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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 23 — Nov. 5, 2012
  • pp: 25333–25344

Electro-optic phase chaos systems with an internal variable and a digital key

Romain Modeste Nguimdo and Pere Colet  »View Author Affiliations

Optics Express, Vol. 20, Issue 23, pp. 25333-25344 (2012)

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We consider an electro-optic phase chaos system with two feedback loops organized in a parallel configuration such that the dynamics of one of the loops remains internal. We show that this configuration intrinsically conceals in the transmitted variable the internal delay times, which are critical for decoding. The scheme also allows for the inclusion, in a very efficient way, of a digital key generated as a long pseudorandom binary sequence. A single digital key can operate both in the internal and transmitted variables leading to a large sensitivity of the synchronization to a key-mismatch. The combination of intrinsic delay time concealment and digital key selectivity provides the basis for a large enhancement of the confidentiality in chaos-based communications.

© 2012 OSA

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.5060) Fiber optics and optical communications : Phase modulation
(140.1540) Lasers and laser optics : Chaos
(250.0250) Optoelectronics : Optoelectronics
(250.4390) Optoelectronics : Nonlinear optics, integrated optics

ToC Category:

Original Manuscript: May 25, 2012
Revised Manuscript: July 13, 2012
Manuscript Accepted: August 12, 2012
Published: October 23, 2012

Romain Modeste Nguimdo and Pere Colet, "Electro-optic phase chaos systems with an internal variable and a digital key," Opt. Express 20, 25333-25344 (2012)

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