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An active cavity absorption type acetylene concentration detection system and its detection method

A concentration detection and absorption type technology, applied in the field of active cavity absorption type acetylene concentration detection system, can solve the problems of inability to meet various needs and low sensitivity, and achieve the effect of improving sensitivity and improving sensitivity

Inactive Publication Date: 2011-12-21
TIANJIN UNIV
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Problems solved by technology

[0004] When detecting the concentration of acetylene, the use of optical fiber active cavity gas detection technology will have the problem of low sensitivity, which cannot meet various needs in practical applications

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  • An active cavity absorption type acetylene concentration detection system and its detection method
  • An active cavity absorption type acetylene concentration detection system and its detection method
  • An active cavity absorption type acetylene concentration detection system and its detection method

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] In order to improve the sensitivity of acetylene concentration detection and meet the high sensitivity requirements in practical applications, the embodiment of the present invention provides an active lumen absorption type acetylene concentration detection system and its detection method, see the following description for details:

[0032] Active intracavity gas detection technology is a detection technology that places the sample in the laser resonator, that is to say, there is a sample absorption medium in the laser resonator besides the laser gain medium. The intracavity beam is both the laser oscillation line and the sample absorption line. Active fiber optic acetylene gas detection usually uses erbium-doped fiber as the ga...

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Abstract

The invention discloses an active inner cavity absorption type acetylene concentration detection system and a detection method thereof, and relates to the field of optical fiber sensing and optical fiber gas detection, and the first end fusion of a 980nm or 1480nm semiconductor laser and a 980nm / 1550nm wavelength division multiplexer; The single-mode fiber on the second end of the 980nm / 1550nm wavelength division multiplexer is flexibly connected to the erbium-doped photonic crystal fiber; the third end of the 980nm / 1550nm wavelength division multiplexer is connected to the first fiber Bragg grating; the erbium-doped photonic crystal The other end of the optical fiber is connected to the fiber mirror; the fiber mirror and the first fiber Bragg grating constitute the first resonant cavity outputting 1531.58nm laser; the fiber reflecting mirror and the second fiber Bragg grating constitute the second resonant cavity outputting 1535nm laser; Except 1535nm laser; the power meter outputs 1531.58nm laser power.

Description

technical field [0001] The invention relates to the field of optical fiber sensing and optical fiber gas detection, in particular to an active cavity absorption type acetylene concentration detection system and a detection method thereof. Background technique [0002] In the process of industrial production, timely and accurate monitoring, forecasting and automatic control of flammable, explosive, toxic and harmful gases have become one of the important problems to be solved in the current coal, petroleum, chemical and electric power industries. Based on the gas spectral absorption method, the long-distance detection of hazardous gas concentration using the low-loss window (1-2 μm) of silica optical fiber has gained widespread attention. In this band, many polluting gases or toxic gases are found, such as: acetylene (C 2 h 2 ), methane (CH 4 ), carbon monoxide (CO) and ammonia (NH3) and other gases have absorption lines. Among them, acetylene is a faulty gas in transform...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/01
Inventor 陆颖黄晓慧景磊温午麒姚建铨
Owner TIANJIN UNIV
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