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We propose a high-frequency traveling-wave integrated electro-optic modulator based on a periodically poled LiNbO[sub 3]. The traveling velocity of the optical wave and the electrical wave velocity in the waveguide can be quasimatched due to the periodic structure. Using this design, a modulation frequency of several hundred GHz can be realized. Wide-bandwidth modulation is also achievable by employing an aperiodic domain grating. © 2001 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Studies the frequency tunneling of optical parametric generator in superlattice LiNbO[sub3] by electro-optic effect. Wavelength change achieved; Tuning rates; Phenomenon of dispersion in electro-optic tuning.

The electro-optic effect of periodically poled optical superlattice LiNbO[sub 3] (PPLN) was studied. Because of the periodic electro-optic (EO) coefficient, the reciprocal vector of the periodic structure can be used to compensate for the phase mismatch between the ordinary and extraordinary waves, which is similar to the nonlinear optical frequency conversion process. If the quasi-phase-matching condition is satisfied, polarization of a light propagated in PPLN can rotate linearly with the applied electric field, which shows that PPLN may be used as a precise spectral filter or an EO switch. © 2000 American Institute of Physics. [ABSTRACT FROM AUTHOR]