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A quasi-phase-matching method where the modulation has a sawtooth profile and the phase-mismatch is almost fully corrected is suggested. Schemes for implementing sawtooth grating-assisted-phase-matching in low-order as well as high-order harmonic generation are proposed.
We show that the giant Kerr nonlinearity in the regime of electromagnetically induced transparency in vapor can give rise to the formation of Thirring-type spatial solitons, which are supported solely by cross-phase modulation.
We suggest a method for obtaining phase-matching of harmonic generation processes in homogeneous isotropic materials. The intensity of the pump beam is modulated along the direction of propagation giving rise to QPM-like signal generation.
We report a modulator in which a polysilicon-oxide-silicon capacitor forms a ridge waveguide to achieve unprecedented performance in silicon: 2.5 GHz small-signal bandwidth and a driver-limited extinction ratio of 5 dB at 1 gigabit per second.
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