Song A, Jin K, Xu C, Li J, Guo Y, Wei K. Subcarrier modulation based phase-coded coherent lidar.
OPTICS EXPRESS 2024;
32:52-61. [PMID:
38175062 DOI:
10.1364/oe.504166]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 10/10/2023] [Indexed: 01/05/2024]
Abstract
This paper presents a lean subcarrier modulation-based phase-coded coherent lidar system with a non-quadrature receiver and sampling ratio lower than the Nyquist sampling ratio. Specifically, by utilizing the drawbacks of low Doppler tolerance in encoding signals, phase information can be obtained after pulse compression, and the mirror frequency introduced by real sampling can be negligible. Validation experiments based on inverse synthetic aperture lidar are performed, with the corresponding imaging results having a resolution superior to 4 cm, demonstrating our system's efficiency in phase acquisition that is free from frequency aliasing.
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