Theoretical study of optical fiber Raman polarizers with counterpropagating beams

Year: 2011

Authors: Kozlov V.V., Nuño J., Ania-Castañón J.D., Wabnitz S.

Autors Affiliation: Department of Information Engineering, University of Brescia, Brescia 25123, Italy; Department of Physics, Saint Petersburg State University, Saint Petersburg 198504, Russian Federation; Instituto de Optica, Consejo Superior de Investigaciones Cientificas (CSIC), Madrid 28006, Spain

Abstract: The theory of two counter-propagating polarized beams interacting in a randomly birefringent fiber via the Kerr and Raman effects is developed and applied to the quantitative description of Raman polarizers in the undepleted regime. Here Raman polarizers, first reported by Martinelli [6], are understood as Raman amplifiers operating in the regime in which an initially weak unpolarized beam is converted into an amplified fully polarized beam towards the fiber output. Three parameters are selected for the characterization of a Raman polarizer: the degree of polarization of the outcoming beam, its state of polarization, and its gain. All of these parameters represent quantities that are averaged over all random polarization states of the initially unpolarized signal beam. The presented theory is computer friendly and applicable to virtually all practically relevant situations, including the case of co-propagating beams, and in particular to the undepleted as well as the depleted regimes of the Raman polarizer.


Volume: 29 (3)      Pages from: 341  to: 347

More Information: This work was carried out in the framework of the \”Scientific Research Project of Relevant National Interest\” (PRIN 2008) entitled \”Nonlinear cross-polarization interactions in photonic devices and systems\” (POLARIZON), and appeared also as a result of 2009 Italy-Spain integrated action \”Nonlinear Optical Systems and Devices\” (HI2008-0075). The wok of J. Nuno was supported in part by the Spanish Ministry of Science and Innovation through an FPI fellowship (TEC2008-05791)
KeyWords: Birefringent fibers; Counter-propagating beam; Counterpropagating; Degree of polarization; Polarized beams; Quantitative description; Raman amplifier; Random polarization state; Signal beams; State of polarization; Theoretical study; Three parameters, Fiber amplifiers; Fiber optics; Fibers; Light amplifiers; Optical fibers; Polarization; Raman scattering, Optical instruments
DOI: 10.1109/JLT.2010.2099644

Citations: 28
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