Title:
LIGHT ABSORBANCE ANALYSIS DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/176115
Kind Code:
A1
Abstract:
Provided is an electronic cavity-ring-down light absorbance analysis device with which it is possible to perform analysis at very high sensitivity and high resolution. An electro/optical conversion element 22 is configured by including a variable-wavelength laser 18 that is a light source for outputting light having a fixed wavelength and a fixed output that are set in advance, and an optical modulator 20 that modulates the intensity of the light having a fixed wavelength and a fixed output from the variable-wavelength laser 18 in accordance with an electrical signal outputted from a light detector 26. Since it is possible to obtain a light pulse that is of a magnitude corresponding to the electrical signal and that does not experience any change in wavelength irrespective of changes in the electrical signal, an electronic cavity-ring-down light absorbance analysis device 10 that makes it possible to perform high-precision analyses at a single wavelength is obtained. This makes it possible to perform measurements at very high sensitivity and high resolution, such as detecting: changes in concentration, at the ppm- or ppb-order, of extremely small quantities of carbon dioxide gas, methane, dinitrogen monoxide, and other such greenhouse gases included in the atmosphere; and/or the concentration of hydrogen isotopes and oxygen isotopes included in water.
Inventors:
MAEDA YOSHINOBU (JP)
Application Number:
PCT/JP2018/010633
Publication Date:
September 19, 2019
Filing Date:
March 16, 2018
Export Citation:
Assignee:
OPTOTRIODE CO LTD (JP)
International Classes:
G01N21/39; G01N21/03; G01N21/21
Foreign References:
| JP2013160571A | 2013-08-19 | |||
| JP2017201253A | 2017-11-09 | |||
| JP2015175677A | 2015-10-05 | |||
| JP2015175846A | 2015-10-05 |
Other References:
GOTTI, RICCARDO: "Cavity-ring-down Doppler-broadening primary thermometry", PHYSICAL REVIEW A, vol. 97, 25 January 2018 (2018-01-25), pages 012512, XP055639024
YAMANAKA, TSUTOMU ET AL.: "On measurement accuracy of Liquid Water isotope Analyzer based on wavelength-Scanned Cavity Ring-Down Spectroscopy", REPORT OF THE UNIVERSITY OF TSUKUBA CENTER FOR RESEARCH IN ISOTOPES AND ENVIRONMENTAL DYNAMICS, no. 12, 2011, pages 31 - 40
HIRABAYASHI, YUUKI ET AL.: "NH3 gas concentration analysis using electronic cavity ring down spectroscopy.", PROCEEDINGS OF THE 60TH JSAP SPRING MEETING. JAPAN SOC. OF APPLIED PHYSICS., 2013
MAEDA, JOSHINOBU: "Multicasting and Low-noise Optical Amplification based on All-Optical triode", KANSAI 8 PRIVATE UNIVERSITIES, TECHN. INF. SESSION HANDOUT. JAPAN SCIENCE AND TECHNOLOGY AGENCY, 16 March 2012 (2012-03-16), Retrieved from the Internet
YAMANAKA, TSUTOMU ET AL.: "On measurement accuracy of Liquid Water isotope Analyzer based on wavelength-Scanned Cavity Ring-Down Spectroscopy", REPORT OF THE UNIVERSITY OF TSUKUBA CENTER FOR RESEARCH IN ISOTOPES AND ENVIRONMENTAL DYNAMICS, no. 12, 2011, pages 31 - 40
HIRABAYASHI, YUUKI ET AL.: "NH3 gas concentration analysis using electronic cavity ring down spectroscopy.", PROCEEDINGS OF THE 60TH JSAP SPRING MEETING. JAPAN SOC. OF APPLIED PHYSICS., 2013
MAEDA, JOSHINOBU: "Multicasting and Low-noise Optical Amplification based on All-Optical triode", KANSAI 8 PRIVATE UNIVERSITIES, TECHN. INF. SESSION HANDOUT. JAPAN SCIENCE AND TECHNOLOGY AGENCY, 16 March 2012 (2012-03-16), Retrieved from the Internet
Attorney, Agent or Firm:
IKEDA Haruyuki et al. (JP)
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