection

Cited by 34 publications

References 12 publications

Miniaturized laser heterodyne radiometer for measurements of CO2 in the atmospheric column

Miniaturized laser heterodyne radiometer for measurements of CO2 in the atmospheric column

Balanced Heterodyne Brillouin Spectroscopy Towards Tissue Characterization

MiniCarb: a passive, occultation-viewing, 6U CubeSat for observations of CO₂, CH₄, and H₂O

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Atmospheric laser heterodyne detection

Cited by 34 publications

References 12 publications

Miniaturized laser heterodyne radiometer for measurements of CO2 in the atmospheric column

Miniaturized laser heterodyne radiometer for measurements of CO2 in the atmospheric column

Balanced Heterodyne Brillouin Spectroscopy Towards Tissue Characterization

MiniCarb: a passive, occultation-viewing, 6U CubeSat for observations of CO2, CH4, and H2O

Contact Info

Product

Resources

About

MiniCarb: a passive, occultation-viewing, 6U CubeSat for observations of CO₂, CH₄, and H₂O