Abstract

While, microresonator-based frequency combs ("microcombs") have attracted significant attention in recent years [1-3], a major unsolved challenge is the f-2f self-referencing of this type of comb generator. Recent work has shown 2f-3f self-referencing with help of transfer lasers [4]. Here, we show a microcomb with 16.4 GHz mode spacing that is coherently broadened to an optical octave. In addition we show coherent frequency-doubling of light from 2222 nm to 1111 nm.

© 2015 IEEE

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