Impact of Spectral Filtering on Multi-pulsing Instability in Mode-locked Fiber Lasers

Xianting Zhang, Feng Li, Kaliyaperumal Nakkeeran, Jinhui Yuan, Zhe Kang, J. Nathan Kutz, P. K. A. Wai

Research output: Contribution to journalArticle

11 Citations (Scopus)
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We investigate the impact of spectral filtering in mode-locked fiber lasers with an extended geometrical model. Our iterative model, which includes gain, loss and the pulse shaping effects of chromatic dispersion and self-phase modulation, is used to model the laser cavity dynamics. Simulations show that broadband pulses experience large losses from spectral filtering in the cavity, leading to a number of potential laser instabilities and outcomes such as multi-pulsing, periodic and chaotic states, or a single pulse which transitions to a higher energy state. For narrow band spectral filtering, the laser dynamics is dominated by the gain-loss dynamics in the cavity which causes multi-pulsing. For broadband spectral filtering, the nonlinearity induced spectral reshaping of the single pulse can lead to a discontinuous pulse energy transition that circumvents multi-pulsing. The inclusion of third order dispersion shows that the multi-pulsing instability is induced even in the case of broadband spectral filtering.
Original languageEnglish
Article number1101309
Pages (from-to)1-9
Number of pages9
JournalIEEE Journal of Selected Topics in Quantum Electronics
Issue number3
Early online date10 Nov 2017
Publication statusPublished - May 2018


  • Mode-locked fiber lasers
  • spectral filtering
  • multi-pulsing
  • nonlinear dynamics

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