In this paper we start from the rate equations describing a Q switched laser system with a saturable absorber and finally deduce the condition of this kind of Q switching which should be satisfied by the laser crystal population inversion.
本文从描述饱和吸收体调Ｑ的速率方程出发，推导实现有激发态吸收的饱和吸收体调Ｑ所需的反转粒子数理论上应满足的条件，并对其进行讨论与分析。
The condition of this kind of Q-switching which should be satisfied by the laser crystal population inversion is deduced.
从描述饱和吸收体调Q的速率方程出发，推导出了实现有激发态吸收的饱和吸收体调Q所需的反转粒子数理论上应满足的条件，并对其进行了讨论与分析，与参考文献的相关叙述相符。
The extraction efficiency and the distribution of population inversion in multi pass amplifier are calculated theoretically.
理论上计算了在多程放大过程中反转粒子数的利用效率、反转粒子数的分布等。
Based on boltzmann distribution law,thermodynamic scale of temperature is discussed of three level laser working matter system in negative temperature state,realized population inversion.
从玻耳兹曼发布律出发，对处于负温度状态（即实现粒子数反转）的三能级激光工作物质系统的热力学温度进行了讨论，指出在负温度状态下，粒子系统的热力学温度仍可以大于零，证明了负温度状态并不等同于热力学温度Ｔ＜０的状态。
94 μm, but only changes the relation between the population inversion of 4I 13/2 and 4I 15/2 levels and the concentration of Er 3+ ions.
６６μｍ波长激光粒子数反转，即Ｎ２（４Ｉ１３／２）＞Ｎ１（４Ｉ１５／２）与Ｅｒ３＋离子浓度的关系。
The evolution properties of the field entropy and the population inversion in an interacting system of a coherent superposition state and a two-level atom are studied and compared with that of the coherent superposition state formed by the coherent state and vacuum state.
研究了压缩相干态和真空态构成的相干叠加态光场与二能级原子相互作用系统中场熵的演化特性及粒子数反转效应,并与相干态和真空态构成的相干叠加态光场的场熵特性及粒子数反转效应进行了比较。
The laser amplication four-level atom system without inversion is studied.
对于小信号探测利用计算机给出吸收、增益曲线，并计算出无粒子数反转光放大的阈值条件。
By using the density matrix equations motion of the system,the conditions for realizing the probe fields gain without inversion in the system are discussed.
研究了三能级原子与多模光场相互作用的量子系统,从系统的密度矩阵运动方程出发讨论了无粒子数反转探测场的增益条件,发现当驱动场拉比频率取5,探测场拉比频率取1,非相干抽运取3,驱动场失谐量取3时,系统可以在偏离共振的两端获得粒子数无反转而相应的探测场获得了增益,即实现了无粒子数反转激光,其在光通信方面具有重要的应用价值。
The theoretical studies of the upper state population inversion ratio for erbium-doped tellurite-based fiber amplifier(EDTFA) are presented, and its distribution curves with the activated fiber length, each channel signal input power, bi-directional pumping power and erbium-doped concentration, respectively, are also obtained.
对宽带碲基掺铒光纤放大器(EDTFA)上能级粒子数反转比进行了理论研究,得到了碲基掺铒光纤 放大器上能级粒子数反转比随着光纤激活长度、信号输入功率、泵浦功率和纤芯掺杂浓度的演变关系,分析了 上能级粒子数反转比分布与EDTFA信号增益间的关系。
In the strong driving field approximation,we discussed the conditions for realizing noninversion lasing in an open V type three level system.
在强驱动场近似下讨论了开放的Ｖ型三能级系统中实现无粒子数反转激光的条件，分析了系统增益大小跟驱动场Ｒａｂｉ频率，自发衰减率，原子注入速率比以及原子与探测激光场相互作用后从腔中排出速率之间的关
threshold population inversion density
临界粒子数反转密度
The Study of Lasing Without Inversion in an Open V-Type System;
开放的V型无粒子数反转激光系统的理论研究
The necessary population inversion can be achieved in a variety of ways.
我们可以用各种方法来实现这种必要的粒子数反转。
The Theoretical Study of Lasing without Inversion in an Open Three Level Ladder-Type System;
开放的Ladder型三能级无粒子数反转激光系统的理论研究
The Theoretical Study of Lasing Without Inversion in an Open Four-level System;
开放的四能级无粒子数反转激光系统的理论研究
A New Physical Interpret of Function Ψ of Antiparticle and Klein-Gordon Equation;
反粒子与Klein-Gordon方程Ψ函数的物理意义
DETERMINATION OF THE OPTICAL CONSTANTS OF NON-SPHERICAL PARTICLES
反演非球形粒子光学常数的理论建模
Inverse Analysis of Mechanical Parameters of Dam based on PSO
基于粒子群算法的大坝力学参数反演
The antiparticle of a nucleon.
反核子核子的反粒子
The antiparticle of the neutron.
反中子中子的反粒子
The antiparticle of the proton.
反质子质子的反粒子
The antiparticle of a baryon.
反重子重子的反粒子
Particles, such as electrons, requiring antisymmetric wave functions are called fermions.
要求反对称波函数的粒子，如电子，叫做费米子。
The most common method to "pump" a gas laser-that is, to invert the population in the states that give rise to light amplification-is to use a gas discharge.
“发射”气体激光（也就是反转能产生光放大的那些状态的粒子数）的最普通方法是运用气体放电。
Time Reversal Symmetry and Discrete Rotation Symmetry in Magnetic Particles
磁性粒子的时间反演对称性和旋转对称性效应
Simulation of emulsification and wettability alteration phenomena with dissipative particle dynamics
乳化和润湿反转现象的耗散粒子动力学研究
DETERMINATION OF THE OPTICAL CONSTANTS OF HIGH TEMPERATURE MONODISPERSE PARTICLES
反演高温均一粒子系光学常数理论建模
The antiparticle of the electron.
阳电子电子的反粒子