Device and method for multiband Simultaneous measurements of high-spectral-resolution total atmospheric transmissivity

A technology of atmospheric transmittance and measurement method, which is applied in the field of high-resolution multi-band simultaneous real-time measurement of the atmospheric transmittance of the entire layer, can solve problems such as the influence of the stability of laser heterodyne devices, and achieves important application value and high resistance to resistance. Environmental interference, the effect of enhancing anti-interference ability

Inactive Publication Date: 2017-11-24
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

However, the beam combining process of local oscillator laser and signal light in common laser heterodyne devices mostly adopts free space optical transmission, which is easily affected by the external environment (such as vibration, atmospheric turbulence, etc.), which affects the stability of laser heterodyne devices

Method used

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  • Device and method for multiband Simultaneous measurements of high-spectral-resolution total atmospheric transmissivity
  • Device and method for multiband Simultaneous measurements of high-spectral-resolution total atmospheric transmissivity
  • Device and method for multiband Simultaneous measurements of high-spectral-resolution total atmospheric transmissivity

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with specific embodiments.

[0049] like image 3 As shown, the measuring device of the present invention includes:

[0050] Optical coupling module ( figure 2 ) consists of three parts (1-3), the converging lens (1) is installed on the fixed bracket and is parallel to the sun tracking device (4), the received sunlight is condensed by the converging lens (1) and incident on the optical fiber (3) ) end face, the fiber end face is at the position of the focal point of the lens.

[0051] 3 optical coupling modules ( figure 2 ) output three beams of sunlight signals, and then combined with the local oscillator light (5-7) of different emission wavelengths through the beam combiner (8) and incident on the heterodyne detector (9), the detected signals are passed through the intermediate frequency After the filter (10) and the square-law detector (11), the acquired high-resolution heterodyne signal is i...

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Abstract

The invention discloses a device and method formultiband Simultaneous measurements of high-spectral-resolution total atmospheric transmissivity. A solar tracker is utilized for mounting multiple optical coupling modules and coupling a signal light into an optical fiber, and an optical fiber beam combiner is utilized for combining a local oscillation light and the signal light, so that multiband all-fiber high-spectral-resolution total atmospheric transmissivity measurement is realized. The device utilizes transmission and beam combination of the light in the optical fiber and replaces the traditional free space transmission and beam combination, so that stability is greatly improved, and antijamming capability of laser heterodyne is enhanced; meanwhile, the solar tracker is utilized for mounting multiple optical coupling modules, beam combination is carried out on multiple local oscillation lights and heterodyning is carried out, multiband laser heterodyne signals can be obtained at the same time, and real-time measurement of high-resolution total atmospheric transmissivity in a band range of a local oscillation light source is realized. Therefore the device disclosed by the invention can be applied to the fields of meteorological research, atmospheric pollution monitoring and atmospheric optical characteristic measurement.

Description

technical field [0001] The invention relates to the field of laser atmospheric transmission transmittance measurement, in particular to a device and a measurement method for simultaneous real-time measurement of high-resolution whole-layer atmospheric transmittance in multiple bands based on a laser heterodyne method combined with sun tracking, belonging to the field of optics. Background technique [0002] Whole layer atmospheric transmittance is an important atmospheric parameter in the fields of atmospheric radiation, remote sensing of earth resources, air quality monitoring, space target monitoring, laser atmospheric transmission, etc. In addition to the above research, it can also be applied to long-distance or whole-layer atmospheric transmittance measurement, multi-component greenhouse gas profile inversion and other fields. [0003] At present, the commonly used whole-layer atmospheric transmittance measurement devices mainly include solar radiometers and Fourier tra...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/25
CPCG01N21/25
Inventor 曹振松高晓明黄印博谈图刘强梅海平饶瑞中
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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