Spitz Olivier, Herdt Andreas, Wu Jiagui, Maisons Grégory, Carras Mathieu, Wong Chee-Wei, Elsäßer Wolfgang, Grillot Frédéric
LTCI, Télécom Paris, Institut Polytechnique de Paris, Palaiseau, France.
mirSense, Centre d'intégration NanoInnov, Palaiseau, France.
Nat Commun. 2021 Jun 7;12(1):3327. doi: 10.1038/s41467-021-23527-9.
Mid-infrared free-space optical communication has a large potential for high speed communication due to its immunity to electromagnetic interference. However, data security against eavesdroppers is among the obstacles for private free-space communication. Here, we show that two uni-directionally coupled quantum cascade lasers operating in the chaotic regime and the synchronization between them allow for the extraction of the information that has been camouflaged in the chaotic emission. This building block represents a key tool to implement a high degree of privacy directly on the physical layer. We realize a proof-of-concept communication at a wavelength of 5.7 μm with a message encryption at a bit rate of 0.5 Mbit/s. Our demonstration of private free-space communication between a transmitter and receiver opens strategies for physical encryption and decryption of a digital message.
由于对电磁干扰具有免疫力，中红外自由空间光通信在高速通信方面具有巨大潜力。然而，防止窃听者的数据安全是私人自由空间通信面临的障碍之一。在此，我们表明，两个在混沌状态下运行的单向耦合量子级联激光器及其之间的同步，能够提取隐藏在混沌发射中的信息。这一构建模块是直接在物理层实现高度隐私性的关键工具。我们在5.7μm波长处实现了概念验证通信，消息加密比特率为0.5Mbit/s。我们在发射器和接收器之间进行的私人自由空间通信演示，为数字消息的物理加密和解密开辟了策略。
