Generation, propagation, and amplification of dark solitons

Zhao, Wei; Bourkoff, E.

doi:10.1364/josab.9.001134

Cited by 74 publications

(20 citation statements)

References 34 publications

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“…Dark solitons show more resistance than bright solitons to perturbations during propagation. Moreover, as the background noise affects mainly the background of the dark solitons, they are less sensitive to background noise [15,16].…”

Section: Introductionmentioning

confidence: 99%

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Initial conditions for dark soliton generation in normal-dispersion fiber lasers

Luo

et al. 2014

Appl. Opt.

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We report results of numerical simulations on the various initial conditions for dark soliton generation in an all-normal-dispersion fiber laser. All the dark solitons generated are odd dark solitons. Differently from the dark soliton generation in fibers, where an arbitrary dip could evolve into a dark soliton, it is found that the dark soliton can originate only from an initial dip with a certain parameter requirement. A bright pulse with either a hyperbolic secant square, Gaussian, or Lorentz profile can be developed into a dark soliton, provided that the parameters of the initial bright pulse are selected. Dark solitons can be generated in fiber lasers only if there is a phase jump, and this phase jump can be maintained and evolve to π during the pulse evolution.

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Section: Introductionmentioning

confidence: 99%

“…One preliminary method is to introduce a phase shift between two interfering branches of guided-wave Mach-Zehnder interferometers; the dark soliton will be generated from the combined output under proper settings [16]. Dark soliton generation in fibers was studied in [5,6,12,17].…”

Section: Introductionmentioning

confidence: 99%

Initial conditions for dark soliton generation in normal-dispersion fiber lasers

Luo

et al. 2014

Appl. Opt.

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“…A method that colliding two chirped-pulses generated multiple dark solitons in a single broad bright pulse at a high repetition rate, over 60 GHz [8]. Other generation methods such as nonlinear generation and direct modulation of continuous-wave light have been proposed [9,10]. Although these methods successfully generated the precision of the waveforms is insufficient for transmission studies.…”

Section: Introductionmentioning

confidence: 99%

Dark soliton synthesis using an optical pulse synthesizer and transmission through a normal-dispersion optical fiber

Kashiwagi¹,

Mozawa²,

Tanaka³

et al. 2013

Opt. Express

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We precisely generate dark solitons using an optical pulse synthesizer (OPS) at a repetition rate of 25 GHz and experimentally investigate soliton transmission through a normal-dispersion fiber. Because of their particular waveform, there are not many experimental studies. The OPS provides frequency-domain line-by-line modulation and produces arbitrary pulse waveforms. The soliton waveform has an intensity contrast greater than 20 dB. At certain input peak power, the pulse exhibits soliton transmission and maintains its initial waveform. The power agrees with soliton transmission theory. We confirm that the π phase shift at the center of the dark soliton is maintained after transmission through the fiber. We also investigate the influence of stimulated Brillouin scattering for long-distance transmission.

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“…Zhao and Bourkoff have studied theoretically the amplification of dark pulses using a modified NLSE with a constant gain [36,37]. An approximation for the fundamental dark soliton with a positive gain (positive Γ) can be represented as: uz; t expie 2Γz − 1∕2Γe Γz tanhte Γz , where uz; t is the normalized amplitude envelope of the pulse, the time variable t is normalized by a characteristic time constant t 0 , and the spatial variable z is normalized by the so-called dispersion length.…”

mentioning

confidence: 99%

Flexible operability and amplification of gray pulses

Zhang

Han

et al. 2014

Opt. Lett.

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We have investigated experimentally the flexible production and amplification of gray pulses for the first time to our knowledge. Switchable wavelengths, tunable pulse-widths, and adjustable contrasts have all been obtained in a fiber laser. Amplification of gray pulses was also experimentally investigated in detail. The contrast of the pulses could also be increased in an amplifier. The robust stability that results from the interactions between adjacent harmonic mode locking counterparts of gray pulses was found to last for up to ten hours. To the best of our knowledge, the gray pulses trains we have generated are the most stable achieved to date in an all-fiber laser system. This finding can be used as a guide for the establishment of robust gray pulses as laser sources.

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Generation, propagation, and amplification of dark solitons

Cited by 74 publications

References 34 publications

Initial conditions for dark soliton generation in normal-dispersion fiber lasers

Initial conditions for dark soliton generation in normal-dispersion fiber lasers

Dark soliton synthesis using an optical pulse synthesizer and transmission through a normal-dispersion optical fiber

Flexible operability and amplification of gray pulses

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