• Advanced Photonics
  • Vol. 2, Issue 3, 034001 (2020)
Weiqiang Wang1、†, Leiran Wang1、2, and Wenfu Zhang1、2、*
Author Affiliations
  • 1Chinese Academy of Sciences, Xi’an Institute of Optics and Precision Mechanics, State Key Laboratory of Transient Optics and Photonics, Xi’an, China
  • 2University of Chinese Academy of Sciences, Beijing, China
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    DOI: 10.1117/1.AP.2.3.034001 Cite this Article Set citation alerts
    Weiqiang Wang, Leiran Wang, Wenfu Zhang. Advances in soliton microcomb generation[J]. Advanced Photonics, 2020, 2(3): 034001 Copy Citation Text show less

    Abstract

    Optical frequency combs, a revolutionary light source characterized by discrete and equally spaced frequencies, are usually regarded as a cornerstone for advanced frequency metrology, precision spectroscopy, high-speed communication, distance ranging, molecule detection, and many others. Due to the rapid development of micro/nanofabrication technology, breakthroughs in the quality factor of microresonators enable ultrahigh energy buildup inside cavities, which gives birth to microcavity-based frequency combs. In particular, the full coherent spectrum of the soliton microcomb (SMC) provides a route to low-noise ultrashort pulses with a repetition rate over two orders of magnitude higher than that of traditional mode-locking approaches. This enables lower power consumption and cost for a wide range of applications. This review summarizes recent achievements in SMCs, including the basic theory and physical model, as well as experimental techniques for single-soliton generation and various extraordinary soliton states (soliton crystals, Stokes solitons, breathers, molecules, cavity solitons, and dark solitons), with a perspective on their potential applications and remaining challenges.
    Aμ·=κ2Aμ+δμ0ηκsinei(ωpω0)t+igμμμAμAμAμ*ei(ωμ+ωμωμωμ)tsout=sinηκAμei(ωμωp)t,(1)

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    ωμ=ω0+D1μ+12D2μ2+16D3μ3+,(2)

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    At=κexSin(κ2+i2πδ)A+k=2nik+1ζkk!kAθk+ig|A|2A,(3)

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    dτdt=1AsImEs*τEbdτ,(4)

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    Weiqiang Wang, Leiran Wang, Wenfu Zhang. Advances in soliton microcomb generation[J]. Advanced Photonics, 2020, 2(3): 034001
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