title: Wavelength-selective orbital-angular-momentum beam generation using MEMS tunable Fabry-Perot filter.
abstract: We demonstrate an on-chip device capable of wavelength-selective generation of vortex beams, which is realized by a spiral phase plate integrated onto a microelectromechanical system (MEMS) tunable filter. This vortex MEMS filter, being capable of functioning simultaneously in both wavelength and orbital-angular-momentum (OAM) domains at the 1550 nm wavelength regime, is considered as a compact, robust, and cost-effective solution for simultaneous OAM- and wavelength-division multiplexed optical communications. The experimental OAM spectra for azimuthal orders 1, 2, and 3 show an OAM state purity >92% across a wavelength range of more than 30 nm.
authors.forename: Sujoy
authors.initials: S
authors.lastname: Paul
authors.forename: Vladimir S
authors.initials: VS
authors.lastname: Lyubopytov
authors.forename: Martin F
authors.initials: MF
authors.lastname: Schumann
authors.forename: Julijan
authors.initials: J
authors.lastname: Cesar
authors.forename: Arkadi
authors.initials: A
authors.lastname: Chipouline
authors.forename: Martin
authors.initials: M
authors.lastname: Wegener
authors.forename: Franko
authors.initials: F
authors.lastname: Küppers