3.8 Article

Mid-infrared free-space cryptosystem

Journal

IEICE NONLINEAR THEORY AND ITS APPLICATIONS
Volume 13, Issue 1, Pages 44-52

Publisher

IEICE-INST ELECTRONICS INFORMATION COMMUNICATION ENGINEERS
DOI: 10.1587/nolta.13.44

Keywords

quantum cascade laser; free-space optics; private communication; non-linear dynamics; semiconductor laser; mid-infrared photonics

Funding

  1. French Defense Agency (DGA)
  2. French ANR program [ANR-17-ASMA-0006]
  3. European Office of Aerospace Research and Development [FA9550-18-1-7001]
  4. Agence Nationale de la Recherche (ANR) [ANR-17-ASMA-0006] Funding Source: Agence Nationale de la Recherche (ANR)

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Communication privacy is crucial for expanding networks, and many remote areas lack broadband access due to difficulties or costs in deploying current systems. This work demonstrates a mid-infrared free-space cryptosystem based on chaos synchronization between two quantum cascade lasers, with optimal amplitude conditions for privacy and deciphering. This paves the way for widespread adoption of quantum cascade lasers in future communication systems.
Communication privacy is one of the key requirements for always expanding networks. Furthermore, fibre systems are becoming saturated and many remote areas do not have access to broadband connection because current systems are too difficult or expensive to deploy. In this work, we experimentally demonstrate a mid-infrared free-space cryptosystem that is based on chaos synchronization between two quantum cascade lasers. Optimal amplitude conditions to ensure both privacy and acceptable deciphering are described, paving the way towards a wide adoption of quantum cascade lasers for future communication systems.

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