[go: up one dir, main page]

Chan et al., 1985 - Google Patents

10 km-long fibre-optic remote sensing of CH4 gas by near infrared absorption

Chan et al., 1985

Document ID
4363948158179455067
Author
Chan K
Ito H
Inaba H
Furuya T
Publication year
Publication venue
Applied physics B

External Links

Snippet

This paper reports for the first time the fully optical remote monitoring of low-level CH4 gas with a wide area coverage of 10 km in diameter realized by utilizing ultralowloss silica optical fibre link and a compact absorption cell in conjunction with highly radiant InGaAsP …
Continue reading at link.springer.com (other versions)

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infra-red light
    • G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infra-red light for analysing gases, e.g. multi-gas analysis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
    • G01N2021/396—Type of laser source
    • G01N2021/399—Diode laser
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colour
    • G01J3/28—Investigating the spectrum
    • G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
    • G01J3/433—Modulation spectrometry; Derivative spectrometry
    • G01J3/4338—Frequency modulated spectrometry
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colour
    • G01J3/28—Investigating the spectrum
    • G01J2003/2886—Investigating periodic spectrum
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N2021/1793—Remote sensing

Similar Documents

Publication Publication Date Title
Chan et al. 10 km-long fibre-optic remote sensing of CH4 gas by near infrared absorption
Chan et al. An optical-fiber-based gas sensor for remote absorption measurement of low-level CH 4 gas in the near-infrared region
Chan et al. Remote sensing system for near-infrared differential absorption of CH4 gas using low-loss optical fiber link
Uehara et al. Remote detection of methane with a 1.66-μm diode laser
Ma et al. Highly sensitive acetylene detection based on multi-pass retro-reflection-cavity-enhanced photoacoustic spectroscopy and a fiber amplified diode laser
McAleavey et al. Narrow linewidth, tunable Tm/sup 3+/-doped fluoride fiber laser for optical-based hydrocarbon gas sensing
Tai et al. Long-distance simultaneous detection of methane and acetylene by using diode lasers coupled with optical fibers
Whitenett et al. Optical fibre instrumentation for environmental monitoring applications
Weldon et al. H2S and CO2 gas sensing using DFB laser diodes emitting at 1.57 μm
US6862301B2 (en) Tunable laser assembly
Chan et al. Absorption Measurement of ν 2+ 2 ν 3 band of CH4 at 1.33 μ m Using an InGaAsP Light Emitting Diode
Dakin et al. A novel optical fibre methane sensor
Chan et al. Optical remote monitoring of CH4 gas using low‐loss optical fiber link and InGaAsP light‐emitting diode in 1.33‐μm region
WO1989003028A1 (en) Gas detection method and apparatus
Chan et al. All‐optical remote monitoring of propane gas using a 5‐km‐long, low‐loss optical fiber link and an InGaP light‐emitting diode in the 1.68‐μm region
Mohebati et al. Remote detection of gases by diode laser spectroscopy
Mazzoni et al. Trace detection of hydrazines by optical homodyne interferometry
Chan et al. All-optical fiber-based remote sensing system for near infrared absorption of low-level CH 4 gas
Alarcon et al. All-optical remote sensing of city gas through CH4 gas absorption employing a low-loss optical fiber link and an InGaAsP light-emitting diode in the near-infrared region
CN113804649B (en) Single-frequency thulium-doped inner cavity mixed gas component identification concentration detection optical fiber sensing system
Inaba Optical remote sensing of environmental pollution and danger by molecular species using low-loss optical fiber network system
Dakin et al. Review of methods of optical gas detection by direct optical spectroscopy, with emphasis on correlation spectroscopy
Chan et al. Optical-fibre remote sensing system of low-level propane gas using a 1· 68 μm InGaAs light emitting diode
EP0364642A1 (en) Gas detection method and apparatus
Inaba et al. All-optical remote gas sensor system over a 20 km range based on low-loss optical fibers in the near infrared region