Novel integrated acousto-optic and electro-optic heterodyning device in a LiNbO3 waveguide

Abstract

A wideband integrated optic heterodyning device that utilizes simultaneously a wideband acousto-optic (AO) Bragg cell and a wide-angle electro-optic (EO) Bragg grating lens has been realized, for the first time, in a Y-cut LiNbO3 waveguide 1×8×20 mm3 in size. The device has demonstrated a bandwidth of 240 MHz centered at 350 MHz and a single-tone instantaneous and two-tone third-order spurious-free dynamic ranges of 44.6 and 36.0 dB, respectively, at the optical wavelength of 0.6328 μm. The device suggests a new and simple architecture for wideband integrated optic interferometric rf spectrum analyzers.