期刊
ACS PHOTONICS
卷 9, 期 3, 页码 820-829出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.1c01303
关键词
information transmission; optical encryption; orbital angular momentum; deep learning; speckle imaging
类别
资金
- National Natural Science Foundation of China [91750205, U1701661, 61935013, 61975128, 61905147, 61805165]
- Leading Talents Program of Guangdong Province [00201505]
- Natural Science Foundation of Guangdong Province [2016A030312010, 2019TQ05X750, 2020A1515010598]
- Science, Technology and Innovation Commission of Shenzhen Municipality [JCYJ20180507182035270, KQTD2017033011044403, ZDSYS201703031605029, KQTD20180412181324255, JCYJ2017818144338999]
- Shenzhen University Starting Fund [2019073]
This paper proposes a novel optical encryption transmission technique based on orbital angular momentum (OAM), which converts OAM to speckle patterns and utilizes a convolutional neural network (CNN) for decryption. The experiment demonstrates the effectiveness and feasibility of the technique, providing a new solution for OAM-based encrypted optical information transmission.
Orbital angular momentum (OAM)-based optical encryption transmission plays an important role in optical communications. However, it remains challenging to encrypt the data with great security and decrypt them with high fidelity while maintaining large-capacity transmission. In this paper, we propose a novel optical encryption transmission technique, which dynamically converts OAM modes into speckle patterns with a randomly shaking diffuser for high-security encryption, and a pretrained convolutional neural network (CNN) is later employed to extract encoded information hidden in the speckle patterns for high-fidelity information decryption. Our experiment demonstrates that the modulated OAM with an interval of a topological charge as small as 0.01 can be recognized by the CNN with an accuracy of 99.83%. To demonstrate its application, a cat image, encoded and encrypted by the designed system, has been successfully decrypted and decoded with a bit error rate of 0.008%. The security mechanism of the technique has also been experimentally verified and discussed. This technique thereby provides a new avenue for OAM-based encrypted optical information transmission.
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