Abstract
Optical frequency combs are a unique tool for fundamental metrology and spectroscopy; they are also used in various applications. High-Q microcavities are promising for generating coherent frequency combs. An approach based on the pulling effect, which is well-known in radiophysics, is proposed. The use of this effect makes it possible to develop a compact, commercially available source of an optical comb and microwave radiation based on a compact distributed-feedback laser diode with a low output power of 6 mW and a microcavity based on magnesium fluoride with a Q factor of 109. Different generation modes of optical frequency combs, corresponding to different numbers of generated solitons at a pump power of 6 mW and a wavelength of 1550 nm, as well as spectrally pure microwave radiation at a frequency of 12.94 GHz, are demonstrated.
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ACKNOWLEDGMENTS
The study was performed using equipment of the Center for Collective Use of the All-Russian Research Institute of Optical and Physical Measurements (ckp.vniiofi.ru) and the Center for Collective Use “High-Resolution Imaging” of the Skoltekh (www.skoltech.ru).
Funding
The study was supported by the Russian Science Foundation (project no. 21-72-00132).
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Translated by Yu. Sin’kov
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Ruzhitskaya, D.D., Vorob’ev, K.A., Bulygin, F.V. et al. Compact Generator of an Optical Frequency Comb Based on Distributed-Feedback Laser Diode and High-Q Optical Microcavity. J. Exp. Theor. Phys. 136, 699–703 (2023). https://doi.org/10.1134/S1063776123060092
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DOI: https://doi.org/10.1134/S1063776123060092