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20 December 2019 Single-source double heterodyne coherent detection high-speed moving target
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Proceedings Volume 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019); 112093V (2019) https://doi.org/10.1117/12.2548979
Event: Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 2019, Xi'an, China
Abstract
A novel single-source double-heterodyne coherent detection high-speed moving target is presented. Under a limited detector bandwidth condition, the method inherits the characteristics of dual frequency laser coherent detection and transforms the Doppler shift of a high-speed moving target to low frequency using the beat frequency difference method. Compared with the traditional heterodyne detection system, the maximum speed detectable range of the system is greatly increased. The double-heterodyne mixing process is deduced, and the relationship between the beat frequency, detector bandwidth, and maximum detectable speed of the system is obtained through analysis. Thus, the beat frequency can be dynamically adjusted for the system to adapt to different measurement environments. Different signal components and speed information extraction methods of detectors under different motion speeds are analyzed. The feasibility of the method is verified through simulation. Moreover, the data acquisition is minimal, and the system has good real-time performance.
© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jianying Ren Sr., Huayan Sun, Laixian Zhang, and Yanzhong Zhao "Single-source double heterodyne coherent detection high-speed moving target", Proc. SPIE 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 112093V (20 December 2019); https://doi.org/10.1117/12.2548979
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