Real-time intensity domain characterization of fibre lasers using spatio-temporal dynamics

Srikanth Sugavanam*, Nikita Tarasov, Dmitry V. Churkin

*Corresponding author for this work

Research output: Contribution to journalSpecial issue

Abstract

Fibre lasers are light sources that are synonymous with stability. They can give rise to highly coherent continuous-wave radiation, or a stable train of mode locked pulses with well-defined characteristics. However, they can also exhibit an exceedingly diverse range of nonlinear operational regimes spanning a multi-dimensional parameter space. The complex nature of the dynamics poses significant challenges in the theoretical and experimental studies of such systems. Here, we demonstrate how the real-time experimental methodology of spatio-temporal dynamics can be used to unambiguously identify and discern between such highly complex lasing regimes. This two-dimensional representation of laser intensity allows the identification and tracking of individual features embedded in the radiation as they make round-trip circulations inside the cavity. The salient features of this methodology are highlighted by its application to the case of Raman fibre lasers and a partially mode locked ring fibre laser operating in the normal dispersion regime.
Original languageEnglish
Article number65
Number of pages15
JournalApplied Sciences
Volume6
Issue number3
DOIs
Publication statusPublished - 25 Feb 2016

Fingerprint

Fiber lasers
fiber lasers
methodology
Radiation
Ring lasers
Raman lasers
ring lasers
Laser modes
continuous radiation
Light sources
lasing
electromagnetic radiation
light sources
cavities
Lasers
radiation
pulses
lasers

Bibliographical note

© 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).

ERC project ULTRALASER, H2020 project CARDIALLY, Russian Ministry of Science and Education (14.584.21.0014); Russian Foundation for Basic Research (projects 16-32-60153, 15-02-07925).

Keywords

  • fibre lasers
  • real-time characterization
  • nonlinear dynamics
  • spatio-temporal dynamics
  • self-organization
  • pattern formation

Cite this

Sugavanam, Srikanth ; Tarasov, Nikita ; Churkin, Dmitry V. / Real-time intensity domain characterization of fibre lasers using spatio-temporal dynamics. In: Applied Sciences. 2016 ; Vol. 6, No. 3.
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Real-time intensity domain characterization of fibre lasers using spatio-temporal dynamics. / Sugavanam, Srikanth; Tarasov, Nikita; Churkin, Dmitry V.

In: Applied Sciences, Vol. 6, No. 3, 65, 25.02.2016.

Research output: Contribution to journalSpecial issue

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T1 - Real-time intensity domain characterization of fibre lasers using spatio-temporal dynamics

AU - Sugavanam, Srikanth

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AU - Churkin, Dmitry V.

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Y1 - 2016/2/25

N2 - Fibre lasers are light sources that are synonymous with stability. They can give rise to highly coherent continuous-wave radiation, or a stable train of mode locked pulses with well-defined characteristics. However, they can also exhibit an exceedingly diverse range of nonlinear operational regimes spanning a multi-dimensional parameter space. The complex nature of the dynamics poses significant challenges in the theoretical and experimental studies of such systems. Here, we demonstrate how the real-time experimental methodology of spatio-temporal dynamics can be used to unambiguously identify and discern between such highly complex lasing regimes. This two-dimensional representation of laser intensity allows the identification and tracking of individual features embedded in the radiation as they make round-trip circulations inside the cavity. The salient features of this methodology are highlighted by its application to the case of Raman fibre lasers and a partially mode locked ring fibre laser operating in the normal dispersion regime.

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