Design and applications of in-cavity pulse shaping by spectral sculpturing in mode-locked fibre lasers

Sonia Boscolo*, Junsong Peng, Christophe Finot

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We review our recent progress on the realisation of pulse shaping in passively-mode-locked fibre lasers by inclusion of an amplitude and/or phase spectral filter into the laser cavity. We numerically show that depending on the amplitude transfer function of the in-cavity filter, various regimes of advanced waveform generation can be achieved, including ones featuring parabolic-, flat-top- and triangular-profiled pulses. An application of this approach using a flat-top spectral filter is shown to achieve the direct generation of high-quality sinc-shaped optical Nyquist pulses with a widely tunable bandwidth from the laser oscillator. We also present the operation of an ultrafast fibre laser in which conventional soliton, dispersion-managed soliton (stretched-pulse) and dissipative soliton mode-locking regimes can be selectively and reliably targeted by adaptively changing the dispersion profile and bandwidth programmed on an in-cavity programmable filter. The results demonstrate the strong potential of an in-cavity spectral pulse shaper for achieving a high degree of control over the dynamics and output of mode-locked fibre lasers.
Original languageEnglish
Pages (from-to)1379-1398
Number of pages20
JournalApplied Sciences
Issue number4
Publication statusPublished - 25 Nov 2015

Bibliographical note

© 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (


  • mode-locked fibre lasers
  • nonlinear fibre optics
  • frequency filtering
  • nonlinear pulse shaping


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