Abstract

We report the observation of a stable and broadband optical frequency comb in a high-Q fiber Fabry-Perot resonator operating in normal dispersion regime through a continuous wave pumping scheme. We evidence that it arises from an unexpected phase-locking phenomenon induced by a combination of the Kerr and Brillouin effects. This led to the generation of frequency combs, spanning over 10 THz, characterized by a 10.53 GHz line-to-line spacing within a cavity featuring a 1.176 GHz free spectral range.

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