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Dynamics in Multimode Lasers and Their Applications

多模激光器动力学及其应用

基本信息

批准号：
07455040
负责人：
OTSUKA Kenju
金额：
$ 3.52万
依托单位：
Tokai University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

项目摘要

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

1.利用一种新的动态统计变量“环流”对全局耦合光学系统进行了动力学表征，并验证了其重要性质。该方法已应用于调制多模激光系统，并根据增益消失循环规律确定了其一般动态状态的物理来源，包括注入播种的因子动态模式记忆、分组混沌和协同同步混沌。在多模激光器腔内二次谐波产生模型下，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过渡过程中发现了混沌的流动，并证明了混沌力在失稳奇异吸引子废墟间随机切换的普遍性质。在高次谐波转换的情况下，用数值方法证明了聚类、分组、以多异位交叉为特征的自诱导开关和可控的动态部分。推导了反相位多模激光器中量子噪声功率谱的普遍关系，并用LNP激光器进行了实验验证。近共振次谐波扰动对混沌多模激光振荡的抑制已经在LNP激光器中得到了实验证明，并在理论上得到了再现。研究了激光二极管泵浦微芯片LNP多模激光器在多频调制作用下的非线性响应。发现了以模间参数共振为特征的聚类和呼吸运动。证明了调制信号模式与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”对半经典安全传输的适用性。在激光二极管泵浦微芯片LNP激光器中，研究了高密度泵浦对激光模式光谱的影响。证明了不同跃迁下的同时单频振荡、多模振荡的分解和低频反相不稳定性。基于含共振重吸收效应和俄歇复合过程的多跃迁振荡速率方程的分析再现了高密度激光的实验观测。动态不稳定性是由低态间的低频偏振相干引起的，这种相干是由种群捕获引起的。少