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: An octave-spanning supercontinuum is generated in a hydrogenated amorphous silicon core fiber when pumped in the mid-infrared regime, facilitated by the high material nonlinear figure of merit and the anomalous dispersion of the relatively small 1.7 μm diameter core fiber.
Abstract: An octave-spanning supercontinuum is generated in a hydrogenated amorphous silicon core fiber when pumped in the mid-infrared regime. The broadband wavelength conversion which extends from the edge of the telecommunications band into the mid-infrared (1.64-3.37µm) is generated by four-wave mixing (FWM) and subsequent pulse break-up, facilitated by the high material nonlinear figure of merit and the anomalous dispersion of the relatively small 1.7µm diameter core fiber. The FWM sidebands and corresponding supercontinuum can be tuned through the pump parameters, and show good agreement with the predicted phase-matching curves for the fiber.
39 citations
TL;DR: In this paper, the authors measured and analyzed four-wave mixing (FWM) efficiency and fluctuation along the actual dispersion-shifted fibers (DSF's) in the short, 1.1-km DSF, their results agreed with theory, and they also obtained zero-dispersion wavelength /spl lambda//sub 0/, zero-Dispersion slope dD/d/spl lambda/, and nonlinear refractive index n/sub 2/ simultaneously.
Abstract: We measured and analysed four-wave mixing (FWM) efficiency and fluctuation along the actual dispersion-shifted fibers (DSF's). In the short, 1.1-km DSF, our results agreed with theory, and we also obtained zero-dispersion wavelength /spl lambda//sub 0/, zero-dispersion slope dD/d/spl lambda/, and nonlinear refractive index n/sub 2/ simultaneously. In the long, 23-km, DSF, a high FWM efficiency was observed in the wide wavelength region, due to the longitudinal zero-dispersion wavelength distribution. The fluctuation range was about 3.5 nm and the maximum slope about 1.1 km/nm. >
39 citations
TL;DR: An experimental and theoretical analysis of four-wave mixing in nanosecond pulsed amplifiers based on double-clad ytterbium-doped fibers points out the critical parameters and possible tradeoffs for optimization.
Abstract: We present an experimental and theoretical analysis of four-wave mixing in nanosecond pulsed amplifiers based on double-clad ytterbium-doped fibers. This process leads to saturation of the amplified pulse energy at 1064 nm and to distortion of the spectral and temporal profiles. These behaviours are well described by a simple model considering both Raman and four-wave-mixing contributions. The role of seed laser polarization in birefringent fibers is also presented. These results point out the critical parameters and possible tradeoffs for optimization.
39 citations
TL;DR: In this paper, a set of nonlinear coupled equations describing four-wave mixing with matter waves was derived and solved analytically without utilizing the undepleted pump approximation, and the results were shown to be consistent with the Gross-Pitaevskii nonlinear Schrodinger equation.
Abstract: Starting from the Gross-Pitaevskii nonlinear Schrodinger equation, we derive a set of nonlinear coupled equations describing four-wave mixing with matter waves and solve them analytically without utilizing the undepleted pump approximation.
39 citations
Patent•
28 Jun 2006
TL;DR: In this article, a new blue extended super continuum light source is claimed, where pulses of partly coherent monochromatic "pump" radiation of essentially constant amplitude is 5 propagating through a microstructure fiber medium within a region of anomalous dispersion of the medium, provided the medium has a finite nonlinear coefficient of the index of refraction, the pump pulse is subject to a modulation instability.
Abstract: A new blue extended super continuum light source is claimed. When pulses of partly coherent monochromatic 'pump' radiation of essentially constant amplitude is 5 propagating through a microstructure fibre medium within a region of anomalous dispersion of the medium, then, provided the medium has a finite nonlinear coefficient of the index of refraction, the pump pulse is subject to a modulation instability. This instability results in the generation and exponential growth of sidebands, the two closest to the 'pump' frequency being the dominant ones. The 10 modulation frequency is proportional to the square root of the power in the carrier wave. In the time domain this leads to that the interaction between the medium and the radiation results in contraction of the width of the amplitude peaks, which results in formation of a train of narrow pulses with Tera Hertz repetition rate. 15 Phase match between red shifted Raman solitons generated by the pump pulse and energy shed by the pump pulse at all frequencies with a group velocity below the pump pulse group velocity will lead to the formation of Cherenkov radiation. The solitons or 'light bullets' will seed Cherenkov radiation in the near infrared, visible or at UV wavelengths depending on the actual fibre parameters. This extends the 20 generated super continuum light beyond the four wave mixing limit usually experienced when applying picoseconds or nanoseconds pump pulses.
39 citations