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Polarization chaos and random bit generation in nonlinear fiber optics induced by a time-delayed counter-propagating feedback loop

Polarization chaos and random bit generation in nonlinear fiber optics induced by a time-delayed counter-propagating feedback loop
Polarization chaos and random bit generation in nonlinear fiber optics induced by a time-delayed counter-propagating feedback loop

In this manuscript, we experimentally and numerically investigate the chaotic dynamics of the state-of-polarization in a nonlinear optical fiber due to the cross-interaction between an incident signal and its intense backward replica generated at the fiber-end through an amplified reflective delayed loop. Thanks to the cross-polarization interaction between the two-delayed counter-propagating waves, the output polarization exhibits fast temporal chaotic dynamics, which enable a powerful scrambling process with moving speeds up to 600-krad/s. The performance of this all-optical scrambler was then evaluated on a 10-Gbit/s On/Off Keying telecom signal achieving an error-free transmission. We also describe how these temporal and chaotic polarization fluctuations can be exploited as an all-optical random number generator. To this aim, a billion-bit sequence was experimentally generated and successfully confronted to the dieharder benchmarking statistic tools. Our experimental analysis are supported by numerical simulations based on the resolution of counter-propagating coupled nonlinear propagation equations that confirm the observed behaviors.

1094-4087
845-858
Morosi, J.
3a527f92-069b-4b8d-8ded-e1a46c6c5c1f
Berti, N.
bdeee4a9-041f-4ef9-abfe-1bb50a5b85b9
Akrout, A.
842831eb-b0e6-4d14-ad9d-8fcd21772a57
Picozzi, A.
450f9a66-d279-4e86-8833-28b141264e38
Guasoni, M.
5aa684b2-643e-4598-93d6-bc633870c99a
Fatome, J.
5b84ab77-5c51-46e3-a116-581511c76f22
Morosi, J.
3a527f92-069b-4b8d-8ded-e1a46c6c5c1f
Berti, N.
bdeee4a9-041f-4ef9-abfe-1bb50a5b85b9
Akrout, A.
842831eb-b0e6-4d14-ad9d-8fcd21772a57
Picozzi, A.
450f9a66-d279-4e86-8833-28b141264e38
Guasoni, M.
5aa684b2-643e-4598-93d6-bc633870c99a
Fatome, J.
5b84ab77-5c51-46e3-a116-581511c76f22

Morosi, J., Berti, N., Akrout, A., Picozzi, A., Guasoni, M. and Fatome, J. (2018) Polarization chaos and random bit generation in nonlinear fiber optics induced by a time-delayed counter-propagating feedback loop Optics Express, 26, (2), pp. 845-858. (doi:10.1364/OE.26.000845).

Record type: Article

Abstract

In this manuscript, we experimentally and numerically investigate the chaotic dynamics of the state-of-polarization in a nonlinear optical fiber due to the cross-interaction between an incident signal and its intense backward replica generated at the fiber-end through an amplified reflective delayed loop. Thanks to the cross-polarization interaction between the two-delayed counter-propagating waves, the output polarization exhibits fast temporal chaotic dynamics, which enable a powerful scrambling process with moving speeds up to 600-krad/s. The performance of this all-optical scrambler was then evaluated on a 10-Gbit/s On/Off Keying telecom signal achieving an error-free transmission. We also describe how these temporal and chaotic polarization fluctuations can be exploited as an all-optical random number generator. To this aim, a billion-bit sequence was experimentally generated and successfully confronted to the dieharder benchmarking statistic tools. Our experimental analysis are supported by numerical simulations based on the resolution of counter-propagating coupled nonlinear propagation equations that confirm the observed behaviors.

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More information

Accepted/In Press date: 21 December 2017
e-pub ahead of print date: 9 January 2018
Published date: 22 January 2018

Identifiers

Local EPrints ID: 417603
URI: https://eprints.soton.ac.uk/id/eprint/417603
ISSN: 1094-4087
PURE UUID: f65c4a13-24e5-4a84-99a8-b850b1ef34a6

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Date deposited: 07 Feb 2018 17:30
Last modified: 13 Feb 2018 17:30

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Contributors

Author: J. Morosi
Author: N. Berti
Author: A. Akrout
Author: A. Picozzi
Author: M. Guasoni
Author: J. Fatome

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