Article

Broadband polarization pulling using Raman amplification

Instituto de Telecomunicações, Campus de Santiago, Aveiro, Portugal.
Optics Express (Impact Factor: 3.49). 09/2011; 19(19):18707-12. DOI: 10.1364/OE.19.018707
Source: PubMed

ABSTRACT

The Raman gain based polarization pulling process in a copropagating scheme is investigated. We map the degree of polarization, the angle between the signal and pump output Stokes vectors, the mean signal gain and its standard deviation considering the entire Raman gain bandwidth. We show that, in the undepleted regime (signal input power ~ 1 μW), the degree of polarization is proportional to the pump power and changes with the signal wavelength, following the Raman gain shape. In the depleted regime (signal input power ≳ 1 mW), the highest values for the degree of polarization are no more observed for the highest pump powers. Indeed, we show that exists an optimum pump power leading to a maximum degree of polarization.

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Available from: Nelson J. Muga, Jul 15, 2014
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    • "This 3D space is defined through the three Stokes polarization parameters, and provides a versatile representation of light SOP [20]. It can also be used to mathematically represent the evolution of the SOPs of multiple waves into a fiber [21]. The operation principle of this PolDemux technique is based on the calculation of the signal samples Stokes parameters, which are used to compute a best fitting plane in the 3D Stokes space. "
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    ABSTRACT: A Stokes space based technique for digital polarization-dependent losses (PDL) monitoring and compensation is proposed. The channel PDL monitoring is carried out with a resolution of 0.15 dB by computing the mean point of the signal samples represented in the three-dimensional Stokes space. The presented compensation technique is based on rotations and translations of the signal samples in the Stokes space, and provides a PDL compensation up to 2.5 dB. Error vector magnitude results show a gain of about 3 dB (assuming a PDL value equal to 1.5 dB) to a Stokes space based polarization demultiplexing technique without PDL compensation.
    Full-text · Article · Jul 2013 · Journal of Lightwave Technology
  • Source
    • "This 3D space is defined through the three Stokes polarization parameters, and provides a versatile representation of light SOP [20]. It can also be used to mathematically represent the evolution of the SOPs of multiple waves into a fiber [21]. The operation principle of this PolDemux technique is based on the calculation of the signal samples Stokes parameters, which are used to compute a best fitting plane in the 3D Stokes space. "
    [Show abstract] [Hide abstract]
    ABSTRACT: A Stokes space based technique for digital polarization-dependent losses (PDL) monitoring and compensation is proposed. The channel PDL monitoring is carried out with a resolution of 0.15 dB by computing the mean point of the signal samples represented in the three-dimensional Stokes space. The presented compensation technique is based on rotations and translations of the signal samples in the Stokes space, and provides a PDL compensation up to 2.5 dB. Error vector magnitude results show a gain of about 3 dB (assuming a PDL value equal to 1.5 dB) to a Stokes space based polarization demultiplexing technique without PDL compensation.
    Full-text · Article · Jul 2013 · Journal of Lightwave Technology
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    ABSTRACT: We report on a theoretical study of activated polarization pulling and de-correlation of signal and pump states of polarization based on an advanced vector model of a fiber Raman amplifier accounting for random birefringence and two-scale fiber spinning. As a result, we have found that it is possible to provide de-correlation and simultaneously suppress PDG and PMD to 1.2 dB and 0.035 ps/km(1/2) respectively.
    No preview · Article · Nov 2011 · Optics Express
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