title: Multiplication of optical frequency shift by cascaded electro-optic traveling phase gratings operating above 10 GHz.
abstract: We propose and demonstrate an electro-optic (EO) multiplication of a frequency shift using 10 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 LiTaO₃ crystal. Frequency shifting of ±32.5 GHz with an efficiency of 60% is demonstrated using a 16.25 GHz modulation signal.
authors.affiliation: Division of Advanced Electronics and Optical Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan. hisatake@ee.es.osaka‐u.ac.jp
authors.forename: Shintaro
authors.initials: S
authors.lastname: Hisatake
authors.forename: Takaaki
authors.initials: T
authors.lastname: Konishi
authors.forename: Tadao
authors.initials: T
authors.lastname: Nagatsuma