A high resolution real-time temporal heterodyne interferometer for refractive index topography

Autor(en): Rickermann, F
Riehemann, S
vonBally, G
Breer, S
Buse, K
Stichwörter: CHARGE-TRANSPORT; DOPED LINBO3; interferometers; LIGHT; Optics; photorefractive materials
Erscheinungsdatum: 1997
Herausgeber: ELSEVIER SCIENCE BV
Journal: OPTICS COMMUNICATIONS
Volumen: 144
Ausgabe: 4-6
Startseite: 173
Seitenende: 179
Zusammenfassung: 
A Mach-Zehnder interferometer for two-dimensional refractive index topography is presented which utilizes the temporal heterodyne technique. High scanning rates and excellent phase resolutions are obtained using an image dissector camera and a lock-in amplifier. The setup is applied for investigation of the photorefractive effect. A macroscopic light pattern is recorded and thermally fixed in iron-doped LiNbO3. The evolution of the refractive index pattern during development by homogeneous illumination is observed with the interferometer. The measured refractive index profiles are in good agreement with the results of computer simulations. (C) 1997 Elsevier Science B.V.
ISSN: 00304018
DOI: 10.1016/S0030-4018(97)00398-2

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