title: Active feedback scheme for minimization of helicity-dependent instrumental asymmetries.
abstract: A method for the active feedback reduction of optical instrumental intensity asymmetries is presented. It is based on the fast chopping of two spatially separated beams of light with orthogonal linear polarizations that are recombined and passed through a quarter-wave plate to yield a single beam with rapidly flipping helicity. Active electro-optic feedback has been successfully employed to maintain this asymmetry below 10(-5).
authors.affiliation: Behlen Laboratory of Physics, University of Nebraska, Lincoln, Nebraska 68588, USA. ifayam@gmail.com
authors.forename: M I
authors.initials: MI
authors.lastname: Fabrikant
authors.forename: K W
authors.initials: KW
authors.lastname: Trantham
authors.forename: V M
authors.initials: VM
authors.lastname: Andrianarijaona
authors.forename: T J
authors.initials: TJ
authors.lastname: Gay