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arXiv 1206.4265physics.optics
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合成孔径laser光学反馈成像的局限性

Limitations of synthetic aperture laser optical feedback imaging

Wilfried Glastre, Olivier Jacquin, Olivier Hugon, Hugues Guillet De Chatellus, Eric Lacot

摘要:

本文研究了合成孔径(SA)成像系统中幅相噪声的来源及其对激光光学反馈成像(LOFI)的影响。振幅噪声相当于光子噪声,是一种加性噪声,可以通过增加全局测量时间来降低。相位噪声可以分为三个家庭:随机,正弦和漂移相位噪声,我们表明,它作为一个乘性噪声。我们解释了如何通过过采样或根据其类型进行多次测量来降低相位噪声。这项工作可以很容易地扩展到所有SA系统(雷达,激光或太赫兹),特别是当原始全息图逐点采集。

英文摘要:

In this paper we study the origin and the effect of amplitude and phase noise on Laser Optical Feedback Imaging (LOFI) associated with Synthetic Aperture (SA) imaging system. Amplitude noise corresponds to photon noise and acts as an additive noise, it can be reduced by increasing the global measurement time. Phase noise can be divided in three families: random, sinusoidal and drift phase noise; we show that it acts as a multiplicative noise. We explain how we can reduce phase noise by making oversampling or multiple measurements depending on its type. This work can easily be extended to all SA systems (Radar, Laser or Terahertz), especially when raw holograms are acquired point by point.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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