title: Acousto-optic wide band optical low-frequency shifter.
abstract: A wide bandwidth tunable optical low-frequency shifter is presented in this work. It is based on two acousto-optic devices operating in tandem. The relevant parameters of the specific configurations of acousto-optic interactions in paratellurite material are detailed. Results from numerical computations leading to the practical design parameters are given. The low-frequency shifter has been experimentally tested at a visible wavelength λ₀=514  nm and a high efficiency (>60%) has been measured. The tuning capability of the optical shifter covers a bandwidth Δf=26  MHz.
authors: Anthony
authors: A
authors: Dieulangard
authors: Jean-Claude
authors: JC
authors: Kastelik
authors: Samuel
authors: S
authors: Dupont
authors: Joseph
authors: J
authors: Gazalet