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 paper, a planar rib waveguide with nonlinearity up to 2080 W-1ldr km-1 and losses as low as 0.05 dB/cm has been developed to enable high-speed all-optical signal processing in compact, low-loss optical devices through the use of ultra fast Kerr effect.
Abstract: Ultrahigh nonlinear tapered fiber and planar rib Chalcogenide waveguides have been developed to enable highspeed all-optical signal processing in compact, low-loss optical devices through the use of four-wave mixing (FWM) and cross-phase modulation (XPM) via the ultra fast Kerr effect. Tapering a commercial As2Se3 fiber is shown to reduce its effective core area and enhance the Kerr nonlinearity thereby enabling XPM wavelength conversion of a 40 Gb/s signal in a shorter 16-cm length device that allows a broader wavelength tuning range due to its smaller net chromatic dispersion. Progress toward photonic chip-scale devices is shown by fabricating As2S3 planar rib waveguides exhibiting nonlinearity up to 2080 W-1ldr km-1 and losses as low as 0.05 dB/cm. The material's high refractive index, ensuring more robust confinement of the optical mode, permits a more compact serpentine-shaped rib waveguide of 22.5 cm length on a 7-cm- size chip, which is successfully applied to broadband wavelength conversion of 40-80 Gb/s signals by XPM. A shorter 5-cm length planar waveguide proves most effective for all-optical time-division demultiplexing of a 160 Gb/s signal by FWM and analysis shows its length is near optimum for maximizing FWM in consideration of its dispersion and loss.
149 citations
TL;DR: In this article, a nonlinear optical process may enhance pulse compression and storage, and that information about the nonlinear process itself may be stored coherently, and a pulse storage scheme in hot atomic rubidium vapour, in which a four-wave mixing normal mode is stored using a double configuration.
Abstract: Digital signal processing, holography, and quantum and classical information processing rely heavily upon recording the amplitude and phase of coherent optical signals. One method for achieving coherent information storage makes use of electromagnetically induced transparency. Storage is achieved by compressing the optical pulse using the steep dispersion of the electromagnetically induced transparency medium and then mapping the electric field to local atomic quantum-state superpositions. Here we show that nonlinear optical processes may enhance pulse compression and storage, and that information about the nonlinear process itself may be stored coherently. We report on a pulse storage scheme in hot atomic rubidium vapour, in which a four-wave-mixing normal mode is stored using a double- configuration. The entire (broadened) waveform of the input signal is recovered after several hundred microseconds (1/e time of about 120 s), as well as a new optical mode (idler) generated from the four-wave-mixing process.
149 citations
TL;DR: In this article, a purely optical demultiplexing technique for high-speed time-division multiplexed data is proposed and demonstrated using optical fiber nonlinearity induced four-wave mixing with a data signal and a probe signal located at different wavelengths.
Abstract: A novel, purely optical technique for demultiplexing high-speed time-division multiplexed data is proposed and demonstrated. The technique uses optical fibre nonlinearity induced four-wave mixing with a data signal and a probe signal located at different wavelengths. Using only semiconductor laser light sources, 1:4 demultiplexing of 20 ps long, subpicojoule, 2/sup 15/-1 RZ pulses at a data rate of 16 Gbit/s with less than 1 dB penalty is demonstrated.
148 citations
TL;DR: Efficient, low power, continuous-wave four-wave mixing in the C-band is demonstrated using a high index doped silica glass micro ring resonator having a Q-factor of 1.2 million, and theoretically that the characteristic low dispersion enables phase-matching over a tuning range > 160 nm.
Abstract: We demonstrate efficient, low power, continuous-wave four-wave mixing in the C-band, using a high index doped silica glass micro ring resonator having a Q-factor of 1.2 million. A record high conversion efficiency for this kind of device is achieved over a bandwidth of 20nm. We show theoretically that the characteristic low dispersion enables phase-matching over a tuning range > 160nm.
147 citations
TL;DR: In this article, the linear-eddy turbulent mixing model is applied to two mixing configurations in homogeneous flow: a scalar mixing layer and a two-line-source configuration, and the adjustment of a single model parameter related to the turbulence integral scale yields computed results in good agreement with a variety of measured quantities.
Abstract: The linear-eddy turbulent mixing model, formulated to capture the distinct influences of turbulent convection and molecular transport on turbulent mixing of diffusive scalars, is applied to two mixing configurations in homogeneous flow: a scalar mixing layer and a two-line-source configuration. Finite-rate second-order chemical reactions are considered, as well as the limits of fast reaction and frozen flow. Computed results are compared to measurements in a reacting-scalar mixing layer and in a two-line-source configuration involving passive-scalar mixing. For each configuration, the adjustment of a single model parameter related to the turbulence integral scale yields computed results in good agreement with a variety of measured quantities. The results are interpreted with reference to a simpler model, based solely on large-scale flapping effects, that reproduces many qualitative trends. For three-stream mixing with finite-rate chemistry, a novel dependence of the reactant correlation coefficient on the chemical reaction rate is predicted.
147 citations