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Frequency dispersion of electro-optical properties over a wide range by means of time-response analysis
Mustapha Abarkan1, Jean Paul Salvestrini, Michel Aillerie
1Laboratoire Matériaux Optiques, Photonique et Systèmes, Formation de Recherche en Evolution Centre Nationale de la Recherche Scientifique 2304, Université de Metz et Supélec, 2, rue E. Belin, 57070 Metz, France.
Abstract:
We show that a Z-transform-based time-response analysis of the electro-optical response of a crystal to a step voltage with a short rise time allows one to obtain the dispersion of the electro-optical coefficients over a wide frequency range. We describe the method employed and present the results obtained for the main electroptic coefficients (r22, r61, and rc) of a standard LiNbO3 crystal. We also show that this method is able to provide even small values of the electro-optic coefficient as well as the dispersion within a wide frequency range, which is limited only by the rise time of the step voltage.