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- 实验方案
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Multiplexed ultrafast fiber laser emitting multi-state solitons
摘要： Ultrafast fiber lasers have been serving as an ideal playground for spreading the extensive industrial applications and exploring the optics nonlinear dynamics. Here, we report a bidirectional fiber laser scheme for validating the possibility of a multiplexed laser system, which is passively mode-locked by the nonlinear polarization rotation (NPR) technique. In particular, the proposed fiber laser consists of one main cavity and two counter-propagating branches with different dispersion distributions. Thus, different formation mechanisms are introduced into the lasing oscillator. Consequently, stable conventional solitons (CSs) and dissipative solitons (DSs) are respectively formed in the clockwise (CW) and counterclockwise (CCW) directions of the same lasing oscillator. Moreover, attributing to the strong birefringence filtering effect, the wavelength selection mechanism is induced. Through the proper management of intra-cavity birefringence, wideband wavelength tuning and switchable multi-wavelength operations are experimentally observed. The central wavelength of CS can be continuously tuned from 1560 nm to 1602 nm. Additionally, the evolution process of different multi-wavelength operations is also elucidated. Benefiting from this multiplexed laser scheme, bidirectional lasing oscillation, multi-state soliton emission, wavelength tuning and multi-wavelength operations are synchronously realized in a single laser cavity. To the best of our knowledge, it is the first time for such a multiplexed fiber laser has been reported. The results provide information for multifunctional ultrafast fiber laser system, which is potentially set for telecommunications, fiber sensing and optics signal processing, etc.
关键词： multi-wavelength operations,nonlinear polarization rotation,wavelength tuning,Ultrafast fiber lasers,dissipative solitons,conventional solitons
更新于2025-11-28 14:24:03
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Generation of dark solitons in erbium-doped fiber laser based on black phosphorus nanoparticles
摘要： We demonstrate the generation of dark solitons (DSs) in erbium-doped fiber (EDF) laser based on black phosphorus nanoparticles (BPNPs) for the first time. The side-polished fiber deposited with BPNPs is embedded into the laser to enhance the birefringence and nonlinearity of the laser cavity. In the paper, the saturable absorption property of BPNPs with an optical modulation depth of 5.7% and a saturable intensity of 21.7 MW/cm2 are experimentally illustrated. After inserting the BPNPs saturable absorber (SA) into EDF laser, the DSs with repetition rate of 14.68 MHz are obtained at a pump power of 90 mW. Our results prove that the BPNPs are the promising candidate materials for generating DSs in EDF laser.
关键词： Side-polished fiber,Dark solitons,Black phosphorus nanoparticles
更新于2025-11-28 14:24:03
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Soliton slow light for closed loop quantum systems
摘要： This paper describes the dynamics of solitonic pulse propagation in a closed loop quantum system comprised of five atomic energy levels. Although the propagation of an intense probe pulse suffers losses and broadening in linear regime, there exist specific conditions where the probe pulse is found to become robust during its propagation. We attribute this regime to the formation of an optical soliton with a slow group velocity because of the balance between the dispersion and Kerr optical nonlinearity. Results obtained are based on the theoretical model using the coupled Maxwell-Bloch equations for the nonlinear propagation.
关键词： Optical solitons,Kerr nonlinearity,Nonlinear pulse propagation,Closed-loop quantum system
更新于2025-09-23 15:23:52
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Optical Solitons In (2+1)–Dimensions With Kundu–Mukherjee–Naskar Equation By Extended Trial Function Scheme
摘要： This paper addresses Kundu–Mukherjee–Naskar equation by the aid of extended trial function method to recover optical soliton solutions in (2+1)–dimensions. The integration algorithm revealed doubly periodic functions. Upon taking the limiting values of the modulus of ellipticity, bright and singular solitons as well as singular periodic solutions emerge. Additional solutions such as plane waves also fall out of the scheme.
关键词： Kundu–Mukherjee–Naskar equation,extended trial function scheme,solitons
更新于2025-09-23 15:23:52
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Bright optical solitons of Chen-Lee-Liu equation with improved Adomian decomposition method
摘要： Optical solitons form the basic fabric in telecommunication industry. It represents a nonlinear pulse or wave packet and travels without changing its shape and velocity across intercontinental distances [1-25]. The unique property of optical solitons is that they interact like particles [6]. One of the models that stems from nonlinear Schrodinger’s equation and is commonly referred to as one of the forms of derivative nonlinear Schrodinger’s equation. It is the Chen-Lee-Liu (CLL) equation [1] and plays vital role in plasmas and optical fiber communications [3-4]. Recently, there has been a significant increase in interest with this model. The focus however is mainly on the analytical aspect and retrieval of soliton solutions to the model. One can find in [7-16] and the references therein where studies related to W-shaped optical solitons, combined optical solitary waves and conservation laws, chirped W-shaped optical solitons, chirped dark and gray solitons, Laplace-Adomian decomposition method, semi-inverse variational principle and Darboux transformation among others are discussed. However, with the increasing interests on efficient numerical techniques for solving nonlinear evolution equations, we consider an algorithm based on the Improved Adomian Decomposition Method (IADM) that was later investigated in [18-19, 2-23] to numerically treat the CLL equation. The recursive algorithm for the model will be determined coupled with error analyses for some special bright optical soliton solutions that are available in the literature.
关键词： bright solitons,Adomian decomposition,numerics.
更新于2025-09-23 15:23:52
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Multi-soliton propagation in generalized inhomogeneous NLS equation with symmetric potentials
摘要： We investigate the generalized inhomogeneous NLS equation with symmetric potentials. Corresponding Lax pair is constructed through AKNS procedure. Based on the obtained Lax pair, one and two soliton solutions are generated via Darboux transformation technique. Using the obtained soliton solution, the impact of symmetric potentials on soliton dynamics is investigated. By tailoring the dispersion and nonlinearity coefficients, propagation properties of solitons are analyzed. Especially, properties of oscillating solitons and tunneling behavior are investigated. From the results, we have found that the symmetric potentials have strong influence on soliton dynamics such as period of oscillations, interaction behavior etc. Obtained results open a new window to controlling the soliton through symmetric potentials.
关键词： soliton control,Darboux Transformation,Optical solitons,symmetric potentials.
更新于2025-09-23 15:23:52
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Modulation stability analysis and solitary wave solutions of nonlinear higher-order Schr?dinger dynamical equation with second-order spatiotemporal dispersion
摘要： In optical fibers, the higher-order nonlinear Schr?dinger (NLS) dynamical equation which describes the beyond the classic slowly varying envelopes and spatiotemporal dispersion of pulses is investigated. By applying the proposed modified extended mapping method, the optical soliton solutions of higher-order NLS dynamical equation with the coefficients of group velocity dispersion, second-order spatiotemporal dispersion and cubic nonlinearity are deduced. The obtained solutions have important applications in applied sciences and engineering. The formation conditions are specified on parameters in which optical solitons can exist for this media. The moments of some constructed solutions are presented graphically which facilitate the researchers to comprehend the physical phenomena of this equation. The modulation instability analysis is utilized to discuss the model stability, which verifies that all obtained solutions are stable and exact. Other such forms of the system arising in sciences and engineering can also be solved by this steadfast, influential and effective method.
关键词： Solitary wave solutions,Higher-order nonlinear Schr?dinger equation,Solitons,Modified extended mapping method
更新于2025-09-23 15:23:52
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Matter wave soliton solutions for driven Gross–Pitaevskii equation with distributed coefficients
摘要： We have obtained the matter wave soliton solution for the driven nonautonomous GP equation with quadratic-cubic nonlinearities. We have revealed their interesting dynamical features for the experimentally realizable form of nonlinear interactions. Additionally, we have described that by suitably choosing some system parameters, we can control their characteristics such as amplitude and width etc. We have found that our results/solutions are stable and can be applied for future applications.
关键词： Bose-Einstein condensates,GP equation,Matter wave solitons,Quadratic-cubic nonlinearity
更新于2025-09-23 15:23:52
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Highly dispersive optical solitons with Kerr law nonlinearity by F-expansion
摘要： This paper employs F-expansion scheme to secure bright, dark, singular and other combo highly dispersive optical solitons when all orders of dispersion up to sixth order are taken into account. There are other solutions that naturally emerge from this scheme as a byproduct. These include Weierstrass function, singular periodic solutions, doubly periodic solutions and so on.
关键词： Complexitons,F-expansion scheme,Solitons
更新于2025-09-23 15:23:52
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Optical solitons to Kundu–Eckhaus equation in the context of birefringent fibers by using of trial equation methodology
摘要： The current paper studies pretty important optical solitons namely bright as well as singular solitons in birefringent fibers through the governing model known as Kundu–Eckhaus equation which is coupled system and is modeled for soliton transmission along birefringent fibers. In order to get such solitons, the trial equation algorithm is employed. Also, singular-periodic solutions in addition to optical solitons are revealed by reversed restriction circumstances.
关键词： Optical solitons,Trial equation approach,The coupled Kundu–Eckhaus equation,Birefringent fibers
更新于2025-09-23 15:22:29