Generating an ultra-stable dual frequency comb with a microresonator

Le résumé fourni par la source

Frequency combs are coherent light sources comprising multiple evenly spaced emission lines, allowing coherent sampling over a broad part of the optical spectrum. The addition of a second frequency comb results in a dual comb. Now, one comb can be used as a local oscillator frequency reference for the other, allowing spectroscopic measurement to take place at radio-frequencies. An important figure of merit is the relative frequency stability of the two combs. In this work we demonstrate efficient generation of ultrastable dual combs using an electro-optic whispering gallery mode resonator, with a relative comb line stability of order 1 mHz.

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