We demonstrate electro‐optic frequency shifting of laser light (&lgr;=723 nm), electronically tunable through more than ± 1 MHz, in a LiNbO3: Ti single‐mode stripe waveguide, using polarization conversion at a traveling index grating, driven by two phase‐quadrature voltages of ∼27 V at the offset frequency. The optical carrier and undesired sidebands are suppressed better than 30 dB by polarizers, conversion efficiency ≥70%, device length 4.5 mm, optical bandwidth ∼1 nm; direct butt coupling to fibers is possible.