Abstract: The gas absorption spectroscopic measurement device according to one embodiment of the present invention is provided with: a laser irradiation unit (1); and optical resonator (2), and a first detection unit (3) for detecting light taken out of the optical resonator (2). The gas absorption spectroscopic measurement device acquires the component concentration of a gas to be measured by CRDS (Cavity Ring-Down Spectroscopy) measurement.

Abstract: According to an aspect of the present invention, a gas measurement apparatus includes a measurement controller (6), a spectrum generator (72), a processing unit (73), and a result obtaining unit (74). The measurement controller (6) controls the apparatus so that a laser-light source (1) causes laser light to be incident to an optical resonator (4) and a wavelength of the laser light is scanned within a predetermined wavelength range, the range including an absorption peak of a target component, thereby performing a CRDS measurement. The spectrum generator (72) generates an absorption spectrum based on data obtained at each wavelength within a predetermined wavelength range. The processing unit (73) approximates a waveform shape of the absorption peak of the target component in the absorption spectrum with a polynomial and acquires a coefficient of a term of a predetermined degree in the polynomial.

Abstract: A column 2 is provided in a gas capturing unit 20 for capturing sample gas. A gas supply unit 1 supplies carrier gas for sending sample gas into the column 2. A gas separation mechanism 100 guides carrier gas in the column 2 to the outside of the column 2 by setting the lead-out path 5 to negative pressure with respect to the inside of the column 2. A heating unit 23 heats the column 2 to desorb sample gas captured by the gas capturing unit 20. Sample gas desorbed from the gas capturing unit 20 is introduced into a cell 31. A light source unit 32 irradiates sample gas in the cell 31 with light. An analysis unit 3 analyzes sample gas based on an intensity change of light emitted by the light source unit 32.

Abstract: The gas absorption spectroscopic measurement device according to one embodiment of the present invention is provided with: a laser irradiation unit (1); and optical resonator (2), and a first detection unit (3) for detecting light taken out of the optical resonator (2). The gas absorption spectroscopic measurement device acquires the component concentration of a gas to be measured by CRDS (Cavity Ring-Down Spectroscopy) measurement.

Abstract: A gas absorption spectrometer is provided that is capable of measuring a gas concentration and the like with high accuracy even when a measurement target gas is mixed with a gas other than the measurement target gas.

Abstract: After a measurement-target gas has been introduced into a measurement cell (40) to a predetermined pressure, a measurement by CRDS at a predetermined wavenumber is performed using a laser source unit (1), optical switch (3), optical resonator (4) and photodetector (5). A portion of the measurement-target gas is subsequently discharged from the measurement cell (40) to lower the pressure, and a measurement at the wavenumber of an absorption peak of the target component 14CO2 is performed. Since the influence of the absorption by 14CO2 in the measurement at high pressure is negligible, the concentration of the background, including 12CO2, can be determined from a ring-down time determined in this measurement.

Abstract: According to an aspect of the present invention, a gas measurement apparatus includes a measurement controller (6), a spectrum generator (72), a processing unit (73), and a result obtaining unit (74). The measurement controller (6) controls the apparatus so that a laser-light source (1) causes laser light to be incident to an optical resonator (4) and a wavelength of the laser light is scanned within a predetermined wavelength range, the range including an absorption peak of a target component, thereby performing a CRDS measurement. The spectrum generator (72) generates an absorption spectrum based on data obtained at each wavelength within a predetermined wavelength range. The processing unit (73) approximates a waveform shape of the absorption peak of the target component in the absorption spectrum with a polynomial and acquires a coefficient of a term of a predetermined degree in the polynomial.

Abstract: A gas absorption spectrometer is provided that is capable of measuring a gas concentration and the like with high accuracy even when a measurement target gas is mixed with a gas other than the measurement target gas.