Laser Phase Noise Compensation Method Based on Dual Reference Channels in Inverse Synthetic Aperture Lidar
Laser phase noise is a critical factor that limits the range and performance of coherent lidar systems, especially in high-resolution applications such as inverse synthetic aperture lidar (ISAL), which demands stringent coherence. The effective suppression of laser phase noise is essential to enable...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-12-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/17/1/30 |
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| author | Dengfeng Liu Chen Xu Yutang Li Anpeng Song Jian Li Kai Jin Xi Luo Kai Wei |
| author_facet | Dengfeng Liu Chen Xu Yutang Li Anpeng Song Jian Li Kai Jin Xi Luo Kai Wei |
| author_sort | Dengfeng Liu |
| collection | DOAJ |
| description | Laser phase noise is a critical factor that limits the range and performance of coherent lidar systems, especially in high-resolution applications such as inverse synthetic aperture lidar (ISAL), which demands stringent coherence. The effective suppression of laser phase noise is essential to enable high-resolution imaging over long distances. This paper presents a phase noise compensation technique utilizing dual reference channels (DRCs) based on concatenated generated phase (CGP) principles. The proposed method uses two reference channels with different delay lengths: a long-delay channel for coarse phase noise compensation and a short-delay channel for fine adjustments. We performed ISAL imaging experiments on stationary and rotating targets using a seed laser with a 3.41 MHz linewidth, achieving round-trip distances exceeding 110 times the laser coherence length. Imaging quality closely matched a 100 Hz narrow linewidth laser, approaching theoretical resolution limits. Compared to prior methods based on residual error linear estimation, the DRC method enhances compensation speed tenfold while maintaining accuracy. These results highlight the efficacy of the proposed DRC method in mitigating laser phase noise, significantly improving ISAL imaging performance. |
| format | Article |
| id | doaj-art-5361604dfd744d9bbad1157a850a5128 |
| institution | Kabale University |
| issn | 2072-4292 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj-art-5361604dfd744d9bbad1157a850a51282025-01-10T13:20:00ZengMDPI AGRemote Sensing2072-42922024-12-011713010.3390/rs17010030Laser Phase Noise Compensation Method Based on Dual Reference Channels in Inverse Synthetic Aperture LidarDengfeng Liu0Chen Xu1Yutang Li2Anpeng Song3Jian Li4Kai Jin5Xi Luo6Kai Wei7National Laboratory on Adaptive Optics, Chengdu 610209, ChinaNational Laboratory on Adaptive Optics, Chengdu 610209, ChinaNational Laboratory on Adaptive Optics, Chengdu 610209, ChinaZhejiang University, Hangzhou 310027, ChinaZhejiang University, Hangzhou 310027, ChinaZhejiang University, Hangzhou 310027, ChinaNational Laboratory on Adaptive Optics, Chengdu 610209, ChinaZhejiang University, Hangzhou 310027, ChinaLaser phase noise is a critical factor that limits the range and performance of coherent lidar systems, especially in high-resolution applications such as inverse synthetic aperture lidar (ISAL), which demands stringent coherence. The effective suppression of laser phase noise is essential to enable high-resolution imaging over long distances. This paper presents a phase noise compensation technique utilizing dual reference channels (DRCs) based on concatenated generated phase (CGP) principles. The proposed method uses two reference channels with different delay lengths: a long-delay channel for coarse phase noise compensation and a short-delay channel for fine adjustments. We performed ISAL imaging experiments on stationary and rotating targets using a seed laser with a 3.41 MHz linewidth, achieving round-trip distances exceeding 110 times the laser coherence length. Imaging quality closely matched a 100 Hz narrow linewidth laser, approaching theoretical resolution limits. Compared to prior methods based on residual error linear estimation, the DRC method enhances compensation speed tenfold while maintaining accuracy. These results highlight the efficacy of the proposed DRC method in mitigating laser phase noise, significantly improving ISAL imaging performance.https://www.mdpi.com/2072-4292/17/1/30inverse synthetic aperture lidarlaser phase noise compensationconcatenately generated phasedual reference channels |
| spellingShingle | Dengfeng Liu Chen Xu Yutang Li Anpeng Song Jian Li Kai Jin Xi Luo Kai Wei Laser Phase Noise Compensation Method Based on Dual Reference Channels in Inverse Synthetic Aperture Lidar Remote Sensing inverse synthetic aperture lidar laser phase noise compensation concatenately generated phase dual reference channels |
| title | Laser Phase Noise Compensation Method Based on Dual Reference Channels in Inverse Synthetic Aperture Lidar |
| title_full | Laser Phase Noise Compensation Method Based on Dual Reference Channels in Inverse Synthetic Aperture Lidar |
| title_fullStr | Laser Phase Noise Compensation Method Based on Dual Reference Channels in Inverse Synthetic Aperture Lidar |
| title_full_unstemmed | Laser Phase Noise Compensation Method Based on Dual Reference Channels in Inverse Synthetic Aperture Lidar |
| title_short | Laser Phase Noise Compensation Method Based on Dual Reference Channels in Inverse Synthetic Aperture Lidar |
| title_sort | laser phase noise compensation method based on dual reference channels in inverse synthetic aperture lidar |
| topic | inverse synthetic aperture lidar laser phase noise compensation concatenately generated phase dual reference channels |
| url | https://www.mdpi.com/2072-4292/17/1/30 |
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