Optical fiber transceiver integrated air differential optical absorption spectroscopy (DOAS) measuring system
A technology of differential absorption spectroscopy and measurement system, which is applied in the field of monitoring systems for measuring trace gases in the air. It can solve the problems of instrument adjustment and optical path alignment difficulties, and low spectral utilization efficiency of DOAS systems, so as to simplify instrument adjustment and alignment. process, improving spectral utilization efficiency, and avoiding occlusion effects
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[0013] figure 2 Shown is the optical fiber transceiver integrated air differential absorption spectroscopy measurement system provided by the present invention, which includes a point light source (xenon lamp) 6 capable of emitting a wide spectrum structure, a telescope and a spectrometer (not shown in the figure). Wherein the telescope includes: a spherical reflector 9, and a corner cube prism 10 at the other end of the optical path of the telescope. In addition, the system also includes a transceiver integrated optical fiber bundle structure (such as image 3 As shown), the fiber bundle structure is composed of a transmitting optical fiber 12 and a receiving optical fiber 13, one end of which is fixed together to become the common end 8 of the transmitting and receiving optical fiber, the common end is located on the optical axis of the telescope, assuming that the radius of the spherical mirror 9 is R, then The distance between the common end of the transmitting and recei...
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