Title:
EVANESCENT-FIELD-BASED GAS DETECTION DEVICE AND EVANESCENT-FIELD-BASED GAS DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/248481
Kind Code:
A1
Abstract:
The present invention provides an evanescent-field-based gas detection device and an evanescent-field-based gas detection method. The gas detection device comprises a laser, a gas sensing unit, a filter amplifier and a phase-locked amplifier; the gas sensing unit comprises an optical waveguide and a photoelectric detector; and the optical waveguide comprises a sensing area and a resonant cavity provided in the sensing area, the resonant wavelength of the resonant cavity being consistent with the absorption wavelength of a target gas, so that the accuracy and sensitivity of target gas concentration detection is improved.
Inventors:
ZENG XIANGLONG (CN)
LIU HONGGANG (CN)
GUO ANBO (CN)
YU XIAO (CN)
LIU HONGGANG (CN)
GUO ANBO (CN)
YU XIAO (CN)
Application Number:
PCT/CN2019/115280
Publication Date:
December 17, 2020
Filing Date:
November 04, 2019
Export Citation:
Assignee:
SUZHOU PROMISENSE ELECTRONIC TECH CO LTD (CN)
International Classes:
G01N21/84; G01N21/01; G01N21/31; G01N21/41; G01N21/55
Foreign References:
| CN110095467A | 2019-08-06 | |||
| CN105699328A | 2016-06-22 | |||
| CN105699328A | 2016-06-22 | |||
| CN101424619A | 2009-05-06 | |||
| CN104266983A | 2015-01-07 | |||
| US20110277540A1 | 2011-11-17 |
Attorney, Agent or Firm:
SUZHOU WISPRO INTELLECTUAL PROPERTY AGENCY (CN)
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