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Vorträge und Posterpräsentationen (mit Tagungsband-Eintrag):

F. Bammer, B. Holzinger, T. Schumi:
"A single crystal photo-elastic modulator";
Vortrag: Photonics West 2007, San Jose, Kalifornien, USA; 22.01.2007 - 24.01.2007; in: "Proceedings of SPIE, Optical Components and Materials IV", S. Jiang, M. Digonnet (Hrg.); SPIE, 6469 (2007), ISSN: 0277-786x; S. 64690O-1 - 64690O-8.



Kurzfassung englisch:
We present theoretical and experimental data and possible applications of a photo-elastic-modulator (PEM) made of LiTaO3. The device with dimensions 13.2x7.1x5.5 mm in x-, y- and z-direction and electrodes on the zx-surfaces offers basic modulation frequencies at 199, 348 and 377 kHz corresponding to the longitudinal oscillations in x- and y-direction and to a yz-shear oscillation mode. The light travels along the optical axis. At the main resonance at 199 kHz the voltage amplitude to achieve a quarter wave retardation amplitude is only ~2.5V, a very low value due to the strong piezo-electric response and the low loss of LiTaO3. Hence when compared to a conventional photo-elastic modulator, which is made out of at least two components, the device is extremely compact, cheap and easy to operate, especially when placed in a feedback loop of an amplifier such that it operates on one fixed frequency

Schlagworte:
photo-elastic modulators, LiNbO3, LiTaO3, ellipsometry


Elektronische Version der Publikation:
http://publik.tuwien.ac.at/files/pub-mb_5759.pdf


Erstellt aus der Publikationsdatenbank der Technischen Universitšt Wien.