Topic
Four-wave mixing
About: Four-wave mixing is a research topic. Over the lifetime, 7530 publications have been published within this topic receiving 112702 citations.
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TL;DR: In this article, nondegenerate four-wave mixing (FWM) between waves belonging to different spatial modes of a 5 km-long few-mode fiber (FMF) has been experimentally demonstrated.
Abstract: We experimentally demonstrate nondegenerate four-wave mixing (FWM) between waves belonging to different spatial modes of a 5-km-long few-mode fiber (FMF). Of the three inter-modal FWM (IM-FWM) processes possible, two have been experimentally observed. These IM-FWM processes are found to be phase-matched over very large frequency separations of several Terahertz between the waves. In contrast to FWM in single-mode fibers that require operating near the zero-dispersion wavelength to achieve phase matching, IM-FWM in a FMF can be fully phase matched in the presence of large chromatic dispersion in each spatial mode.
161 citations
TL;DR: In this paper, a polarization-independent frequency conversion over a 1-THz range by fiber four-wave mixing is demonstrated using a polarization diversity technique, where the power of the converted light varies less than 0.2 dB.
Abstract: Polarization-independent frequency conversion over a 1-THz range by fiber four-wave mixing is demonstrated using a polarization diversity technique. The power of the converted light varies less than 0.2 dB. Bit-error-rate (BER) performance of frequency-shift-keying (FSK) direct detection at 622 Mb/s confirms the feasibility of the technique. >
160 citations
TL;DR: In this paper, a detailed analysis of the modal properties, dispersive behavior, and nonlinear mode coupling in graded-index multimode fibers (GIMFs), and a simplified form of a generalized nonlinear Schrodinger equation, which can be used to explore the rich nonlinear dynamics related to the propagation and interaction of light pulses in GIMFs, is presented.
Abstract: We present a detailed analysis of the modal properties, dispersive behavior, and nonlinear mode coupling in graded-index multimode fibers (GIMFs), and lay out a simplified form of a generalized nonlinear Schrodinger equation, which can be used to explore the rich nonlinear dynamics related to the propagation and interaction of light pulses in GIMFs in a tractable manner. We also briefly discuss an application of the presented formalism in the study of four-wave mixing in these fibers. While the reported formalism is fairly general, our presentation is mainly targeted at device applications in which short segments of GIMFs are used.
158 citations
TL;DR: This work reports what it believes to be the first experimental demonstration of nondegenerate four-wave mixing in a microstructure fiber and compares the experimental gain results with those predicted by theory and explores the effects of Raman shift and (or) amplification and cascaded nonlinear mixing.
Abstract: We report what we believe to be the first experimental demonstration of nondegenerate four-wave mixing in a microstructure fiber. The effect of the χ3 nonlinearity is enhanced in such a fiber because of the small core area, and we achieve phase matching by operating near the zero-dispersion wavelength ≃750 nm. We have observed parametric gains of more than 13 dB in 6.1-m-long fiber with a pump peak power of only 6 W. We compare our experimental gain results with those predicted by theory and explore the effects of Raman shift and (or) amplification and cascaded nonlinear mixing.
157 citations
TL;DR: The backward phase conjugation (OPC) is a special relationship between two coherent optical beams propagating in opposite directions with reversed wave front and identical transverse amplitude distributions as mentioned in this paper.
157 citations