We have implemented highly stable and tunable frequency references usingoptical high finesse cavities which incorporate a piezo actuator. As piezomaterial we used ceramic PZT, crystalline quartz, or PZN-PT single crystals.Lasers locked to these cavities show a relative frequency stability better than1 x 10^{-14}, which is most likely not limited by the piezo actuators. Thepiezo cavities can be electrically tuned over more than one free spectral range(> 1.5 GHz) with only a minor decrease in frequency stability. Furthermore, wepresent a novel cavity design, where the piezo actuator is prestressed betweenthe cavity spacer components. This design features a hermetically sealableintra cavity volume suitable for, e.g., cavity enhanced spectroscopy.
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机译：我们已经使用了光学高精密腔体并结合了压电执行器，从而实现了高度稳定和可调谐的频率参考。作为压电材料，我们使用了陶瓷PZT，晶体石英或PZN-PT单晶。固定在这些腔上的激光的相对频率稳定性优于1 x 10 ^ {-14}，这很可能不受压电驱动器的限制。压电腔可以在一个以上的自由频谱范围（> 1.5 GHz）上进行电调谐，而频率稳定性只有很小的降低。此外，我们提出了一种新颖的腔体设计，其中，压电促动器在腔体垫片组件之间预加应力。这种设计的特点是可密封的腔内容积适用于例如腔增强光谱学。
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