20 February 2017 Nonlinear mode conversion for intermodal four-wave mixing Stokes and anti-Stokes in a multimode fiber
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Abstract
In this paper we study, both experimentally and by theory, a new nonlinear dynamic in multimode optical fiber where intermodal four-wave mixing (IM-FWM) and Kerr-induced nonlinear mode coupling (NLC) are strongly interacting. We show that presence of phase-matched IM-FWM and strong nonlinear mode coupling results in an unprecedented saturable mode conversion in the FWM anti-Stokes beam. We investigate the evolution of modal conversion as a function of fiber length and show that the result of this novel nonlinear dynamic is a controllable, length independent mode conversion. Our theoretical calculations suggest that the converted anti-Stokes beam can also be amplified via IM-FWM. We observe a mode conversion with an efficiency as high as 90 percent.
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Hamed Pourbeyram, Hamed Pourbeyram, Arash Mafi, Arash Mafi, } "Nonlinear mode conversion for intermodal four-wave mixing Stokes and anti-Stokes in a multimode fiber", Proc. SPIE 10088, Nonlinear Frequency Generation and Conversion: Materials and Devices XVI, 1008817 (20 February 2017); doi: 10.1117/12.2252729; https://doi.org/10.1117/12.2252729
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