All-fibre heterogeneously-integrated frequency comb generation using silicon core fibre

Ronit Sohanpal (), Haonan Ren, Li Shen (), Callum Deakin, Alexander M. Heidt, Thomas W. Hawkins, John Ballato, Ursula J. Gibson, Anna C. Peacock () and Zhixin Liu ()
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Ronit Sohanpal: University College London
Haonan Ren: Dalian University of Technology
Li Shen: Huazhong University of Science and Technology
Callum Deakin: University College London
Alexander M. Heidt: University of Bern
Thomas W. Hawkins: Clemson University
John Ballato: Clemson University
Ursula J. Gibson: Clemson University
Anna C. Peacock: University of Southampton
Zhixin Liu: University College London

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract Originally developed for metrology, optical frequency combs are becoming increasingly pervasive in a wider range of research topics including optical communications, spectroscopy, and radio or microwave signal processing. However, application demands in these fields can be more challenging as they require compact sources with a high tolerance to temperature variations that are capable of delivering flat comb spectra, high power per tone, narrow linewidth and high optical signal-to-noise ratio. This work reports the generation of a flat, high power frequency comb in the telecom band using a 17 mm fully-integrated silicon core fibre as a parametric mixer. Our all-fibre, cavity-free source combines the material benefits of planar waveguide structures with the advantageous properties of fibre platforms to achieve a 30 nm bandwidth comb source containing 143 tones with 30 dB OSNR over the entire spectral region.

Date: 2022
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DOI: 10.1038/s41467-022-31637-1

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