Gas cell device for photon crystal optical fibre gas sensing
A photonic crystal fiber, gas sensing technology, applied in the direction of color/spectral characteristic measurement, etc., can solve the problem that the gas chamber device has not been well developed, and achieve the effect of strong adjustability and simple structure
Inactive Publication Date: 2008-01-16
YANSHAN UNIV
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Problems solved by technology
[0002] With the development of industrialization and the emission of various harmful gases, it is necessary to detect these gases in a timely and effective manner. The emergence of photonic crystal fibers provides a new opportunity for the high-sensitivity detection of weakly absorbing gases, but the related gas chamber device It has not been well developed. For this reason, the inventor has designed a lens-adjustable gas chamber device suitable for using photonic crystal fibers with different outer diameters to perform gas sensing tests in different light bands, so that the photonic crystal fiber gas detection technology can be more widely used
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[0011] Fig. 1 is an embodiment disclosed by the present invention. According to the detection requirements, a cylindrical air chamber chamber 5 is made of glass material according to a template, with an air inlet 3 and an air outlet 6 thereon. Make circular air chamber end cover 2 with metal material, fix on the two ends of air chamber cavity 5 with screw 1, there is an internal thread hole 7 on the air chamber end cover 2, be used for fixing metal external thread ring 8. The external threaded ring 8 matches the internal threaded hole 7 on the air chamber end cover 2, and the inner diameter of the metal external threaded ring 8 fixes the lens 9. According to the needs, the lens 9 with different focal lengths can be selected to be installed in the metal external threaded ring 8, realizing Lens adjustable function. The optical fiber clamp 4 is made of glass material into a hollow structure, which can facilitate the circulation of gas in the air chamber. The center of the optical...
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The invention discloses an air chamber device for the optical fiber gas sensing of photonic crystal. An air inlet (3), an air outlet (6) and two optical fiber clamps (4) are provided on a cylindrical glass air chamber cavity (5). An air pressure gauge is arranged at the air outlet (6), and air chamber end caps (2) are arranged on the two sides of the air outlet (6). The optical fiber clamps (4) is a hollow structure with gaps, a round hole is provided on the middle part of the hollow structure, and a rubber plug (11) which has a small hole in the center is put into the round hole. Screwed holes (7) are processed on the center of the air chamber end caps (2), and the Screwed holes (7) are matched with an outer screwed ring (8) which is arranged with a lens (9) which can be changed. The optical fiber replacing of the light quantum crystal bodies which have different outer diameters can be realized in one gas sensing process, and the replacing of coupling lens of different light wave bands also can be realized.
Description
technical field [0001] The invention relates to a gas chamber device for photonic crystal fiber gas sensing. Background technique [0002] With the development of industrialization and the emission of various harmful gases, it is necessary to detect these gases in a timely and effective manner. The emergence of photonic crystal fibers provides a new opportunity for the high-sensitivity detection of weakly absorbing gases, but the related gas chamber device It has not been well developed. For this reason, the inventor has designed a lens-adjustable gas chamber device suitable for using photonic crystal fibers with different outer diameters to perform gas sensing tests in different light bands, so that the photonic crystal fiber gas detection technology can be applied more widely. Contents of the invention [0003] Due to its porous characteristics, photonic crystal fiber has advantages in gas sensing and detection. In order to meet the needs of photonic crystal fiber with ...
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Inventor 李曙光程同蕾
Owner YANSHAN UNIV