Abstract

We propose and demonstrate an electro-optic (EO) multiplication of a frequency shift using $10\mathrm{GHz}$ order electrical signal. The principle is based on a successive Bragg diffraction from cascaded EO traveling phase gratings in a traveling wave EO phase modulator. We fabricate a shift frequency doubler using simple domain engineering processes in a ${\mathrm{LiTaO}}_3$ crystal. Frequency shifting of $\pm 32.5\mathrm{GHz}$ with an efficiency of 60% is demonstrated using a $16.25\mathrm{GHz}$ modulation signal.

© 2011 Optical Society of America

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