High-resolution 3D imaging with a low-pixel APD array through multi-beam scanning of fiber-type OPA

Chunbo Liu; Zhengxuan Chen; Ruyuan Liu; Xiaobin Wang; Xu Zhao; Xiang'e Han

doi:10.1117/12.2603243

31 August 2021 High-resolution 3D imaging with a low-pixel APD array through multi-beam scanning of fiber-type OPA

Chunbo Liu, Zhengxuan Chen, Ruyuan Liu, Xiaobin Wang, Xu Zhao, Xiang'e Han

Proceedings Volume 11907, Sixteenth National Conference on Laser Technology and Optoelectronics; 1190731 (2021) https://doi.org/10.1117/12.2603243
Event: Sixteenth National Conference on Laser Technology and Optoelectronics, 2021, Shanghai, China

Abstract

To improve the performance of laser scanning 3D imaging, a new multi-beam imaging method based on the fiber-type optical phased array (OPA) is proposed. In the system, the fast scanning multiple beams, coherently combined from the fiber-type OPA, are employed to cover the whole field-of-view (FOV), and each sub-beam is only responsible for a small local FOV; in the meanwhile, a low-pixel APD array is utilized to receive the echoes from the target in the FOV, each pixel of which is also for a corresponding local FOV. Consequently, making use of fast multi-beam scanning and an APD array detector, a fast and high-resolution imaging can be obtained. In this paper, the imaging principle using the multibeam scanning of fiber-type OPA will be first introduced, and then the principle of high-resolution imaging with a lowpixel APD array detector is illustrated. Finally, the 3D imaging experiment of model targets with a proof-of-concept system is presented.

Citation Download Citation

Chunbo Liu, Zhengxuan Chen, Ruyuan Liu, Xiaobin Wang, Xu Zhao, and Xiang'e Han "High-resolution 3D imaging with a low-pixel APD array through multi-beam scanning of fiber-type OPA", Proc. SPIE 11907, Sixteenth National Conference on Laser Technology and Optoelectronics, 1190731 (31 August 2021); https://doi.org/10.1117/12.2603243

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KEYWORDS

Avalanche photodetectors

Imaging systems

Sensors

Detector arrays

Phased array optics

Image resolution

Target detection

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