title: Multipass laser cavity for efficient transverse illumination of an elongated volume.
abstract: A multipass laser cavity is presented which can be used to illuminate an elongated volume from a transverse direction. The illuminated volume can also have a very large transverse cross section. Convenient access to the illuminated volume is granted. The multipass cavity is very robust against misalignment, and no active stabilization is needed. The scheme is suitable for example in beam experiments, where the beam path must not be blocked by a laser mirror, or if the illuminated volume must be very large. This cavity was used for the muonic-hydrogen experiment in which 6 μm laser light illuminated a volume of 7 × 25 × 176 mm3, using mirrors that are only 12 mm in height. We present our measurement of the intensity distribution inside the multipass cavity and show that this is in good agreement with our simulation.
authors.forename: Jan
authors.initials: J
authors.lastname: Vogelsang
authors.forename: Marc
authors.initials: M
authors.lastname: Diepold
authors.forename: Aldo
authors.initials: A
authors.lastname: Antognini
authors.forename: Andreas
authors.initials: A
authors.lastname: Dax
authors.forename: Johannes
authors.initials: J
authors.lastname: Götzfried
authors.forename: Theodor W
authors.initials: TW
authors.lastname: Hänsch
authors.forename: Franz
authors.initials: F
authors.lastname: Kottmann
authors.forename: Julian J
authors.initials: JJ
authors.lastname: Krauth
authors.forename: Yi-Wei
authors.initials: YW
authors.lastname: Liu
authors.forename: Tobias
authors.initials: T
authors.lastname: Nebel
authors.forename: Francois
authors.initials: F
authors.lastname: Nez
authors.forename: Karsten
authors.initials: K
authors.lastname: Schuhmann
authors.forename: David
authors.initials: D
authors.lastname: Taqqu
authors.forename: Randolf
authors.initials: R
authors.lastname: Pohl