Single-pixel imaging with heralded single photons
Single-pixel imaging with heralded single photons
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DOI：
10.1364/optcon.458248
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发表时间：
2022-03
期刊：
影响因子：
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通讯作者：
Steven D. Johnson;A. McMillan;Cyril Torre;S. Frick;J. Rarity;M. Padgett
中科院分区：
文献类型：
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作者：
Steven D. Johnson;A. McMillan;Cyril Torre;S. Frick;J. Rarity;M. Padgett
11.传统的遥感应用往往是以脉冲激光照明为基础的，其线宽和重复频率都很窄，不利于秘密行动。无论采用何种方法进行隐蔽感测，关键要求是探测光与背景照明无法区分。我们提出了一种执行单像素成像的方法，该方法通过使用自发参数下转换产生的相关光子对来抑制背景光的影响，从而提高信噪比。光子对中的一个光子用于照射物体，而另一个光子用作时间参考，从而使信号光子与背景噪声区分开来。这种预示方法显示了噪声机制是如何产生更高对比度图像的关键。
11 Traditional remote sensing applications are often based on pulsed laser illumination with a narrow linewidth and characteristic repetition rate, which are not conducive to covert operation. Whatever methods are employed for covert sensing, a key requirement is for the probe light to be indistinguishable from background illumination. We present a method to perform single-pixel imaging that suppresses the effect of background light and hence improves the signal-to-noise ratio by using correlated photon-pairs produced via spontaneous parametric down conversion. One of the photons in the pair is used to illuminate the object whilst the other acts as a temporal reference, allowing the signal photons to be distinguished from background noise. This heralding method shows how the noise regime is key to producing higher contrast images.