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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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Journal ArticleDOI
TL;DR: When a Brillouin-shifted signal interacts with a two strong counter-propagating pump beams in a BAM active medium, a conjugate field will grow exponentially in time until it depletes the power of the pump beams and hence produce very high reflectivities as mentioned in this paper.
Abstract: When a Brillouin-shifted signal interacts with a two strong counterpropagating pump beams in a Brillouin active medium, a conjugate field will grow exponentially in time until it depletes the power of the pump beams and hence produce very high reflectivities (>10/sup 6/). The technique can be used to conjugate very weak signals ( >

103 citations

Journal ArticleDOI
TL;DR: In this paper, it was shown that four wave mixing, combined with short gain recovery time, causes QCL to operate in the self-frequency-modulated regime characterized by a constant power in time domain and stable coherent comb in the frequency domain.
Abstract: One salient characteristic of Quantum Cascade Laser (QCL) is its very shor gain recovery time that so far thwarted the attempts to achieve self-mode locking of the device into a train of single pulses. We show theoretically that four wave mixing, combined with the short gain recovery time causes QCL to operate in the self-frequency-modulated regime characterized by a constant power in time domain and stable coherent comb in the frequency domain.Coherent frequency comb may enable many potential applications of QCL in sensing and measurement.

102 citations

Journal ArticleDOI
TL;DR: In this paper, the authors developed a theoretical analysis of four-wave mixing used to generate photon pairs useful for quantum information processing, which applies to a single mode microstructured fiber pumped by an ultra-short coherent pulse in the normal dispersion region.
Abstract: We develop a theoretical analysis of four-wave mixing used to generate photon pairs useful for quantum information processing. The analysis applies to a single mode microstructured fibre pumped by an ultra-short coherent pulse in the normal dispersion region. Given the values of the optical propagation constant inside the fibre, we can estimate the created number of photon pairs per pulse, their central wavelength and their respective bandwidth. We use the experimental results from a picosecond source of correlated photon pairs using a micro-structured fibre to validate the model. The fibre is pumped in the normal dispersion regime at 708 nm and phase matching is satisfied for widely spaced parametric wavelengths of 586 and 894 nm. We measure the number of photons per pulse using a loss-independent coincidence scheme and compare the results with the theoretical expectation. We show a good agreement between the theoretical expectations and the experimental results for various fibre lengths and pump powers.

102 citations

Journal ArticleDOI
TL;DR: Etude par la methode de melange de quatre ondes a resolution temporelle realisee sur couches optiquement minces dans des conditions assurant une contribution negligeable de l'interaction exciton-exciton.
Abstract: The phase coherence and orientational relaxation of excitons resonantly excited in optically thin GaAs layers by a picosecond light pulse is explored by means of time-resolved degenerate-four-wave mixing. At low excitation intensities where contributions due to exciton-exciton scattering can be neglected, a rapid loss of the phase coherence as well as of the optical alignment of the excitonic dipoles within 7 ps is observed. This implies a weak coherent coupling between excitons and photons and raises the question about the range of validity of the commonly employed polariton concept for GaAs.

100 citations

Journal ArticleDOI
TL;DR: The novel fluctuation characteristics predicted for two-photon coherent-state radiation make possible high signal-to-noise ratio detection from a directional coupler that is very weakly linked to an information-bearing optical waveguide.
Abstract: The novel fluctuation characteristics predicted for two-photon coherent-state radiation make possible high signal-to-noise ratio detection from a directional coupler that is very weakly linked to an information-bearing optical waveguide.

100 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202371
2022174
2021158
2020209
2019217
2018246