An off-axis cavity-enhanced absorption spectrometer at 1605 nm for the 12CO2/13CO2 measurement

Kasyutich, Vasili L.; Martin, Philip A.; Holdsworth, Robert J.

doi:10.1007/s00340-006-2312-0

Cited by 36 publications

(15 citation statements)

References 35 publications

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“…The CW-CRDS instrument was a less costly and more compact alternative to the traditional technique of IRMS, while providing comparable sensitivity. In 2006, Kasyutich et al [233] presented their proof-of-concept study where they used an off-axis cavity-enhanced absorption spectroscopy (OA-CEAS). The distributed-feedback laser diode (DFB-LD) was operated near 1605 nm.…”

Section: Atmospheric Sensing Based On Cavity Ring-down Spectroscopymentioning

confidence: 99%

Laser Spectroscopy for Atmospheric and Environmental Sensing

Fiddler

Begashaw

Mickens

et al. 2009

Sensors

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Lasers and laser spectroscopic techniques have been extensively used in several applications since their advent, and the subject has been reviewed extensively in the last several decades. This review is focused on three areas of laser spectroscopic applications in atmospheric and environmental sensing; namely laser-induced fluorescence (LIF), cavity ring-down spectroscopy (CRDS), and photoluminescence (PL) techniques used in the detection of solids, liquids, aerosols, trace gases, and volatile organic compounds (VOCs).

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Section: Atmospheric Sensing Based On Cavity Ring-down Spectroscopymentioning

confidence: 99%

Laser Spectroscopy for Atmospheric and Environmental Sensing

Fiddler

Begashaw

Mickens

et al. 2009

Sensors

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“…By using an off-axis cavity-enhanced absorption spectrometer (OA-CEAS), V. L. Kasyutich et al [3] reached a precision of 1.8‰.…”

Section: Introductionmentioning

confidence: 99%

Precise¹³CO₂/¹²CO₂isotopic ratio measurements for breath diagnosis with a 2-μm diode laser

Sun

Ma²,

Cao³

et al. 2014

SPIE Proceedings

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A laser spectrometer based on a distributed-feedback semiconductor diode laser at 2 μm is developed to measure the changes of 13 CO 2 / 12 CO 2 isotope ratio in exhaled breath sample with the CO 2 concentration of ~4%. It is characterized by a simplified optical layout, in which a single detector and associated electronics are used to probe CO 2 spectrum. The cell has 10 cm long base length with 26.4 m optical path length in total and 330 cm 3 volume. The cell pressure and temperature are controlled at 50 Torr and 28℃, respectively. The best 13 δ precision of 0.06‰ was achieved by using wavelet denoising and Kalman filter.

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“…Off-axis paths through optical cavities were first described by Herriot et al [23]. The offaxis approach has been used successfully for sensitive absorption measurements in: high speed CRD detection [21], PS-Cavity enhanced absorption (CEA) [20,24,25], CRD spectroscopy [26,27], and CEA spectroscopy [28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Low temperature cavity ring down spectroscopy with off-axis alignment: application to the A- and γ-bands of O2 in the visible at 90 K

Perez-Delgado

Manzanares

2011

Appl. Phys. B

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The cavity ring down (CRD) technique presented here involves an optical cavity attached to a cryostat. The static cell and mirrors of the optical cavity are all inside a vacuum chamber at the same temperature of the cryostat. The temperature of the cell can be changed between 77 K and 298 K. An off-axis alignment of the laser beam into the cavity is used to increase the number of resonant modes inside the cavity and improve the signal to noise ratio of the absorption bands. To demonstrate the capabilities of the low temperature CRD cell, the absorption spectra of O 2 are recorded at 90 K for the A (υ = 0 ← υ = 0) and γ (υ = 2 ← υ = 0) bands of the b 1 + g ← X 3 − g transition using cavity ring down spectroscopy. The optical cavity performance was tested using two variations of the CRD technique. The A-band is measured using the phase-shift cavity ring down method and the γ -band using the pulsedlaser exponential-decay method. A comparison between experimental and simulated spectra of the O 2 bands at 90 K confirms the molecular temperature measured by a sensor localized in the cell. Quantitative measurements of the individual rotational line intensities are made for the oxygen γ -band to confirm the temperature of the cell and calculate the vibrational band intensity. The application of this technique for laboratory studies of planetary atmospheres and the spectroscopy of molecular complexes is emphasized.

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An off-axis cavity-enhanced absorption spectrometer at 1605 nm for the 12CO2/13CO2 measurement

Cited by 36 publications

References 35 publications

Laser Spectroscopy for Atmospheric and Environmental Sensing

Laser Spectroscopy for Atmospheric and Environmental Sensing

Precise¹³CO₂/¹²CO₂isotopic ratio measurements for breath diagnosis with a 2-μm diode laser

Low temperature cavity ring down spectroscopy with off-axis alignment: application to the A- and γ-bands of O2 in the visible at 90 K

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An off-axis cavity-enhanced absorption spectrometer at 1605 nm for the 12CO2/13CO2 measurement

Cited by 36 publications

References 35 publications

Laser Spectroscopy for Atmospheric and Environmental Sensing

Laser Spectroscopy for Atmospheric and Environmental Sensing

Precise13CO2/12CO2isotopic ratio measurements for breath diagnosis with a 2-μm diode laser

Low temperature cavity ring down spectroscopy with off-axis alignment: application to the A- and γ-bands of O2 in the visible at 90 K

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Precise¹³CO₂/¹²CO₂isotopic ratio measurements for breath diagnosis with a 2-μm diode laser