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钛扩散铌酸锂矩形波导中的双折射耦合对传播常数的影响
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作者 李登峰 祖小涛 +1 位作者 邱怡申 董会宁 《强激光与粒子束》 EI CAS CSCD 北大核心 2006年第10期1702-1706,共5页
从亥姆霍兹方程出发,得到了各向异性光波导在弱导近似下的耦合模理论。耦合系数包括偏振耦合项和双折射耦合项。并用马卡提里近似下的模式作为零级近似。用一级微扰法计算了折射率渐变分布的钛扩散铌酸锂矩形波导的传播常数。在给定参... 从亥姆霍兹方程出发,得到了各向异性光波导在弱导近似下的耦合模理论。耦合系数包括偏振耦合项和双折射耦合项。并用马卡提里近似下的模式作为零级近似。用一级微扰法计算了折射率渐变分布的钛扩散铌酸锂矩形波导的传播常数。在给定参数的情况下,得到双折射项引起的传播常数的改变约为主微扰项的3%,因此双折射耦合对钛扩散铌酸锂矩形波导的性能影响不可忽略,这对设计和分析与它相关的光波导器件具有指导意义。 展开更多
关键词 导波光学 钛扩散铌酸锂矩形波导 双折射耦合 传播常数
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非线性双折射脉冲耦合特性及应用
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作者 罗一平 《浙江工程学院学报》 2003年第3期210-212,共3页
根据耦合NLS方程,研究了线性极化条件下,光纤双折射非线性耦合特性,由此提出光孤子开关原理。研究了孤子开关工作的可靠性和稳定性问题,并提出了解决问题的方法。根据NLS方程,引入相移器,相移量多少由控制脉冲决定,并允许光纤相位在较... 根据耦合NLS方程,研究了线性极化条件下,光纤双折射非线性耦合特性,由此提出光孤子开关原理。研究了孤子开关工作的可靠性和稳定性问题,并提出了解决问题的方法。根据NLS方程,引入相移器,相移量多少由控制脉冲决定,并允许光纤相位在较大范围内变化。相位满足相消条件,控制脉冲与信号脉冲合并时刚好反相抵消,使孤子开关的工作可靠性和稳定性得到提高。 展开更多
关键词 光纤通信 双折射脉冲耦合特性 耦合NLS方程 光孤子开关
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The Lone Pair Electrons in Post-Transition Metal and Their Contribution to Optical Response
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作者 WANG Jialong ZHANG Ruixin +3 位作者 CUI Xiuhua CHEN Zhaohui JING Qun DUAN Haiming 《新疆大学学报(自然科学版中英文)》 CAS 2024年第5期579-590,共12页
The stereochemically active lone pairs around post-transition metal atoms play an important role in determining distorted lattice structure and optical response.The lone pair electrons are characterized by crystal orb... The stereochemically active lone pairs around post-transition metal atoms play an important role in determining distorted lattice structure and optical response.The lone pair electrons are characterized by crystal orbitals,electron localization function(ELF)and partial density of states(PDOS).Birefringence is evaluated by means of a Born effective charge approach based on modern polarization theory.The origin of the different responses of birefringence and second-harmonic generation(SHG)is explored,as well as the effect of spin-orbit coupling(SOC)on the band structure and optical properties is explored.The study of this paper can help to deeply understand the lone pairs and their contribution to optical property. 展开更多
关键词 lone pair electrons BIREFRINGENCE second-harmonic generation response spin-orbit coupling FIRST-PRINCIPLES
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Exact Soliton Solutions for the (2+1)-Dimensional Coupled Higher-Order Nonlinear Schr¨odinger Equations in Birefringent Optical-Fiber Communication 被引量:1
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作者 蔡跃进 白成林 罗清龙 《Communications in Theoretical Physics》 SCIE CAS CSCD 2017年第3期273-279,共7页
In birefringent optical fibers, the propagation of femtosecond soliton pulses is described by coupled higherorder nonlinear Schrodinger equations. In this paper, we will investigate the bright and dark soliton solutio... In birefringent optical fibers, the propagation of femtosecond soliton pulses is described by coupled higherorder nonlinear Schrodinger equations. In this paper, we will investigate the bright and dark soliton solutions of(2+1)-dimensional coupled higher-order nonlinear Schrodinger equations, with the aid of symbolic computation and the Hirota method. On the basis of soliton solutions, we test and discuss the interactions graphically between the solitons in the x-z, x-t, and z-t planes. 展开更多
关键词 (2+1)-dimensional coupled higher-order nonlinear SchrSdinger equations soliton solutions symbolic computation Hirota method interactions
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Mode splitting of a cavity with a high-density birefringence rubidium vapor in the superstrong coupling regime
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作者 CHEN LiangChao YU XuDong +1 位作者 MENG ZengMing ZHANG Jing 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2014年第7期1283-1288,共6页
The mode splitting in a system with Doppler-broadened high-density two-level atoms in the presence of magnetic field inside a relatively long optical cavity is studied in the superstrong coupling regime(atoms-cavity c... The mode splitting in a system with Doppler-broadened high-density two-level atoms in the presence of magnetic field inside a relatively long optical cavity is studied in the superstrong coupling regime(atoms-cavity coupling strength g√N is near or larger than the cavity free-spectral range?FSR).The effect of a magnetic field applied along the quantization axis is used to break the polarization degeneracy of the cavity and thereby introduce birefringence(or Faraday rotation)into the medium.The cavity modes are further split in the presence of the magnetic field compared with the normal case of the multi-normal-mode splitting of the two-level system near the D2 line of87Rb.The dependence of the mode splitting on the magnetic field and the temperature is studied.The theoretical analysis according to the linear dispersion theory can provide a good explanation. 展开更多
关键词 superstrong coupling normal-mode splitting Zeeman effect BIREFRINGENCE
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