We demonstrate a device that integrates a III–V semiconductor saturable absorber mirror with a graphene electro-optic modulator, which provides a monolithic solution to modelocking and noise suppression in a frequency comb. The device offers a pure loss modulation bandwidth exceeding 5 MHz and only requires a low voltage driver. This hybrid device provides not only compactness and simplicity in laser cavity design, but also small insertion loss, compared to the previous metallic-mirror-based modulators. We believe this work paves the way to portable and fieldable phase-coherent frequency combs.
Lee, Chien-Chung; Hayashi, Yusuke; Silverman, Kevin; Mirin, Richard; Feldman, Ari; Harvey, Todd; and Schibli, Thomas, "Monolithic device for modelocking and stabilization of frequency combs" (2015). University Libraries Open Access Fund Supported Publications. 23.