光学学报, 2022, 42 (13): 1311001, 网络出版: 2022-07-15  

光子集成干涉成像系统的信号能量与噪声分析 下载: 997次封底文章

Analysis of Signal Energy and Noise in Photonic Integrated Interferometric Imaging System
作者单位
浙江大学现代光学仪器国家重点实验室,浙江 杭州 310027
摘要

光子集成干涉成像是一种基于光子集成芯片获取目标傅里叶频谱信息的新兴成像技术。目前,能量损耗与噪声干扰是制约该技术发展的关键因素。为分析它们对光子集成干涉成像系统的影响,研究了基线长度与干涉信号能量的关系和噪声对成像质量的影响。研究结果表明输出信号的能量处于纳瓦量级。干涉信号的振幅与对比度会随着基线长度的增加而迅速减小。长基线下的干涉信号振幅极小,在探测器精度不够的情况下,干涉信号的对比度将无法获取。综合来看,光子集成干涉成像系统适合采集目标的低频信息,并且当将噪声控制在干涉信号强度的10-3、相位误差控制在1/40λ时才不会对成像结果产生较大的影响。

Abstract

Photonic integrated interferometric imaging is an emerging imaging technology. It uses photonic integrated circuits to obtain the Fourier spectrum of the target. At present, energy loss and noise interference are the key factors restricting the development of this technology. To analyze their impact on photonic integrated interferometric imaging systems, this paper studies the relationship between the baseline length and the interference signal energy and the effect of noise on imaging quality. The results show that the energy of the output signal is at the nanowatt level. The amplitude and visibility of the interference signal decay sharply as the baseline length increases. The amplitude of the interference signal under the long baseline is extremely small. In the case of insufficient detector accuracy, the visibility of the interference signal cannot be obtained. Overall, the photonic integrated interferometric imaging systems are suitable for collecting low-frequency signals of the target. In addition, the noise controlled at 10-3 of the interference signal strength and the phase error controlled at 1/40λ will not greatly affect the imaging result.

张自然, 吕国冕, 冯华君, 徐之海, 李奇, 周浩, 陈跃庭. 光子集成干涉成像系统的信号能量与噪声分析[J]. 光学学报, 2022, 42(13): 1311001. Ziran Zhang, Lü Guomian, Huajun Feng, Zhihai Xu, Qi Li, Hao Zhou, Yueting Chen. Analysis of Signal Energy and Noise in Photonic Integrated Interferometric Imaging System[J]. Acta Optica Sinica, 2022, 42(13): 1311001.

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