Abstract

The broadband dispersion compensator plays an important role for the light transmission of ultrashort pulses. Inspired by the requirement for a compact, tunable dispersion compensator operating in the mid-infrared spectral range, we proposed a compact dispersion compensator with hybrid silicon and lithium niobate nanowire configuration and investigated its group-velocity dispersion characteristics numerically. The results show that the tailored hybrid waveguide can exhibit group velocity dispersion of up to 105 ps2·km−1 in the 2~5 μm spectral range. In addition, the dispersion can be tuned via the applied bias field by the aid of the excellent electro-optical performance of the host material, lithium niobate. This work may provide some guidelines for designing broadband dispersion compensators and make an inroad for miniaturized functional optoelectronic devices.

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