title: Note: Ultra-low birefringence dodecagonal vacuum glass cell.
abstract: We report on an ultra-low birefringence dodecagonal glass cell for ultra-high vacuum applications. The epoxy-bonded trapezoidal windows of the cell are made of SF57 glass, which exhibits a very low stress-induced birefringence. We characterize the birefringence Δn of each window with the cell under vacuum conditions, obtaining values around 10(-8). After baking the cell at 150 °C, we reach a pressure below 10(-10) mbar. In addition, each window is antireflection coated on both sides, which is highly desirable for quantum optics experiments and precision measurements.
authors.affiliation: Institut für Angewandte Physik, Universität Bonn, Wegelerstr. 8, D-53115 Bonn, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Brakhane
authors.affiliation: Institut für Angewandte Physik, Universität Bonn, Wegelerstr. 8, D-53115 Bonn, Germany.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Alt
authors.affiliation: Institut für Angewandte Physik, Universität Bonn, Wegelerstr. 8, D-53115 Bonn, Germany.
authors.forename: Dieter
authors.initials: D
authors.lastname: Meschede
authors.affiliation: Institut für Angewandte Physik, Universität Bonn, Wegelerstr. 8, D-53115 Bonn, Germany.
authors.forename: Carsten
authors.initials: C
authors.lastname: Robens
authors.affiliation: Institut für Angewandte Physik, Universität Bonn, Wegelerstr. 8, D-53115 Bonn, Germany.
authors.forename: Geol
authors.initials: G
authors.lastname: Moon
authors.affiliation: Institut für Angewandte Physik, Universität Bonn, Wegelerstr. 8, D-53115 Bonn, Germany.
authors.forename: Andrea
authors.initials: A
authors.lastname: Alberti