Dynamics in Multimode Lasers and Their Applications

1.利用一种新的动态统计变量“循环”对全局耦合光学系统进行了动力学表征，并验证了它的显著性质。将这种方法应用于调制多模激光系统，根据零增益循环定律，确定了它们一般动力学状态的物理起源，包括通过注入种子的阶乘动态图案记忆、分组混沌和协同同步混沌。2.在多模激光器腔内二次谐波产生的模型下，研究了全局耦合光学系统的反相位动力学。在从局部混沌到全局混沌的转变过程中，发现了混沌巡游现象，并证明了其在失稳奇异吸引子的废墟中通过内部产生的混沌力进行随机切换的普遍性质。群集、分组、具有多个异位杂交特征的自诱导切换和受控动态PAT…在高转换为二次谐波的情况下，更多的TERN世代涉及到阶乘数目的共存图案被数值演示。从理论上推导了反相多模激光器量子噪声功率谱的普适关系式，并用LNP激光器进行了实验验证。3.在LNP激光器中实验证明了近共振次谐波微扰对混沌多模激光振荡的抑制作用，并在理论上得到了再现。研究了激光二极管泵浦的微片LNP多模激光器在倍频调制下的非线性响应。发现了具有模式间参数共振特征的聚集和呼吸运动。证明了调制信号模式和总输出功率谱模式之间的简单对应关系，并提出了这种复杂系统的合作线性响应在半经典保密传输中的适用性。4.研究了激光二极管泵浦的微片LNP激光器中高密度泵浦对激光模谱的影响。证明了不同相变上的单频同步振荡、多模振荡的破裂和低频反相不稳定性。基于多跃迁振荡速率方程，分析了高密度激光的共振重吸收效应和俄歇复合过程，再现了实验观测。动态不稳定性被证明是由于低态之间的低频极化相干引起的，这是由布居陷阱造成的。较少

1.Dynamical characterization of globally coupled optical systems is carried out by a novel dynamic statistical variable of "circulations" and its significant property is verified. This methology has been applied to modulated multimode laser systems and the physical origin of their generic dynamical states including factorial dynamic pattern memory by injection seeding, grouping chaos and cooperatively synchronized chaos has been identified in terms of vanishing gain circulation law.2.Antiphase dynamics in globally coupled optical systems are investigated in the model of intracavity second-harmonic generation in multimode lasers. Chaotic itinerancy has been found in the transition process from local chaos to global chaos and its universal property of random switching among ruins of destabilized strange attractor by an internally generated chaotic force has been demonstrated. Clustering, grouping, self-induced switching featuring multiple heteroclinic crossing, and controlled dynamic pat … More tern generations involving a factorial number of coexisting patterns are demonstrated numerically in the regime of high conversion to second-harmonic. Universal relation in quantum noise power spectra in antiphase multimode lasers has been derived analytically and demonstrated experimentally using LNP lasers.3.Suppression of chaotic multimode laser oscillations by nearly-resonant subharmonic perturbation has been demonstrated experimentally in LNP lasers and reproduced theoretically. A nonlinear response of laser-diode-pumped michrochip LNP multimode lasers that is subjected to multiplefrequency modulations is investigated. Clustering and breathing motions featuring intermode parametric resonances are found. A simple correspondence between the modulation signal patterns and the total-output power-spectrum patterns is demonstrated and applicability of such a cooperative "linear-response" of complex systems to semiclassical secure transmissions has been proposed.4.The effect of high-density pumping on lasing mode spectra is investigated in a laser-diode-pumped microchip LNP laser. Simultaneous single frequency oscillations on different transitions, breakup of multimode oscillations and low frequency antiphase instabilities are demonstrated. Analyzes based on multitransition oscillation rate equations including resonant reabsorption effect and Auger recombination process in high Nd density lasers reproduced experimental observations. Dynamic instabilities have been shown to arise from low frequency polarization coherence among lower states which is created by population trapping. Less