Effect of narrow spectral filter position on the characteristics of active similariton mode-locked femtosecond fiber laser

Kotb, Hussein E.; Abdelalim, Mohamed A.; Anis, Hanan

doi:10.1364/oe.23.029660

Cited by 10 publications

(5 citation statements)

References 25 publications

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“…The model was used to study the effect of the input pulse parameters on the output pulse shape after propagating through the normal dispersion gain medium. The excess kurtosis factor 𝐾 is used to indicate the output pulse shape [13], [28], [29], where the values of -1.2, -1, -0.86, −0.594, 0, and 1.2 are for rectangular, semicircle, parabolic, raised cosine, Gaussian and sech squared > REPLACE THIS LINE WITH YOUR MANUSCRIPT ID NUMBER (DOUBLE-CLICK HERE TO EDIT) < pulse shapes, respectively. The excess kurtosis for the pulse in the time domain is calculated as [30]:…”

Section: Resultsmentioning

confidence: 99%

“…The forward direction ASE is calculated using the same numerical method as that of the backward direction (solving (5) with a positive sign). The electric field envelopes are calculated by using the fourth-order Runge-Kutta split-step Fourier transform algorithm [13], [23]- [25] to solve the coupled nonlinear Schrödinger's equations (CNLSEs) given by [15], [26], [27]:…”

Section: Numerical Modelmentioning

confidence: 99%

“…A distributed gain term, which accounts for the gain variation along the propagation distance, has been used in the nonlinear Schrödinger equation [2], [3], [8], [12]. Spectral dependence of the gain and gain saturation were considered in [7], [13]. The gain spectral shape was given a parabolic profile.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical Study of Parabolic Pulse Generation in Backward-Pumped Erbium-Doped Fiber Amplifiers

Othman

Kotb

Abdelalim³

et al. 2022

IEEE Photonics J.

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In this paper, the actual shape of the gain spectrum and the whole dispersion curve of the Er-doped fiber are employed in the vectorial coupled nonlinear Schrödinger equation to model the parabolic pulse (similariton) generation in the backwardpumped Er-doped fiber amplifier. The input of the amplifier is Gaussian pulses of a high repetition rate. The numerical model is developed to account for the combination of input and amplified spontaneous emission powers to consider the average of all prior iterations in the present interaction to reach a converged solution rather than oscillating between two solutions. The excess kurtosis factor identifies the parabolic pulse among other pulse shapes. The effect of the input pulse width, peak power, and polarization and the impact of the input pump power and the fiber length on the similariton generation are studied.

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Section: Resultsmentioning

confidence: 99%

Section: Numerical Modelmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Study of Parabolic Pulse Generation in Backward-Pumped Erbium-Doped Fiber Amplifiers

Othman

Kotb

Abdelalim³

et al. 2022

IEEE Photonics J.

Self Cite

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“…Then, we have followed the derivation of the nonlinear Schrödinger equation (NLSE), a PDE that describes the propagation in dispersive and nonlinear mediums [27]. It has been solved numerically before by using the split-step Fourier method (SSFM) [27,44] and this solution is developed and considered in RONST too [45][46][47][48][49][50]. The SSFM is a numerical technique that behaves much faster when compared to the conventional finite-difference methods [44].…”

Section: Numerical Modeling Approachmentioning

confidence: 99%

Radio Optical Network Simulation Tool (RONST)

Abdelhak¹,

Kamel²,

Hafez³

et al. 2022

Computers, Materials &Amp; Continua

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This paper presents a radio optical network simulation tool (RONST) for modeling optical-wireless systems. For a typical optical and electrical chain environment, performance should be optimized concurrently before system implementation. As a result, simulating such systems turns out to be a multidisciplinary problem. The governing equations are incompatible with co-simulation in the traditional environments of existing software (SW) packages. The ultra-wideband (UWB) technology is an ideal candidate for providing high-speed short-range access for wireless services. The limited wireless reach of this technology is a significant limitation. A feasible solution to the problem of extending UWB signals is to transmit these signals to endusers via optical fibers. This concept implies the need for the establishment of a dependable environment for studying such systems. Therefore, the essential novelty of the proposed SW is that it provides designers, engineers, and researchers with a dependable simulation framework that can accurately and efficiently predict and/or optimize the behavior of such systems in a single optical-electronic simulation package. Furthermore, it is supported by a strong mathematical foundation with integrated algorithms to achieve broad flexibility and low computational cost. To validate the proposed tool, RONST was deployed on an ultra-wideband over fiber (UWBoF) system. The bit error rate (BER) has been calculated over a UWBoF system, and there is good agreement between the experimental and simulated results.

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“…Solitons, which are the localized formations in nonlinear systems 1 , appear in various physical settings 2 3 4 5 6 7 8 9 10 11 12 13 14 15 . The soliton on a water surface was first described by John Scott Russell and the fundamental concept of soliton in mathematical physics was first introduced by Norman Zabusky and Martin Kruskal 10 11 .…”

mentioning

confidence: 99%

Discrete bisoliton fiber laser

Liu

Han

Yao

2016

Sci Rep

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Dissipative solitons, which result from the intricate balance between dispersion and nonlinearity as well as gain and loss, are of the fundamental scientific interest and numerous important applications. Here, we report a fiber laser that generates bisoliton – two consecutive dissipative solitons that preserve a fixed separation between them. Deviations from this separation result in its restoration. It is also found that these bisolitons have multiple discrete equilibrium distances with the quantized separations, as is confirmed by the theoretical analysis and the experimental observations. The main feature of our laser is the anomalous dispersion that is increased by an order of magnitude in comparison to previous studies. Then the spectral filtering effect plays a significant role in pulse-shaping. The proposed laser has the potential applications in optical communications and high-resolution optics for coding and transmission of information in higher-level modulation formats.

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Effect of narrow spectral filter position on the characteristics of active similariton mode-locked femtosecond fiber laser

Cited by 10 publications

References 25 publications

Numerical Study of Parabolic Pulse Generation in Backward-Pumped Erbium-Doped Fiber Amplifiers

Numerical Study of Parabolic Pulse Generation in Backward-Pumped Erbium-Doped Fiber Amplifiers

Radio Optical Network Simulation Tool (RONST)

Discrete bisoliton fiber laser

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