Abstract
In this paper, we quantitatively analyzed the tradeoff between energy per bit for switching and
modulation bandwidth of classical electrooptic modulators. A formally simple energy-bandwidth limit
(10) is derived for electrooptic modulators based on intracavity index
modulation. To overcome this limit, we propose a dual cavity modulator device which uses a coupling modulation scheme
operating at high bandwidth (>200 GHz) not limited by cavity photon lifetime and simultaneously features an
ultralow switching energy of 0.26 aJ, representing over three orders of magnitude energy consumption reduction
compared to state-of-the-art electrooptic modulators.
© 2013 IEEE
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