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Oscillatory motion of a counterpropagating Kerr soliton dimer

Bao, Chengying and Shen, Boqiang and Suh, Myoung-Gyun and Wang, Heming and Safak, Kemal and Dai, Anan and Matsko, Andrey B. and Kärtner, Franz X. and Vahala, Kerry (2021) Oscillatory motion of a counterpropagating Kerr soliton dimer. Physical Review A, 103 (1). Art. No. L011501. ISSN 2469-9926.

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Counterpropagating (CP) solitons generated in high-Q microcavities not only offer useful dual-comb sources, but also provide a new platform to study soliton interactions. Here, we demonstrate and theoretically explain a manifestation of soliton trapping that occurs between CP solitons in a silica microcavity introducing a Kerr soliton dimer. In conventional soliton trapping, the group velocities of two solitons can be synchronized by a Kerr-effect-mediated interaction. The solitons can then copropagate with a fixed temporal delay. However, as shown here, when counterpumping a microcavity using slightly detuned pump frequencies and in the presence of backscattering, the group velocities of clockwise and counterclockwise solitons undergo periodic modulation instead of being locked to a constant velocity. Upon emission from the microcavity, the solitons feature a relative oscillatory motion around a locked average relative displacement with an amplitude that can be larger than the soliton pulse width. This relative motion introduces a sideband fine structure into the optical spectrum of the CP solitons. Our observation provides insights on coherently pumped soliton dimers in microcavities.

Item Type:Article
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URLURL TypeDescription Paper
Shen, Boqiang0000-0003-0697-508X
Suh, Myoung-Gyun0000-0002-9527-0585
Wang, Heming0000-0003-3861-0624
Vahala, Kerry0000-0003-1783-1380
Alternate Title:Forced Oscillatory Motion of Trapped Counter-Propagating Solitons
Additional Information:© 2021 American Physical Society. Received 25 February 2020; revised 15 December 2020; accepted 18 December 2020; published 6 January 2021. This work was supported by the Air Force Office of Scientific Research (Grant No. FA9550-18-1-0353) and the Kavli Nanoscience Institute. C.B. gratefully acknowledges the postdoctoral fellowship from the Resnick Sustainability Institute at Caltech. The research performed by A.M. was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (No. 80NM0018D0004). We thank Qi-Fan Yang for helpful discussion.
Group:Kavli Nanoscience Institute, Resnick Sustainability Institute
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-18-1-0353
Kavli Nanoscience InstituteUNSPECIFIED
Resnick Sustainability InstituteUNSPECIFIED
Issue or Number:1
Record Number:CaltechAUTHORS:20200420-125418330
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:102659
Deposited By: Tony Diaz
Deposited On:20 Apr 2020 21:00
Last Modified:12 Jan 2021 17:50

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