As a crucial quantum resource for computing and information processing, cluster state has attracted extensive attention due to its unique entanglement properties rich structures. In this work, we theoretically propose scheme generating four-mode entangled states based on cascaded four-wave mixing (FWM) process. The internal characteristics are studied by using the positivity under partial trans...

We report the first observation of continuous degenerate four-wave mixing (DFWM) with color centers in LiF. Using a new technique which permits subkilohertz resolution, we have also observed the nearly degenerate four-wave mixing (NDFWM) spectrum in the visible spectral region.

We present the first bit-error-rate characterization of silicon four-wave-mixing wavelength converters. Power penalties below 0.5 dB are demonstrated over a 20-nm EDFA-limited wavelength range at 10 Gb/s, while 40-Gb/s measurements yield a 2.4-dB power penalty. ©2008 Optical Society of America OCIS codes: (130.7405) Wavelength conversion devices; (190.4380) Nonlinear optics, four-wave mixing

Four-wave mixing and walk-off between two optical beams are investigated for focusing Kerr media. It is shown that four-wave mixing reinforces the self-focusing of mutually trapped waves by lowering their power threshold for collapse, only when their phase mismatch is small. On the contrary, walk-off inhibits the collapse by detrapping the beams, whose partial centroids experience nonlinear osc...

Limitations in the performance of coherent transmission systems employing digital back-propagation due to four-wave mixing impairments are reported for the first time. A significant performance constraint is identified, originating from four-wave mixing between signals and amplified spontaneous emission noise which induces a linear increase in the standard deviation of the received field with s...

The nonlinear coefficient and group velocity dispersion of a thulium-doped fiber near 2μm are evaluated via four-wave mixing. Nonlinearity of thulium-doped fiber can be used for the design of doped-fiber lasers in this spectral region. OCIS codes: (060.2270) Fiber characterization; (190.4380) Nonlinear optics, four-wave mixing

We experimentally demonstrate, for the first time, polarization-insensitive wavelength conversion of a 10 Gb/s NRZ-OOK data signal based on four-wave mixing in a silicon nanowire with bit-error rate measurements. OCIS codes: (190.4380) Nonlinear optics, four-wave mixing; (190.4390) Nonlinear optics, integrated optics; (230.7370) Waveguide; (130.7405) Wavelength conversion devices.

Modulational instability in a photorefractive medium is studied in the presence of two wave mixing. We then propose and derive a model for forward four wave mixing in the photorefractive medium and investigate the modulational instability induced by four wave mixing effects. By using the standard linear stability analysis the instability gain is obtained. In both the cases, the geometry is such...

Data transmission in optical systems and increased transmission distance capacity benefit by using optical amplification wavelength division multiplexing (WDM) technology. The combination of four waves (FWM) is a non-linear effect in the wavelength division multiplex (WDM), when more than two wavelengths of light in a fiber launch will occur. FWM amount depends on the channel, the channel spaci...