Improving the sensitivity and bandwidth of time-of-flight scanning LIDAR using few-mode preamplified receivers
Improving the sensitivity and bandwidth of time-of-flight scanning LIDAR using few-mode preamplified receivers
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DOI：
10.1117/1.oe.61.12.123106
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发表时间：
2022-12
影响因子：
1.3
通讯作者：
Rachel Sampson;Huiyuan Liu;Guifang Li
中科院分区：
文献类型：
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作者：
Rachel Sampson;Huiyuan Liu;Guifang Li
抽象的。在电信领域，众所周知，光学前置放大接收器在直接检测测量中比线性模式（LM）雪崩光电二极管（APD）提供更好的灵敏度。然而，长距离光探测和测距（LiDAR）主要利用LM APD进行探测。这种差异是由于激光雷达和单模光学前置放大器中多模返回信号之间的高耦合损耗造成的。最近，少模（FM）光前置放大器已被实验证明，解决了这种模式失配。我们评估的适用性FM前置放大接收器的远程脉冲激光雷达相比，目前部署的LM APD通过考虑两个接收器的噪声，增益和带宽特性。我们表明，FM前置放大接收机可以提供接收机的信噪比和带宽的改善。
Abstract. Within telecommunications, it is well established that optical preamplified receivers offer better sensitivity than linear-mode (LM) avalanche photodiodes (APDs) for direct-detection measurements. Long-range light detection and ranging (LiDAR), however, has predominantly made use of LM APDs for detection. This discrepancy arose due to the high coupling loss between the multimode return signals in LiDAR and single-mode optical preamplifiers. Recently, few-mode (FM) optical preamplifiers have been experimentally demonstrated, which solve this modal mismatch. We evaluate the applicability of FM preamplified receivers to long-range pulsed LiDAR in comparison with currently deployed LM APDs by considering the two receivers’ noise, gain, and bandwidth characteristics. We show that FM preamplified receivers can offer an improvement in both receiver signal-to-noise ratio and bandwidth.