The Science Island team has made new progress in the research of high-resolution

Recently, Xu Zhenyu, associate researcher of angung Institute of Hefei Research Institute of Chinese Academy of Sciences, and scientific research personnel of the research group have made new breakthroughs in the research of laser heterodyne spectroscopy technology. Relevant research results have been published in Optics Letters, and this paper has been included in editor's pick.

Laser heterodyne spectrometer has gradually developed into a complementary measuring tool for greenhouse gas column concentration and profile with ground-based Fourier transform spectrometer due to its advantages such as high spectral resolution, small size and easy integration. Limited by the theory of optical antenna, laser heterodyne spectroscopy cannot improve the signal-to-noise ratio of heterodyne signal by increasing the optical receiving aperture, which leads to the limited measurement accuracy of gas profile in high-resolution laser heterodyne detection.

In this regard, Dr. Deng Hao, a scientific research team of angung Institute, first proposed a weak sunlight amplification method based on semiconductor light amplification technology, which solved the problem of improving the signal-to-noise ratio of heterodyne signals limited by the optical antenna theory in high-resolution laser heterodyne detection. The research results show that the developed high-resolution laser heterodyne spectrometer based on semiconductor light amplification has greatly improved the weak light signal detection and gas concentration measurement accuracy compared with the traditional high-resolution laser heterodyne spectrometer.

Postdoctoral researcher Deng Hao is the first author of the paper, and associate researcher Xu Zhenyu and researcher Kan Ruifeng are the corresponding authors of the paper. The research was supported by the National Natural Science Foundation of China and the national key research and development program.

Schematic diagram of experimental device of laser heterodyne spectrometer based on semiconductor optical amplification technology

Signal comparison measurement results

Source: Hefei Institute of material science, Chinese Academy of Sciences