Bloch oscillations in an array of curved optical waveguides

We propose to use periodically spaced, curved optical waveguides for observ ation of optical Bloch oscillations. The refractive index distribution in t his system is equivalent to the sum of a periodic term resulting from the e qual spacing of the waveguides and a linear ramp, created by the curvature. We demonstrate numerically that light propagation in this geometry exhibit s spatial Bloch oscillations with the period depending on the radius of the curvature and the wavelength.