Turbulence-induced square-root broadening of the Raman fiber laser output spectrum

Babin, Sergey A.; Churkin, Dmitry V.; Ismagulov, A. E.; Kablukov, S. I.; Podivilov, E. V.

doi:10.1364/ol.33.000633

Cited by 48 publications

(32 citation statements)

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“…2(a). This value is defined by the cross-phase modulation with the pump wave, so the generation spectrum acquires the spectral width being proportional to the spectral width of the used pump source 8 . The maximum observed spectrum width is below 200 pm, which is also remarkably low value for 11 W of generation power.…”

Section: Experiments and Discussionmentioning

confidence: 99%

“…Long (hundreds of meters) RFLs are characterized by a broad generation spectrum (a typical spectrum width is about 1 nm) influenced by strong nonlinear spectral broadening via four-wave mixing of different longitudinal modes 8 , 9 . The resulting number of generated modes could be very high -up to hundreds of millions, being proportional to the spectral width and inversely proportional to the cavity length.…”

Section: Introductionmentioning

confidence: 99%

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Nonlinear mixing and mode correlations in a short Raman fiber laser

2014

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In the present paper we experimentally demonstrate a generation in a short Raman fiber laser having 10 000 different longitudinal modes only. We design the laser using 12 meters of commercially available fiber. Contrary to the recently demonstrated single longitudinal mode DFB Raman laser and short DBR Raman laser, in the laser under study the number of modes is high enough for efficient nonlinear interactions. Experimentally measured time dynamics reveals the presence of mode correlations in the radiation: the measured extreme events lasts for more than 10 round-trips.

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Section: Experiments and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nonlinear mixing and mode correlations in a short Raman fiber laser

2014

Self Cite

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“…Meanwhile, it is well known that nonlinear broadening is a crucial factor determining spectral shape of the generation of Raman fiber lasers [43][44][45] and the spectral width of the random DFB fiber lasers depends both on nonlinearity and dispersion 40 . We consider here only the region of the pump power under and near the generation threshold, where nonlinear effect are negligible because of small Stokes wave power.…”

Section: Spectral Balance Modelmentioning

confidence: 99%

Modeling of the spectrum in a random distributed feedback fiber laser within the power balance modes

Vatnik

Churkin

2014

SPIE Proceedings

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The simplest model for a description of the random distributed feedback (RDFB) Raman fiber laser is a power balance model describing the evolution of the intensities of the waves over the fiber length. The model predicts well the power performances of the RDFB fiber laser including the generation threshold, the output power and pump and generation wave intensity distributions along the fiber. In the present work, we extend the power balance model and modify equations in such a way that they describe now frequency dependent spectral power density instead of integral over the spectrum intensities. We calculate the generation spectrum by using the depleted pump wave longitudinal distribution derived from the conventional power balance model. We found the spectral balance model to be sufficient to account for the spectral narrowing in the RDFB laser above the threshold of the generation.

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“…Such dynamics can manifest themselves in the form of soliton rains [2,3] and molecules [4], soliton explosions [5][6][7], optical turbulence [8][9][10][11][12][13][14][15] and rogue waves [16][17][18][19][20][21]. An understanding of such dynamic regimes is of interest from both an academic and experimental perspective, as one would like to ensure stable operation and avoid excursions between operational regimes.…”

Section: Introductionmentioning

confidence: 99%

Real-Time Intensity Domain Characterization of Fibre Lasers Using Spatio-Temporal Dynamics

2016

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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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Turbulence-induced square-root broadening of the Raman fiber laser output spectrum

Cited by 48 publications

References 0 publications

Nonlinear mixing and mode correlations in a short Raman fiber laser

Nonlinear mixing and mode correlations in a short Raman fiber laser

Modeling of the spectrum in a random distributed feedback fiber laser within the power balance modes

Real-Time Intensity Domain Characterization of Fibre Lasers Using Spatio-Temporal Dynamics

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