title: Generation of high-order optical vortices using directly machined spiral phase mirrors.
abstract: We report on the generation of high-order optical vortices by spiral phase mirrors (SPMs). The mirrors are produced by direct machining with a diamond tool and are shown to produce high-quality optical vortices with topological charges ranging from 1 to upwards of 100 at a wavelength of 532 nm. The direct machining technique is flexible and offers the promise of high-precision, large-diameter SPMs that are compatible with high optical powers.
authors.affiliation: Centre for Quantum Computation and Communication Technology, Department of Quantum Sciences, The Australian National University, Canberra, Australia.
authors.forename: Geoff
authors.initials: G
authors.lastname: Campbell
authors.forename: Boris
authors.initials: B
authors.lastname: Hage
authors.forename: Ben
authors.initials: B
authors.lastname: Buchler
authors.forename: Ping Koy
authors.initials: PK
authors.lastname: Lam