Compact all-fiber figure-9 dissipative soliton resonance mode-locked double-clad Er:Yb laser

Krzempek, Karol; Sotor, Jarosław; Abramski, Krzysztof M.

doi:10.1364/ol.41.004995

Cited by 88 publications

(32 citation statements)

References 30 publications

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“…The measured autocorrelation traces presented in Fig. 4 show flat signals, which confirm that the pulses were not noise-like pulses [10,15].…”

Section: Experiments and Discussionsupporting

confidence: 55%

Harmonic dissipative soliton resonance pulses in a fiber ring laser at different values of anomalous dispersion

Lyu¹,

He²,

Chen³

et al. 2017

Photon. Res.

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The pulse dynamics of harmonic mode-locking in a dissipative soliton resonance (DSR) region in an erbiumdoped fiber ring laser is investigated at different values of anomalous dispersion. The fiber laser is mode-locked by a nonlinear polarization rotation technique. By inserting 0-200 m anomalous dispersion single-mode fiber in the laser cavity, the cavity length is changed from 17.3 to 217.3 m, and the corresponding dispersion of the cavity ranges from −0.27 to −4.67 ps 2. The observed results show that the tuning range of repetition rate under a harmonic DSR condition is highly influenced by the cavity dispersion. Furthermore, it is found that, by automatically adjusting their harmonic orders, the lasers can work at certain values of repetition rate, which are independent of the cavity length and dispersion. The pulses at the same repetition rate in different laser configurations have similar properties, demonstrating that each achievable repetition rate represents an operation regime of harmonic DSR lasers.

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“…The measured autocorrelation traces presented in Fig. 4 show flat signals, which confirm that the pulses were not noise-like pulses [10,15].…”

Section: Experiments and Discussionsupporting

confidence: 55%

Harmonic dissipative soliton resonance pulses in a fiber ring laser at different values of anomalous dispersion

Lyu¹,

He²,

Chen³

et al. 2017

Photon. Res.

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Section: Abstract-dissipative Soliton Resonance (Dsr) Is a Soliton Fomentioning

confidence: 99%

“…It has been shown experimentally that high non-linearity plays an important role in the widening pulse [7]. Recently, dissipative soliton square pulses were demonstrated in a novel figure-9 fiber laser configuration with a pulse duration recorded around 455ns and an output energy per pulse about 2.3µJ [8].In this letter, we present, in different configurations, an experimental study on achieving up to 10μJ pulse energy [4,9] for a square pulse operating in a dissipative soliton resonance region, with tunable width in a wide range.Since long fibre cavities were experimentally used in order to favour the generation of high energy square pulses under the DSR regime [10], we have built long cavities operating in an anomalous dispersion regime relaying on nonlinear polarization evolution and figureof-eight mode-locking mechanisms. The first demonstration consists in a simple all fibre ring cavity passively mode-locked through nonlinear polarization evolution.…”

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confidence: 99%

Roadmap to high-energy square pulses in anomalous dispersion fiber lasers

Semaan¹,

Braham²,

Sanchez³

2016

Photon. Lett. Poland

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Abstract-Dissipative soliton resonance (DSR) is a soliton formationwhere the energy in a dissipative system becomes infinite. In the anomalous dispersion regime, this energy is not limited by the soliton area theorem. Since this phenomenon is wave breaking free, it can be useful in designing fiber lasers generating pulses with relatively high energies. Based on this principle, we have demonstrated the emission of high energetic square pulses from Er:Yb double-clad passively modelocked fiber lasers using different mode-locking mechanisms. We first show the evolution of pulse width, energy and peak power by varying the pumping power of the amplifier, then we control separately the characteristic of the output square pulse by assigning each one to an amplifier. Experimental results exhibit record energies in fiber lasers up to 10μJ.The development of fiber laser technology and their multiple applications has stimulated a great interest in investigating novel operational modes such as highenergy and wide width pulses. Since high energy square pulses have applications in different fields such as optical sensors, square-wave clocks and biomedical progress, they have been widely explored. However, it has been a difficult task to achieve high pulse energies because of different limiting factors such as multi-pulsing instabilities that occur on high pumping power. Indeed, in the anomalous dispersion regime the pulse energy is limited by the soliton area theorem while in a normal dispersion regime it is the nonlinear losses combined with the finite gain bandwidth which limit the energy of the pulses. The limitation manifests itself by the emission of additional pulses when the pumping power increases. To overcome these problems, different strategies have been developed like beam shaping. Different kinds of a pulse shape, such as a parabolic pulse, and a square pulse have been generated to satisfy different demands. Achieving high energy square pulses can be realized by exploiting the dissipative soliton resonance (DSR) theory [1], where the energy is not limited by the soliton area theorem and it increases linearly, which allows the pulse width to widen linearly.The first theoretical study of the DSR phenomenon was based on the complex cubic-quintic Ginzburg-Landau equation [1]. It predicts that the soliton energy increases * E-mail: georges.semaan@univ-angers.fr indefinitely with specific parameters while keeping the peak power stable at a certain level. The normal dispersion regime favors larger pulse energy compared to the anomalous dispersion regime [2]. An interesting property is that the energy of the square pulse increases proportionally with the pumping power which allows the pulse duration to widen linearly with the pump power. The square pulses were experimentally observed in setups consisting of the nonlinear polarization evolution mechanism in normal [3] and anomalous dispersion regime [4]. The generation of the DSR square pulse has also been demonstrated in figure-of-eight fiber lasers using optical circulato...

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“…To date now, mode-locked square-wave pulse are generally generated based on the nonlinear amplifying loop mirror (NALM) technique [10][11][12], nonlinear polarization rotation (NPR) mechanism [13]. It is rarely reported that new materials are used as saturable absorbers to generate square-wave pulses due to the damage threshold of these materials is generally low, they cannot withstand large energy pulses.…”

Section: Introductionmentioning

confidence: 99%

“…The characteristic of the pulse is that the energy pulse could increase indefinitely as pump power increases while simultaneously the amplitude remains constant, which is represented in the time domain as flat-top or square-wave pulse. This idea attracted a lot of researches, which led to a large number of published research results and improved the pulse energy to the level of μJ [7-9].To date now, mode-locked square-wave pulse are generally generated based on the nonlinear amplifying loop mirror (NALM) technique [10][11][12], nonlinear polarization rotation (NPR) mechanism [13]. It is rarely reported that new materials are used as saturable absorbers to generate square-wave pulses due to the damage threshold of these materials is generally low, they cannot withstand large energy pulses.…”

mentioning

confidence: 99%

Generation of mode-locked square-shaped and chair-like pulse based on reverse saturable absorption effect of nonlinear multimode interference

Dong¹,

Lin²,

Li³

et al. 2019

Opt. Express

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Abstract：We firstly report mode-locked square-wave pulse in Yb-doped fiber laser based on graded index multimode fiber of reverse suturable absorption. By adjusting the pump power, the width of the square-wave can be tuned range from 350 ps to 52.6 ns with 3dB bandwidth spectrum of 0.73 nm. The supermode suppression ratio exceeds ~ 65 dB, which indicates excellent mode-locked operation state, and we also study the characteristic of pulse by the chirp measurement system. The mode-locked square-wave pulse fiber laser can sever as high power light source for industrial applications. IntroductionAll-fiber-format mode-locked laser has been widely applied among biomedicine, scientific research, and industry due to its compact structure, excellent beam quality and efficient pumping [1]. It is significant to increase the energy of single pulse for the practical application of laser. The traditional soliton pulse energy is limited by the theory of soliton area and is generally limited to the level of hundreds pJ [2]. Diverse approaches have been proposed such as stretched soliton and parabolic pulse, however, these solitons can only output at most a few tens of mJ [3][4][5]. Akhmediev theoretically investigated dissipative soliton resonance (DSR) pulse forming mechanics based on cubic-quintic Ginzburg-Landau equation (CGLE) [6]. The characteristic of the pulse is that the energy pulse could increase indefinitely as pump power increases while simultaneously the amplitude remains constant, which is represented in the time domain as flat-top or square-wave pulse. This idea attracted a lot of researches, which led to a large number of published research results and improved the pulse energy to the level of μJ [7-9].To date now, mode-locked square-wave pulse are generally generated based on the nonlinear amplifying loop mirror (NALM) technique [10][11][12], nonlinear polarization rotation (NPR) mechanism [13]. It is rarely reported that new materials are used as saturable absorbers to generate square-wave pulses due to the damage threshold of these materials is generally low, they cannot withstand large energy pulses. Recently, the nonlinear switching properties or saturable absorber (SA) based on nonlinear multimode interference in graded-index multimode fiber (GIMF) has been widely investigated, which is superiority of low-cost, simple structure, and especially the ability in supporting extremely high damage threshold in high power double cladding fiber laser. It has already used as a saturable absorber in ultrashort fiber laser [14][15][16], however, there is no mode-locked square-wave pulse by adopting GIMF reported so far.In this paper, we firstly experimentally demonstrate the reverse saturable absorption effect in GIMF, which adopt our group proposed a new design of saturable absorber based on offset-spliced GIMF, and use it to output mode-locked square-wave pulse in Yb-doped fiber laser. In our fiber

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Compact all-fiber figure-9 dissipative soliton resonance mode-locked double-clad Er:Yb laser

Cited by 88 publications

References 30 publications

Harmonic dissipative soliton resonance pulses in a fiber ring laser at different values of anomalous dispersion

Harmonic dissipative soliton resonance pulses in a fiber ring laser at different values of anomalous dispersion

Roadmap to high-energy square pulses in anomalous dispersion fiber lasers

Generation of mode-locked square-shaped and chair-like pulse based on reverse saturable absorption effect of nonlinear multimode interference

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