We predict that stable mobile spatio-temporal solitons can exist in arrays ofperiodically curved optical waveguides. We find two-dimensional light bulletsin one-dimensional arrays with harmonic waveguide bending and three-dimensionalbullets in square lattices with helical waveguide bending using variationalformalism. Stability of the light bullet solutions is confirmed by the directnumerical simulations which show that the light bullets can freely move acrossthe curved arrays. This mobility property is a distinguishing characteristiccompared to previously considered discrete light bullets which were trapped toa specific lattice site. These results suggest new possibilities for flexiblespatio-temporal manipulation of optical pulses in photonic lattices.
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