Gas concentration detection method and equipment based on ring-shaped optical fiber laser

A gas concentration detection, ring-shaped fiber technology, applied in color/spectral characteristic measurement, instruments, measurement devices, etc., can solve the problems of sensor integration and packaging problems, increase the effective absorption length, strong anti-electromagnetic interference ability, easy to integrate Effect

Inactive Publication Date: 2006-06-28
ZHEJIANG UNIV
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  • Abstract
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Problems solved by technology

The above methods often need to use geometric optics to increase the travel of light in the gas to be measured or use ...

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  • Gas concentration detection method and equipment based on ring-shaped optical fiber laser
  • Gas concentration detection method and equipment based on ring-shaped optical fiber laser

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Embodiment Construction

[0020] Such as figure 1 with 2 As shown, the output end of the fiber amplifier 5 is optically connected to one end of the tunable filter 4, the other end of the tunable filter 4 is optically connected to one end of the tapered optical fiber 3 installed in the gas chamber 2, and the optical connection of the tapered optical fiber 3 is The other end is optically connected to the input end of the isolator 1, the output end of the isolator 1 is optically connected to the input end of the coupler 7, the coupling arm of the large component of the coupler 1 is optically connected to the input end of the fiber amplifier, so far the fiber amplifier 5, The tunable filter 4, the tapered fiber 3, the isolator 1 and the coupler 7 constitute a ring fiber laser. The coupling arm of the small component of the coupler 1 is optically connected to the photodetector 6 as the output end of the laser. The tapered fiber has a diameter of 2 microns and a length of 10 cm.

[0021] The gas to be mea...

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Abstract

A method for detecting concentration of gas based on circular optical fiber laser includes applying conical optical fiber, raising measurement accuracy by utilizing laser resonance to increase effective action length based on evanescent wave absorption in optical fiber laser cavity and realizing concentration measurement of different gas by applying tunable filter.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and in particular relates to a gas concentration detection method and equipment based on evanescent wave absorption in a ring fiber laser cavity. Background technique [0002] With the progress of human civilization, atmospheric resources and various gases have become the focus of attention. On the one hand, air pollution has become one of the most concerned issues, and there is an urgent need for effective monitoring of various harmful, toxic, flammable, and explosive gases produced in industry and transportation; on the other hand, in the use of various When various gases are used, such as the development and use of various natural gas, coal gas, liquefied petroleum gas, or gas systems used in the aerospace industry, the concentration detection of various gases is indispensable. [0003] Due to its many advantages (compact structure, easy to make system with optical fiber network...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N21/17
Inventor 陈达如管祖光何赛灵
Owner ZHEJIANG UNIV
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