Citation:Alexander, J. K., Caro, L., Dernaika, M., Duggan, S. P., Yang, H., Chandran, S., Martin, E. P., Ruth, A. A., Anandarajah, P. M. and Peters, F. H. (2020) 'Integrated dual optical frequency comb source', Optics Express, 28(11), pp. 16900-16906. doi: 10.1364/OE.384706
A monolithically integrated dual-channel optical frequency comb source is demonstrated in this paper. Three lasers are integrated on a single chip using a regrowth-free fabrication process in a master-slave-slave configuration. The master laser’s power is split equally using a 1x2 multimode interference coupler and injection locks the two slave lasers. The slave lasers are gain-switched to produce dual optical frequency combs at 4.1 GHz and 5 GHz. To the best of our knowledge, this is the first demonstration of a dual optical frequency comb source with all light sources monolithically integrated in a photonic integrated circuit (PIC).
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