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Highly stable piezoelectrically tunable optical cavities

by: Katharina Möhle, Evgeny V. Kovalchuk, Klaus Döringshoff, Moritz Nagel, Achim Peters
Applied Physics B (7 Feb 2013), doi:10.1007/s00340-012-5322-0  Key: citeulike:12004804

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Abstract

We have implemented highly stable and tunable frequency references using optical high finesse cavities which incorporate a piezo actuator. As piezo material we used ceramic PZT, crystalline quartz, or PZN-PT single crystals. Lasers locked to these cavities show a relative frequency stability better than 1 x 10^-14, which is most likely not limited by the piezo actuators. The piezo cavities can be electrically tuned over more than one free spectral range (> 1.5 GHz) with only a minor decrease in frequency stability. Furthermore, we present a novel cavity design, where the piezo actuator is prestressed between the cavity spacer components. This design features a hermetically sealable intra cavity volume suitable for, e.g., cavity enhanced spectroscopy.


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