Subharmonic Entrainment Breather Solitons in Ultrafast Lasers

Xian, Tianhao; Zhan, Li; Wang, Qianqian

doi:10.1103/physrevlett.125.163901

Cited by 64 publications

(48 citation statements)

References 31 publications

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“…Moreover, if the two pulses are the same pulse but from adjacent roundtrips, there separation sep T thereby represents the roundtrip time r T of the pulse. In this way, we can obtain the change of roundtrip time from the interferogram, which has help us to catch the subharmonic entrainment breather soliton 35 . Additionally, the change of roundtrip time and relative phase can reflect somewhat the pulse-to-cavity-parameters interaction, which will help to understand the pulse evolution dynamics of mode-locked laser.…”

Section: Resultsmentioning

confidence: 99%

“…The first stage is exhibited in Fig. 5: at the time of pulse buildup, its amplitude oscillates or breathes periodically like breather soliton 20,35 . The breather period is ~5.5 roundtrips and the ratio of breather amplitude (maximal minus minimal energy) to the average energy is larger than 12% at the beginning.…”

Section: Experiments the Experimental Setup Is Shown Inmentioning

confidence: 99%

“…In the interferograms, both the fringe period and the fringe location change synchronously with the pulse intensity (Figs. 5b and 5f), a peculiar property of breather soliton 35 . We retrieve the time separation  and relative phase  using the same method as ref.…”

Section: Experiments the Experimental Setup Is Shown Inmentioning

confidence: 99%

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Time-resolved single-shot revealing pulse evolution dynamics in ultrafast lasers

Xian¹,

Wang²,

Zhan³

2021

Preprint

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Mode-locked lasers are the ideal source for precise measurements, from frequency combs to precise timing, which relies on the accurate control of the intracavity parameters in the lasers to stabilize the pulse. However, by the lack of accurate measurements, the interplays between intracavity parameters and the mode-locked pulse is still not real-time observable. Here, using the dispersive temporal interferometer, we report a method to single-shot probe the pulse evolution dynamics in time domain in the mode-locked laser. As a typical example, we demonstrate the first single-shot observation on the roundtrip time and phase evolutions of intracavity pulse during its buildup and relaxation. Three distinct evolution regimes for pulse buildup are unveiled for the first time. Moreover, the physical mechanism of the time-location and phase changes in these three regimes has also been analyzed, respectively. Our researches present a novel method to observe the intracavity-parameters-to-pulse interaction, which will improve laser design, ultrafast diagnostics, and nonlinear optics.

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Section: Resultsmentioning

confidence: 99%

Section: Experiments the Experimental Setup Is Shown Inmentioning

confidence: 99%

See 1 more Smart Citation

Time-resolved single-shot revealing pulse evolution dynamics in ultrafast lasers

Xian¹,

Wang²,

Zhan³

2021

Preprint

Self Cite

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“…3(g)-3(j). Energy oscillation is a characteristic behavior of soliton pulsation [36,37], but there are some exceptions; e.g., the "invisible soliton pulsation" exhibits the invariable pulse energy [38]. Then, the intensity, bandwidth, and duration of the pulse suddenly decline from ∼3580 to ∼3590 RTs and the laser finally reaches the stable SP mode-locking state.…”

Section: Soliton Metamorphosis Dynamics From Ds To Spmentioning

confidence: 99%

Soliton metamorphosis dynamics in ultrafast fiber lasers

Zeng

et al. 2021

Phys. Rev. A

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The transitions from the incoherent noise to the coherent soliton have been fully revealed in ultrafast lasers. However, the soliton transformation between different coherent states, termed as soliton metamorphosis, remains an attractive yet uncharted territory. Here, we reveal the ultrafast dynamics of the soliton metamorphosis via single-shot spectroscopy in a specially designed fiber laser capable of emitting fast-switchable dissipative solitons and stretched pulses. It is demonstrated that the soliton metamorphosis is a consecutive evolution process including the self-phase modulation stage, pulse split stage, and transient stretched pulse stage. Particularly, the long-period pulse breathing and the spectral period doubling appear in the forepart and middle part of the last stage. The metamorphosis dynamics and soliton properties are substantiated by numerical simulation based on a three-step model. This work not only unveils the transient evolution physics of the pulse in soliton metamorphosis, but also provides a simple and effective way to control operations of ultrafast lasers.

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“…Breathers are also closely related to exceptional points, [6] thereby opening a novel avenue for the exploration of exceptional-point physics. Besides their significance in nonlinear science, breathers also bear interesting possibilities for practical applications.…”

Section: Introductionmentioning

confidence: 99%

Intelligent Breathing Soliton Generation in Ultrafast Fiber Lasers

Peng

Boscolo

et al. 2021

Laser & Photonics Reviews

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Harnessing pulse generation from an ultrafast laser is a challenging task as reaching a specific mode-locked regime generally involves adjusting multiple control parameters, in connection with a wide range of accessible pulse dynamics. Machine-learning tools have recently shown promising for the design of smart lasers that can tune themselves to desired operating states. Yet, machine-learning algorithms are mainly designed to target regimes of parameter-invariant, stationary pulse generation, while the intelligent excitation of evolving pulse patterns in a laser remains largely unexplored. Breathing solitons exhibiting periodic oscillatory behavior, emerging as ubiquitous mode-locked regime of ultrafast fibre lasers, are attracting considerable interest by virtue of their connection with a range of important nonlinear dynamics, such as exceptional points, and the Fermi-Pasta-Ulam paradox. Here, we implement an evolutionary algorithm for the self-optimisation of the breather regime in a fibre laser modelocked through a four-parameter nonlinear polarisation evolution. Depending on the specifications of the merit function used for the optimisation procedure, various breathingsoliton states are obtained, including single breathers with controllable oscillation period and breathing ratio, and breather molecular complexes with a controllable number of elementary constituents. Our work opens up a novel avenue for exploration and optimisation of complex dynamics in nonlinear systems.

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Subharmonic Entrainment Breather Solitons in Ultrafast Lasers

Cited by 64 publications

References 31 publications

Time-resolved single-shot revealing pulse evolution dynamics in ultrafast lasers

Time-resolved single-shot revealing pulse evolution dynamics in ultrafast lasers

Soliton metamorphosis dynamics in ultrafast fiber lasers

Intelligent Breathing Soliton Generation in Ultrafast Fiber Lasers

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