The phenomenon of an undesirable nonlinear optical effects degrade the system performance. In optical wave–length division multiplexing (WDM) systems employing dispersion shifted fibers, the crosstalk due to four–wave mixing (FWM) is one of the dominating degradation nonlinear optical effects. Generally, FWM crosstalk suppression can be achieved by using unequally spaced channel allocation meth...

) soljačić mit physics annual 2006 hysical phenomenon of optical non-linearities describes the fact that high intensity light can modify the index of refraction of the material in which it propagates. Typically, this effect is fairly weak. However, the emerging field of nonlinear photonic crystals appears destined to change this situation dramatically, to the extent that even all-optical signal...

Coherent Rayleigh scattering (CRS) is studied in the high intensity regime, where the optical lattice potential approaches the thermal energy of the gas particles. We describe this optical-kinetic process using a 1-D Boltzmann equation with an arbitrary strong optical force and show that in this regime a line shape narrowing phenomenon is predicted and that the signal intensity saturates when c...

Optical responses in conventional metamaterials based on plasmonic metal nanostructures are inevitably accompanied by Joule losses, which obstruct practical applications by limiting resonance quality factors and compromising the efficiency of metamaterial devices. Here we experimentally demonstrate a fully-dielectric metamaterial that exhibits a 'trapped mode' resonance at optical frequencies, ...

Different optical characterization methods were applied to a series of microcrystalline silicon thin films, either as grown, textured, or subsequently polished, mirror-like. They reveal contributions of bulk and surface light scattering effects to the phenomenon of optical absorption enhancement. The enhanced light absorption in textured layers is mainly due to a longer optical path as a result...

We analyze the bifurcation mechanism responsible for the experimentally observed polarization selfmodulation ~PSM! in a vertical-cavity surface-emitting laser subject to optical feedback. We show that closed branches of time-periodic intensity solutions connecting distinct external-cavity modes ~ECMs! exhibit PSM. Along these bridges, the linearly polarized components of the optical field oscil...

Stochastic resonance SR is experimentally demonstrated in an atomic optical bistable system consisting of three-level atoms in -type configuration confined in an optical ring cavity. The optical bistable system with enhanced Kerr nonlinearity due to atomic coherence is driven by a periodic signal and a Gaussian white noise source with variable amplitude, and displays an improved output signal-t...

Nonlinear loss is the central problem in silicon devices that operate using nonlinear optical effects. Wavelength converters are one example of such devices, wherein high optical intensities required for nonlinear interactions cause two-photon absorption and severe free-carrier absorption. In this paper, we report the first demonstration of nonlinear photovoltaic effect in silicon wavelength co...

The laser-induced intermolecular force that exists between two or more particles in the presence of an electromagnetic field is commonly termed ‘optical binding’. Distinct from the single-particle forces that are at play in optical trapping at the molecular level, the phenomenon of optical binding is a manifestation of the coupling between optically induced dipole moments in neutral particles. ...

Vision towards establishing an all fiber configuration is the motivation behind this work. With the increasing need for high capacity communication systems, Broadband sources have become a necessity. Broadband optical sources are an integral part of multichannel high speed fiber optical communication networks based on all-optical WDM and OCDM. FWM (Four-Wave Mixing) effects and SC (Super Contin...