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Vorträge und Posterpräsentationen (ohne Tagungsband-Eintrag):

F. Bammer, D. Schuöcker, R. Petkovsek, J. Mozina:
"Dual mode single crystal photo-elastic modulator and possible applications";
Poster: 10th School on Acousto-Optics and Applications, Danzig; 12.05.2008 - 15.05.2008.



Kurzfassung deutsch:
A new kind of an acousto-optical device based on a LiTaO3-crystal is presented. LiTaO3 is piezoelectric, hence when a harmonic voltage with a proper frequency is applied to the crystal, it will start to oscillate resonantly in a mechanical eigenmode. Due to photo-elasticity an artificial modulated birefringence is induced by this oscillation. By using a properly adjusted polarizer and analyzer the transmission of trough-going polarized light can be modulated. By simultaneous excitation of two modes an advanced optical response can be achieved. For the applications presented here the first shear eigenmode must have exactly three times the frequency of the first longitudinal eigenmode.

Kurzfassung englisch:
A new kind of an acousto-optical device based on a LiTaO3-crystal is presented. LiTaO3 is piezoelectric, hence when a harmonic voltage with a proper frequency is applied to the crystal, it will start to oscillate resonantly in a mechanical eigenmode. Due to photo-elasticity an artificial modulated birefringence is induced by this oscillation. By using a properly adjusted polarizer and analyzer the transmission of trough-going polarized light can be modulated. By simultaneous excitation of two modes an advanced optical response can be achieved. For the applications presented here the first shear eigenmode must have exactly three times the frequency of the first longitudinal eigenmode.

Schlagworte:
Photo-elastic modulators, LiTaO3

Erstellt aus der Publikationsdatenbank der Technischen Universitšt Wien.