A single crystal photo-elastic-modulator

F. Bammer; B. Holzinger; T. Schumi

doi:10.1117/12.699304

20 February 2007 A single crystal photo-elastic modulator

F. Bammer, B. Holzinger, T. Schumi

Proceedings Volume 6469, Optical Components and Materials IV; 64690O (2007) https://doi.org/10.1117/12.699304
Event: Integrated Optoelectronic Devices 2007, 2007, San Jose, California, United States

Abstract

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 ~2.5 V, 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.

Citation Download Citation

F. Bammer, B. Holzinger, and T. Schumi "A single crystal photo-elastic modulator", Proc. SPIE 6469, Optical Components and Materials IV, 64690O (20 February 2007); https://doi.org/10.1117/12.699304

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