Temporal cavity solitons in a laser-based microcomb: a path to a self-starting pulsed laser without saturable absorption

Antonio Cutrona, Pierre-Henry Hanzard, Maxwell Rowley, J. S. Totero Gongora, Marco Peccianti, B. A. Malomed, Gian-Luca Oppo, Alessia Pasquazi

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We theoretically present a design of self-starting operation of microcombs based on laser-cavity solitons in a system composed of a micro-resonator nested in and coupled to an amplifying laser cavity. We demonstrate that it is possible to engineer the modulational-instability gain of the system's zero state to allow the start-up with a well-defined number of robust solitons. The approach can be implemented by using the system parameters, such as the cavity length mismatch and the gain shape, to control the number and repetition rate of the generated solitons. Because the setting does not require saturation of the gain, the results offer an alternative to standard techniques that provide laser mode-locking.
Original languageEnglish
Pages (from-to)6629-6646
Number of pages18
JournalOptics Express
Issue number5
Publication statusPublished - 17 Feb 2021


  • microcombs
  • robust solitons
  • microcavity resonators

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