Four-wave mixing of linear waves and solitons in fibres with higher order dispersion
A. V. Yulin, D. V. Skryabin, P. St. J. Russell
我们推导出任意色散光纤中孤子和线性波之间四波混频的相位匹配条件，并通过这个过程演示了新的光谱分量的共振激发。
We derive phase-matching conditions for four-wave mixing between solitons and linear waves in optical fibres with arbitrary dispersion and demonstrate resonant excitation of new spectral components via this process.
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Dispersion map induced energy transfer between solitons in optical fibres
我们提出了一个实验装置来研究碰撞诱导孤子放大。在具有反常色散的光纤（$β_2 < 0$）中，我们用正常色散光纤（$β_2 > 0$）替换光纤的小区域。我们发现，孤子碰撞在这个区域能够交换能量。根据孤子对的相对相位，我们发现，能量转移可以导致超过$20\%$的能量增益为每个碰撞。一系列这样的事件可以用来进一步提高能量增益，允许相当大的孤子放大的可能性。这种能量转移不需要三阶色散或拉曼项。
Optical Solitons in Hollow-Core Fibres
本文回顾了充气空芯光纤中光孤子动力学的研究，涵盖不同光纤结构对孤子传输、自压缩、自频移和色散波发射的影响，展示了从兆瓦到太瓦功率、亚飞秒脉宽及跨紫外到近红外的可调谐脉冲产生。
Optical soliton dynamics can cause the extreme alteration of the temporal and spectral shape of a propagating light pulse. They occur at up to kilowatt peak powers in glass-core optical fibres and the gigawatt level in gas-filled microstructured hollow-core fibres. Here we demonstrate optical soliton dynamics in large-core hollow capillary fibres. This enables scaling of soliton effects by several orders of magnitude to the multi-mJ energy and terawatt peak power level. We experimentally demonstrate two key soliton effects. First, we observe self-compression to sub-cycle pulses and infer the c…
Spectral tailoring of Raman soliton generation via a dispersion-managed fibre Fabry-Pérot resonator
本文通过色散管理光纤法布里-珀罗谐振器，将拉曼孤子中心频率从常规的13 THz下移调整至7.8 THz，实现了光谱裁剪，并利用L-band EDFA放大和FROG表征。
A New Thermodynamic Approach to Multimode Fibre Self-cleaning and Soliton Condensation
本文提出基于加权玻色-爱因斯坦定律的光学多模系统热力学理论，通过比较正常色散自清洁与反常色散孤子凝聚实验，发现两者热力学参数高度相似，揭示两种热化过程具有共同基础。
We investigate soliton self-compression and ultraviolet resonant dispersive wave emission in the higher-order modes of a gas-filled hollow capillary fibre. Our simple analytical scaling rules predict shorter required waveguides and different energy scales when moving from the fundamental to higher-order modes. Experimentally, we demonstrate soliton self-compression and ultraviolet dispersive wave emission in the double-lobe LP$_{11}$ mode of an argon-filled hollow capillary fibre, which we excite by coupling into the fibre at oblique incidence. We observe the generation of ultraviolet dispersi…
A systematic numerical study of ultrafast nonlinear directional coupler performance based on soliton self-trapping in a novel type of dual-core optical fibre is presented. The considered highly nonlinear fibre structure is composed of a real, intentionally developed soft glass-pair with high refractive index contrast at the level of 0.4 in the near infrared. Nonlinear propagation of picojoule level femtosecond pulses was studied numerically with the aim to identify the best switching performance in input parameter space of 1400 - 1800 nm in terms of excitation wavelengths, and of 75 - 150 fs i…
Dynamics of Vector Soliton Singlets and Pairs in Self-Mode-Locked Tm-Doped Fibre Lasers
本研究针对矢量孤子产生的复杂动力学机制尚不明确的问题，通过色散傅里叶变换技术表征自锁模掺铥光纤激光器中孤子的形成过程，揭示了单孤子与松散束缚双脉冲态的产生机制及偏振分裂的影响因素，深化了对矢量孤子动力学的认知。
Rogue wave generation by inelastic quasi-soliton collisions in optical fibres
我们证明了一个简单的级联机制，驱动流氓波的形成和出现在广义非线性薛定谔方程与三阶色散。这种概念上新颖的产生机制是基于准孤子的非弹性碰撞，并很好地描述了成对准孤子碰撞中能量转移的类共振散射行为。我们的研究结果表明，流氓波出现的阈值和存在一个时期的振幅减少-“风暴前的平静”-流氓波事件的到来之前。与超长的时间窗口模拟的$3.865\times 10^{6}$ ps相比，我们观察到的流氓波在光纤中的统计信息，具有前所未有的详细程度和准确性，明确地建立了流氓波功率分布函数超过7个数量级的远程字符。
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. Bre…
Unified model for breathing solitons in fibre lasers: Mechanisms across below- and above-threshold regimes
本文提出了一种统一模型，用于研究光纤激光中呼吸型孤子的机制，揭示了低于阈值和高于阈值区域的动力学差异及形成机制。
Characteristics and stability of soliton crystals in optical fibres for the purpose of optical frequency comb generation
我们研究了孤子晶体的性质，孤子晶体是几个光脉冲的束缚态，这些光脉冲以固定的时间间隔通过所提出的用于天文光谱仪校准的光学频率梳（OFC）产生方法的光纤传播。这种方法也适用于其他应用的亚微微秒脉冲产生，由传统的单模光纤和适当泵浦的掺铒光纤组成。两个连续波激光器被用作光源。在较低的输入功率下，孤子晶体从初始深度调制的激光场中产生;在较高的输入功率下，它分解为自由孤子。我们研究了孤子晶体建立在第一光纤阶段相对于不同的光纤参数（群速度色散，非线性，和光损耗）和光源特性（激光频率分离和强度差）。我们证明了孤子晶体可以用两个量来描述，即它的基频和晶体溶解成自由孤子的激光功率阈值。该孤子晶体同时具有线性和非线性的光学特性，对初始激光功率波动不敏感。我们使用称为孤子辐射拍分析的数值技术进行研究。
Large net-normal dispersion Er-doped fibre laser mode-locked with a nonlinear amplifying loop mirror
我们报告了一个环境稳定的，全PM光纤，掺铒，锁模激光器的中心波长为1550 nm。值得注意的是，该激光器具有大的净正常色散，使得其动力学与具有类似结构的1 μm全正常色散光纤激光器的动力学相当。该激光器是锁模与非线性放大环镜产生的脉冲是外部可压缩到500 fs。实验结果与数值模拟结果吻合较好。
Nonlinear optics of fibre event horizons
光纤中光的非线性相互作用可以模拟事件视界的物理现象。当弱探测波无法通过强孤子时，尽管以不同的速度传播，也会出现这种类似情况。到目前为止，这些动态已被描述在时域中的孤子引起的折射率障碍，修改的速度的探头。在这里，我们完成了光纤事件视界的物理描述，提出了一个完整的频域描述的级联四波混频离散单频场之间，并通过实验证明使用连续波激光签名频移。我们的描述证实了显着的协议与实验中进行的连续极限，达到使用超快激光。我们预计，澄清光纤事件视界的描述将显着影响的视界动力学和光子学和其他系统中的孤子相互作用的描述。
Mode-locked fibre lasers are important sources of ultrashort pulses, where stable pulse generation is achieved through a balance of periodic amplitude and phase evolutions. A range of distinct cavity pulse dynamics have been revealed, arising from the interplay between dispersion and nonlinearity in addition to dissipative processes such as filtering. This has led to the discovery of numerous novel operating regimes, offering significantly improved laser performance. In this Topical Review, we summarise the main steady-state pulse dynamics reported to date through cavity dispersion engineering…
Nonlinear photonic crystal fibres: pushing the zero-dispersion toward the visible
光子晶体光纤中的强波导色散为零色散波长$λ_0$远低于二氧化硅材料色散设定的~1.3微米的极限的非线性光学提供了独特的机会。通过调整空气孔直径d、间距λ和空气孔环的数量N，强波导色散原则上可以用于将λ_0很好地扩展到可见光中，尽管在某种程度上以多模操作为代价。我们详细地研究了零色散波长、截止波长λ c和泄漏损耗在由d、λ和N构成的参数空间中的相互作用。作为特定的结果，我们确定d（~500 nm）和λ（~700 nm）的值，其促进最短可能的零色散波长（~700 nm），同时光纤对于较长波长仍然是单模的。
Experimental and numerical analysis of the chromatic dispersion dependence upon the actual profile of small core microstructured fibres
用有限元法计算了小芯径微结构光纤（SCMF）基模的色散曲线，并用低相干干涉法测量了色散曲线。指出了色散对SCMF几何参数（节距和直径）变化的高度敏感性。在半微米光谱带宽[1.1 $μ$ m-1.6 $μ$ m]范围内，数值计算结果与实验结果吻合良好。
A Lower Bound on the per Soliton Capacity of the Nonlinear Optical Fibre Channel
本文导出了存在（光）放大器自发辐射（ASE）噪声时非线性光纤信道每孤子容量下限的封闭表达式。这个界限是基于一个非高斯条件概率密度函数的孤子振幅抖动引起的ASE噪声，并被证明增长的信号-噪声比的增加。
Variational approach for walking solitons in birefringent fibres
我们使用变分法获得近似的解析表达式时，在两个组件之间的相速度和群速度的差异和快速振荡项考虑双折射光纤中的稳态脉冲状的解决方案。在检验近似的有效性后，我们研究了孤子脉冲形状如何依赖于它的速度和非线性传播常数。通过数值求解传播方程，我们发现这些定态解大多数是稳定的。
Breathing solitons are nonlinear waves in which the energy concentrates in a localized and oscillatory fashion. Similarly to stationary solitons, breathers in dissipative systems can form stable bound states displaying molecule-like dynamics, which are frequently called breather molecules. So far, the experimental observation of optical breather molecules and the real-time detection of their dynamics have been limited to diatomic molecules, that is, bound states of only two breathers. In this work, we report on the observation of different types of breather complexes in a mode-locked fibre las…
Measured group birefringence and group velocity dispersion of elliptical-core ZBLAN fibres for mid-infrared supercontinuum generation
本研究通过测量椭圆芯ZBLAN光纤的群双折射和群速度色散，为中红外超连续谱生成提供支持，并促进对ZBLAN光纤中非线性光学现象的理解。
Ultra-low-noise supercontinuum in normal-dispersion ZBLAN fibres pumped at 1.85 $μ$m
研究首次在正常色散氟化物光纤中利用飞秒脉冲产生超低噪声超连续谱，通过两种椭圆芯偏振维持ZBLAN光纤实验，展示出超低噪声超连续谱的产生及低噪声特性。
Broadband dispersion engineered microresonator on-a-chip
控制光纤波导中的色散对于光纤通信系统以及最近对于从紫外到中红外的连续谱的产生是至关重要的。可以通过改变光纤芯直径或折射率阶跃来设置群速度色散过零的波长。此外，使用多包层光纤，可以采用复杂的方法来操纵高阶色散，以便在宽带宽上形成甚至平坦化色散。在这里，我们介绍的设计和制造技术，允许类似的色散控制芯片集成光学微谐振器，从而展示了更高阶，宽带宽的色散控制的倍频程的频谱。重要的是，我们用于色散控制的制造方法同时允许光学Q因子超过1亿，这对于非线性光学振荡器的有效操作至关重要。近年来，随着人们对芯片可集成光学频率梳的兴趣增加，高Q系统中的色散控制变得越来越重要。
Nonlinear dynamics in breathing-soliton lasers
本文综述了呼吸孤子光纤激光器中的非线性动力学研究，利用遗传算法等先进手段发现了频率锁定呼吸子、分形Farey层级等丰富行为，并识别出通往混沌的新途径，凸显了其作为复杂耗散动力学模型系统的价值。
Self-starting Dynamics in All-fibre All-Normal-Dispersion Thulium Mamyshev oscillator
本研究实现了首个1.9μm附近自启动全光纤全正常色散掺铥玛姆舍夫振荡器，揭示其脉冲建立路径，为开发紧凑稳健的短波红外光源提供了关键方案。
The dynamical Casimir effect is the generation of pairs of real particles or photons from the vacuum as a result of a non-adiabatic change of a system parameter or boundary condition. As opposed to standard parametric amplification where the modulation occurs both in space and in time, this fundamental process requires a pure modulation in time, which makes its detection particularly challenging at optical frequencies. In this paper we experimentally demonstrate a realisation of the optical analogue of the mechanical dynamical Casimir effect in the near-infrared optical regime in a dispersion-…
Bound states of dispersion-managed solitons in a fiber laser at near zero dispersion
报道了在近零净腔群速度色散（GVD）下，在被动锁模掺铒光纤激光器中观察到的色散管理（DM）孤子的各种束缚态。所产生的DM孤子具有类高斯的光谱轮廓，没有边带，这与具有大净负腔GVD的光纤激光器中产生的常规孤子、具有正腔GVD的光纤激光器中产生的抛物线脉冲以及具有大净负腔GVD的光纤激光器中产生的增益引导孤子不同。此外，还观察到了孤子间距固定的DM孤子的束缚态。我们证明了这些束缚孤子可以作为一个单元形成束缚态。数值模拟验证了我们的实验观察。
Geometric origin of rogue solitons in optical fibres
非确定性巨波，被称为流氓波、杀手波、怪物波或畸形波，在物理学的许多不同分支中都有报道。然而，它们的起源仍然是未知的：尽管有大量的数字和实验证据，它们自发形成的最终原因尚未确定。在这里，我们表明，流氓波在光纤实际上是从一个复杂的动态过程非常相似的众所周知的机制，如玻璃化转变和蛋白质折叠。我们描述了光孤子之间的相互作用如何在具有多个准平衡点的高维参数空间中产生能量景观。这些配置具有相同的统计分布所观察到的流氓事件，并探讨在光动力学过程中，由于孤子碰撞，非弹性机制增强的过程。稍微不同的初始条件导致非常不同的动力学在这个复杂的几何形状;一个流氓孤子原来是源于一个特定的深准平衡点的能量景观，系统可能会被短暂地捕获在演化过程中。这种解释将证明是富有成果的广大社区感兴趣的反常波。
Micro-combs [1 - 4], optical frequency combs generated by integrated micro-cavity resonators, offer the full potential of their bulk counterparts [5,6], but in an integrated footprint. The discovery of temporal soliton states (DKS dissipative Kerr solitons) [4,7-11] as a means of modelocking microcombs has enabled breakthroughs in many fields including spectroscopy [12,13], microwave photonics [14], frequency synthesis [15], optical ranging [16,17], quantum sources [18,19], metrology [20,21] and more. One of their most promising applications has been optical fibre communications where they hav…
Bright Chirp-free and Chirped Nonautonomous solitons under Dispersion and Nonlinearity Management
利用达布变换，从平凡种子出发，给出了广义非线性分布系数薛定谔方程（NLSE）的一系列无啁啾和啁啾解析非自治孤子解.对于无啁啾的非自治孤子，色散管理项可以改变非自治孤子的运动，而对孤子的形状没有影响。特别是在没有增益的情况下，经典光孤子可以表现为可变色散项和非线性。对于啁啾非自治孤子，色散管理会影响孤子的形状和运动。周期色散项可以用来控制孤子的“呼吸”形状，并且在一定条件下不影响非自治孤子中心的运动轨迹。
Stable dark and bright soliton Kerr combs can coexist in normal dispersion resonators
利用Lugiato-Lefever模型，分析了正常色散区中三阶色散对暗孤子和亮孤子克尔频率梳的存在性和稳定性的影响。在没有三阶色散的情况下，在一个扩展的参数范围内只存在暗孤子，而三阶色散允许稳定的暗孤子和亮孤子共存。可逆性被打破，连接顶部和底部均匀解决方案的开关波的形状被修改。亮孤子的产生是由于开关波剖面中振荡的产生。最后，在足够强的三阶色散存在下，暗孤子的振荡不稳定性也得到了抑制。
Thirring Solitons in the presence of dispersion
本文研究了色散或衍射对非线性光纤中零速孤子的影响。数值计算表明，零色散/零衍射时的Thirring孤子由三个孤立的孤子分支以有限的间隔分开。在间隙内，存在无限多孤子分支。因此，Thirring孤子在结构上是不稳定的。在另一个参数区域（远离Thirring极限），孤子处处存在.
Microresonator Soliton Frequency Combs in the Zero-Dispersion Regime
本文研究了零群速度色散区域下连续波激光驱动的孤子产生动力学，首次观察到由五阶色散主导的多峰结构零色散孤子分子，数值模拟与实验结果吻合，可应用于超快光学、电信和光谱学。
Femtosecond soliton amplification in nonlinear dispersive traps and soliton dispersion management
研究了非线性脉冲在变参数光纤中的传输特性。利用放大光纤中形成的色散陷阱捕获飞秒色孤子在频域的运动，可以积累额外的能量，并显著缩短孤子脉冲宽度。研究了啁啾孤子脉冲在色散管理系统中的非线性动力学行为。所开发的方法确实提供了一种系统的方法来产生具有变系数的非线性薛定谔方程（NSE）的啁啾孤子解的无限“海洋”。
Temporal solitons are optical pulses that arise from the balance of negative group-velocity dispersion and self-phase modulation. For decades only quadratic dispersion was considered, with higher order dispersion thought of as a nuisance. Following the recent reporting of pure-quartic solitons, we here provide experimental and numerical evidence for an infinite hierarchy of solitons that balance self-phase modulation and arbitrary negative pure, even-order dispersion. Specifically, we experimentally demonstrate the existence of solitons with pure-sextic ($β_6$), -octic ($β_8$) and -decic ($β_{…
We report on an experimental and numerical study of temporal Kerr cavity soliton dynamics in dispersion-managed fiber ring resonators. We find that dispersion management can significantly magnify the Kelly-like resonant radiation sidebands emitted by the solitons. Because of the underlying phase-matching conditions, the sideband amplitudes tend to increase with increasing pump-cavity detuning, ultimately limiting the range of detunings over which the solitons can exist. Our experimental findings show excellent agreement with numerical simulations.
Solitons are shape preserving waveforms that are ubiquitous across nonlinear dynamical systems and fall into two separate classes, that of bright solitons, formed in the anomalous group velocity dispersion regime, and `dark solitons' in the normal dispersion regime. Both types of soliton have been observed in BEC, hydrodynamics, polaritons, and mode locked lasers, but have been particularly relevant to the generation of chipscale microresonator-based frequency combs (microcombs), used in numerous system level applications in timing, spectroscopy, and communications. For microcombs, both bright…
Flat-top solitons and anomalous interactions in media with even-order dispersions and competing nonlinearities
本研究在具有偶次色散和竞争非线性作用的介质中构建了多种稳定平坦顶峰孤子，并揭示了其异常相互作用特性。
Existence and Switching Behavior of Bright and Dark Kerr Solitons in Whispering-Gallery Mode Resonators with Zero Group-Velocity Dispersion
利用广义Lugiato-Lefever模型研究了群速度色散为零时克尔光学频率梳的产生现象。在这种情况下，起主导作用的第一色散项是三阶色散。我们表明，这一项是足够的亮和暗孤子的存在。我们确定的区域中的参数空间中的两种孤子可以激发的谐振器内。我们还揭示了当泵浦光功率周期性变化时，这两种孤子之间的滞后切换现象。
Solitons and frequency combs in silica microring resonators: Interplay of the Raman and higher-order dispersion effects
研究了拉曼散射和高阶色散对石英微腔中孤子和频率梳产生的影响。喇曼效应在谐振腔品质因数中引入了一个阈值，超过该阈值，锁频孤子将不存在，而是观察到以产生自频移孤子和色散波为特征的丰富的动力学过程。本文还报道了锁频孤子的Hopf不稳定性导致切伦科夫辐射展宽的机制。
Closed-Loop Polarization Mode Dispersion Mitigation for Fibre-Optic Time and Frequency Transfer
针对光纤时间频率传递中的偏振模色散噪声，提出偏振切换脉冲交织闭环抑制方法，在30公里链路中将延迟变化降至20 fs以下，并指出双平衡相位检测方向。
Bright solitons in hybrid-dispersion photonic crystal microresonators
研究光学微谐振器中亮孤子特性因腔色散要求冲突的问题，通过引入局部强色散区域实现混合色散方案，在光子晶体微谐振器中揭示新孤子吸引子，调和相关冲突要求，展现非线性光子系统新特性实现潜力。
Dispersive wave emission from dark solitons in microresonator-based Kerr frequency combs
利用一个扩展的Lugiato-Lefever方程的三阶色散，我们数值计算表明，形成在正常色散的微谐振器的暗腔孤子能够发射色散波在正常和异常的色散区域，类似于常见的明亮的腔孤子的行为。产生的色散波可以准确地预测耗散辐射理论。此外，我们证明了在正常色散区的情况下，色散波是由存在三阶色散的暗孤子发射的克尔频率梳的稳定性增强。
We explore intrinsic thermal noise in soliton microcombs, revealing thermodynamic correlations induced by nonlinearity and group-velocity dispersion. A suitable dispersion design gives rise to control over thermal-noise transduction from the environment to a soliton microcomb. We present simulations with the Lugiato-Lefever equation (LLE), including temperature as a stochastic variable. By systematically tuning the dispersion, we suppress repetition-rate frequency fluctuations by up to 50 decibels for different LLE soliton solutions. In an experiment, we observe a measurement-system-limited 15…
Higher order mode suppression in high-Q anomalous dispersion SiN microresonators for temporal dissipative Kerr soliton formation
高Q氮化硅（SiN）微谐振器使光克尔频率梳产生的光子芯片上，最近已被证明支持完全相干梳的基础上的时间耗散克尔孤子的形成。为了形成亮孤子，需要在多模区操作SiN波导，以产生反常的群速度色散。由于不同模族之间的耦合避免了交叉，这可能导致色散的局部扰动，从而阻止孤子的形成。在这里，我们证明了高Q谐振器内部的单模“滤波”部分能够有效地抑制避免的交叉，同时保持高品质因数（Q~ 10 ^6）。我们通过在具有滤波段的SiN谐振腔中形成单孤子来演示这种方法。
Disturbance of Soliton Pulse Propagation from Higher-Order Dispersive Waveguides
光孤子脉冲在光通信系统中提供了许多应用，但根据定义，孤子仅受到二阶反常群速度色散;对于孤子脉冲的实际实现，高阶色散的理解是必要的。利用非线性薛定谔方程建立了波导的数值模型，并设定参数以保证输入脉冲能量等于基本孤子能量。高阶群速度色散逐渐增加，为各种时间宽度和波导色散。确定了基孤子脉冲在实际光子晶体波导中传输所需的最小脉冲宽度为100 fs。
The non-reciprocal and dynamic nature of polarization mode dispersion (PMD) in optical fibers can be a problem for accurate time and frequency transfer. Here a simple, passive solution is put forward that is based on transmitting optical pulses with alternating orthogonal polarization. The fast and deterministic polarization modulation means that the PMD noise is pushed far away from the frequencies of interest and upon reflection from a Faraday mirror at the receiver, the pulses have a well defined polarization when they return to the transmitter, which facilitates stable optical phase detect…
Internal polarization dynamics of vector dissipative-soliton-resonance pulses in normal dispersion fiber lasers
研究了锁模光纤激光器中矢量耗散孤子共振（DSR）脉冲的内偏振动力学。实验观察到了稳定的矢量DSR脉冲。利用波片分析器结构，我们发现在共振耗散孤子中偏振是不均匀的。具体地说，虽然中心平面波的共振耗散孤子获得几乎固定的偏振，前端的功能是不同的和空间变化的偏振态。当整个孤子结构随增益条件变化而扩展时，这种明显的偏振态分布仍然保持不变。数值模拟进一步证实了实验观察。
Temporal Kerr cavity solitons are pulses of light that can persist in coherently-driven, dispersive resonators with Kerr-type nonlinearity. It is widely accepted that such solitons react to parameter inhomogeneities by experiencing a temporal drift whose rate is governed by the gradient of the parameter at the soliton's position. This result, however, assumes that the gradient of the inhomogeneity is constant across the soliton, which may not hold true under all situations, e.g. when using bichromatic driving or in the presence of third-order dispersion that gives rise to an extended dispersiv…
Tapered Fibre Fabry-Pérot Cavities for the Generation of Near-Visible, Phase-locked, and Broadband Kerr Frequency Combs
本文利用锥形光纤法布里-珀罗腔实现近可见宽带Kerr频率梳，通过几何色散工程克服正常色散并增强非线性，实验和数值展示了多种相位锁定孤子结构，为可见光频率梳提供新平台。
In this paper we numerically study supercontinuum generation by pumping a silicon nitride waveguide, with two zero-dispersion wavelengths, with femtosecond pulses. The waveguide dispersion is designed so that the pump pulse is in the normal-dispersion regime. We show that because of self-phase modulation, the initial pulse broadens into the anomalous-dispersion regime, which is sandwiched between the two normal-dispersion regimes, and here a soliton is formed. The interaction of the soliton and the broadened pulse in the normal-dispersion regime causes additional spectral broadening through fo…
Octave-wide broadening of ultraviolet dispersive wave driven by soliton-splitting dynamics
本文揭示孤子分裂与色散波发射强耦合的新机制，通过高阶色散和自陡效应在紫外区高效产生相干色散波，并借助交叉相位调制实现200-400纳米倍频程展宽，为超快光谱和频率计量提供新光源。
Ultra-weak long-range interactions of solitons observed over astronomical distances
我们报告我们认为是有史以来观察到的最弱的孤子之间的相互作用。我们的实验涉及在相干驱动的无源光纤环形腔中再循环的时间光腔孤子。我们观察到两个孤立子，分离高达8,000倍的宽度，改变他们的时间间隔的一小部分阿秒每往返的100米长的谐振器，或相当于1/10,000的波长的孤立子载波的特征色散长度。这种相互作用是如此微弱，以至于在光速下，它们需要一个天文单位量级的有效传播距离才能完全发展，即数千万公里。这种相互作用是由传播孤子通过电致伸缩在光纤中产生的横向声波介导的。
The recent discovery of dissipative Kerr solitons in microresonators has facilitated the development of fully coherent, chip-scale frequency combs. In addition, dark soliton pulses have been observed in microresonators in the normal dispersion regime. Here, we report bound states of mutually trapped dark-bright soliton pairs in a microresonator. The soliton pairs are generated seeding two modes with opposite dispersion but with similar group velocities. One laser operating in the anomalous dispersion regime generates a bright soliton microcomb, while the other laser in the normal dispersion re…
Experimental and theoretical study of red-shifted solitonic resonant radiation in photonic crystal fibers and generation of radiation seeded Raman solitons
红移孤子共振辐射是发生在光子晶体光纤正常色散区的光脉冲穿过零色散波长时的一种有趣的相位匹配现象。这种相位匹配辐射的形成与任何光孤子的产生无关，主要受输入泵浦前沿的控制，而输入泵浦前沿形成了一个激波阵面。辐射产生的异常色散制度，并发现被限制在时域和频域。我们对这种辐射在光子晶体光纤中的形成进行了实验研究，并进行了详细的理论分析。我们的理论预测与实验结果吻合得很好。进一步，我们将研究扩展到长光纤，研究了红移孤子共振辐射和脉冲内拉曼散射（IPRS）之间的相互作用。观察到在反常色散区产生了一系列辐射种子拉曼孤子。
Unidirectional dissipative soliton operation in an-normal-dispersion bidirectional Yb-doped fiber laser without an isolator
在非线性偏振旋转锁模的全正常色散双向掺Yb光纤激光器中，我们演示了自启动的单向耗散孤子运转和类噪声脉冲运转。由于腔的方向非线性不对称性和非线性偏振旋转锁模机制，实现了激光器的单向一次锁模。
Ultrashort spatiotemporal optical solitons in quadratic nonlinear media: Generation of line and lump solitons from few-cycle input pulses
利用强约化微扰技术或多尺度分析，在慢变包络近似下，提出了控制飞秒时空光孤子在二次非线性介质中传输的一般Kadomtsev-Petviashvili演化方程.直接的数值模拟表明，形成，从适当选择的几个周期的输入脉冲，稳定的线孤子（在正常色散的二次介质的情况下）和稳定的块（二次介质与异常色散）。此外，还给出了一个二次非线性反常色散介质中扰动不稳定线孤子衰减为稳定块的典型例子。
Pure-Quartic Solitons
时间光孤子由于其独特的物理性质以及在超快光学和超连续谱产生中的应用，一直是人们研究的热点。传统的亮孤子是反常群速度色散和自相位调制共同作用的结果。在这里，我们报告发现了一个全新的一类亮孤子所产生的负四阶色散和自相位调制的相互作用，甚至可以发生正常的群速度色散。我们提供了基本的纯四次孤子的保形传输和平坦的时间相位和高阶纯四次孤子的周期调制传输的实验和数值证据。利用解析理论，我们得到了基本纯四次孤子的近似形状，与我们的实验观测结果非常吻合。我们的发现，由于光子晶体波导的独特色散，可以在通信和超快激光器中找到应用。
Evolution of dissipative-soliton-resonance (DSR) pulses in an all-normal-dispersion fiber laser with pump power under various operation conditions are experimentally studied. The fiber laser is mode-locked by using a nonlinear fiber loop mirror. Apart from the typical pulse broadening due to the peak power clamping effect, pulse breaking was observed. In addition, pulse narrowing with pump power increasing was observed. All the incompatible evolution of DSR pulses could be attributed to the multiple parameters change due to pump power increasing under specific operation conditions.
We theoretically and experimentally investigate the formation of dissipative coherent structures in Kerr nonlinear optical microresonators, whose integrated dispersion exceeds the free-spectral range. We demonstrate that the presence of any periodic modulation along the resonator's circumference, such as periodically varying dispersion, can excite higher-order comb structures. We explore the outcomes of coherent microcomb generation in both cases of anomalous and normal dispersion. We are able to access this regime in microresonators via the high peak power of synchronous pulse-driving. For so…
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