title: All-fiber acousto-optic frequency shifter.
abstract: An all-fiber-optic frequency shifter is demonstrated that uses mode coupling between the LP(01) and LP(11) modes by a traveling acoustic flexural wave guided along the optical fiber. The input and output leads of this frequency shifter are single-mode fibers. Unity mode-conversion efficiency for cw operation is achieved at 8-MHz frequency shift with about 0.25 W of electrical input power. Carrier and image sideband suppression of 15 and 35 dB, respectively, are demonstrated.
authors.affiliation: Edward L. Ginzton Laboratory, W. W. Hansen Laboratories of Physics, Stanford University, Stanford, California 94305, USA.
authors.forename: B Y
authors.initials: BY
authors.lastname: Kim
authors.forename: J N
authors.initials: JN
authors.lastname: Blake
authors.forename: H E
authors.initials: HE
authors.lastname: Engan
authors.forename: H J
authors.initials: HJ
authors.lastname: Shaw