Generation of orthogonal codes with chaotic optical systems

D. Rontani (1, 2) , A. Locquet (2, 3) , M. Sciamanna (1, 2) , D. S Citrin (3, 2) , A. Uchida (4)

1 LMOPS - Laboratoire Matériaux Optiques, Photonique et Systèmes
2 Georgia Tech Lorraine [Metz]
3 School of Electrical and Computer Engineering [Atlanta]
4 Saitama University

We propose to use an electro-optic oscillator based on two Mach-Zehnder modulators in two different delayed feedback loops to generate two orthogonal chaotic spreading sequences (codes). We numerically demonstrate, for such codes, spectrally-efficient multiplexing and demultiplexing of two digital data streams at multi-Gb/s rates using chaos synchronization and covariance-based detection.

Domaines: Sciences de l'ingénieur [physics]

D. Rontani, A. Locquet, M. Sciamanna, D. S Citrin, A. Uchida. Generation of orthogonal codes with chaotic optical systems. Optics Letters, 2011, 36 (12), pp.2287-2289. ⟨10.1364/OL.36.002287⟩. ⟨hal-03079736⟩