title: Polarization sensitive terahertz imaging: detection of birefringence and optical axis.
abstract: We present a practicable way to take advantage of the spectral information contained in a broadband terahertz pulse for the determination of birefringence and orientation of the optical axis in a glass fiber reinforced polymer with a single measurement. Our setup employs circularly polarized terahertz waves and a polarization-sensitive detector to measure both components of the electromagnetic field simultaneously. The anisotropic optical parameters are obtained from an analysis of the phase and frequency resolved components of the terahertz field. This method shows a high tolerance against the skew of the detection axes and is also independent of a reference measurement.
authors.affiliation: Recendt GmbH, Science Park 2, Altenberger Str. 69, 4040 Linz, Austria. stefan.katletz@recendt.at
authors.forename: Stefan
authors.initials: S
authors.lastname: Katletz
authors.forename: Michael
authors.initials: M
authors.lastname: Pfleger
authors.forename: Harald
authors.initials: H
authors.lastname: Pühringer
authors.forename: Martin
authors.initials: M
authors.lastname: Mikulics
authors.forename: Nico
authors.initials: N
authors.lastname: Vieweg
authors.forename: Ole
authors.initials: O
authors.lastname: Peters
authors.forename: Benedikt
authors.initials: B
authors.lastname: Scherger
authors.forename: Maik
authors.initials: M
authors.lastname: Scheller
authors.forename: Martin
authors.initials: M
authors.lastname: Koch
authors.forename: Karin
authors.initials: K
authors.lastname: Wiesauer
mesh_terms: D001718:Birefringence; D004867:Equipment Design; D019544:Equipment Failure Analysis; D012031:Refractometry / Q000295:instrumentation*; D055069:Terahertz Imaging / Q000295:instrumentation*