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Communication Dans Un Congrès Année : 2012

Light-by-light polarization control and stabilization in optical fibers for telecommunication applications

Julien Fatome

Résumé

With the advent of future transparent ultra high-bit rate capacity transmission networks, encoding the data would necessary involve all the physical parameters of a light beam, including multi-level in intensity, phase, polarization and even propagation modes. These complex optical fields will then naturally suffer from strong impairments imposed by linear and nonlinear propagation effects. Hence, developing new all-optical tools able to control or regenerate any properties of light has become of a crucial interest. In this work, we experimentally report that it is possible, using a unique segment of optical fiber, to all-optically manipulate and regenerate both the state of polarization (SOP) and intensity profile of a 40-Gbit/s Return-to-Zero telecommunication signal. Based on Kerr effect taking place in a single fiber, this dual polarization/intensity regenerator is based on a polarization attractor coupled to a Mamyshev reshaper. The polarization attraction is based on a four-wave mixing interaction between an arbitrary polarized signal wave and a counter-propagating pump with a fixed SOP. Whatever the state of polarization at the input of the device, the attraction process traps and stabilizes the output SOP to a unique state without any polarization dependent loss. On the other hand, the strong nonlinear regime of propagation occurring in the polarization attractor coupled to normal chromatic dispersion of its fiber provides a large intensity dependent spectral broadening. This phenomenon can then be used to reshape the intensity profile of the signal by means of the offset filtering method initially proposed by Mamyshev. This new class of device, enabling both all-optical polarization and intensity profile control constitutes a new kind of 3R signal processing, namely Repolarisation, Reamplification and Reshaping.
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Dates et versions

hal-00663847 , version 1 (27-01-2012)

Identifiants

  • HAL Id : hal-00663847 , version 1

Citer

Julien Fatome, Philippe Morin, Stéphane Pitois, Christophe Finot. Light-by-light polarization control and stabilization in optical fibers for telecommunication applications. In SPIE Photonics Europe, Brussels : Belgium (2012), Apr 2012, bruxelles, Belgium. ⟨hal-00663847⟩
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