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Towards combined quantum bit detection and spatial tracking using an arrayed single-photon sensor
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DOI：10.1364/OE.416143.png)
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Abstract
En 中文
Experimental quantum key distribution through free-space channels requires accurate pointing-and-tracking to co-align telescopes for efficient transmission. The hardware requirements for the sender and receiver could be drastically reduced by combining the detection of quantum bits and spatial tracking signal using two-dimensional single-photon detector arrays. Here, we apply a two-dimensional CMOS single-photon avalanche diode detector array to measure and monitor the single-photon level interference of a free-space time-bin receiver interferometer while simultaneously tracking the spatial position of the single-photon level signal. We verify an angular field-of-view of 1.28 degrees and demonstrate a post-processing technique to reduce background noise. The experimental results show a promising future for two-dimensional single-photon detectors in low-light level free-space communications, such as quantum communications. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License.
Keywords:
KEY DISTRIBUTION
Journal
IF:
3.3
Papers:
6.1W
Citations:
14.3W