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population inversion中文是什么意思

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用"population inversion"造句"population inversion"怎么读"population inversion" in a sentence

中文翻译手机手机版

  • 粒子分布倒置
  • 粒子数布居反转
  • 粒子数反转

例句与用法

  • 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 rate equation formalism is used to develop the concepts of laser threshold , population inversion and modulation response
    比例方程式形式用来生成雷射临界点、能态数反转与调变反应的概念。
  • In the first part , the paper mainly discourse upon the gestation course of theoretic base in laser physics , stimulated emission , population inversion and other basic theory of laser were discussed
    第一部分主要论述了激光物理理论背景的酝酿过程，对受激辐射、负吸收、粒子数反转这几个激光物理的基本理论的建立过程作了研究和分析。
  • In chapter 3 , we studied the effect of gaussian transverse profile for the driving and laser fields on lasing without population inversion ( lwi ) in a closed v - type system and an open v - type system . moreover , we discussed also the effect of the unsaturated gain coefficient , the cavity - damping rate , the ratio of the atomic injection rates and atomic exit rate on the corresponding systems . in chapter 4 , we mainly discussed the effect of doppler broadening on the gain , dispersion and the frequency up - conversion of the open v - type lwi system and compared the differences and the same between the open system and the corresponding closed system
    发现： ( 1 )在考虑doppler展宽的情况下，通过选取合适的实验室条件(比如合适的原子环境温度等)可得到合适doppler展宽值，从而使系统获得最佳增益； ( 2 )要想实现系统的频率上转换，同时又要获得足够强的无反转激光增益，则系统频率转换比不能选取的太大； ( 3 )对于开放系统，比较小的粒子注入速率比与退出速率对产生无反转激光是有利硕士学位论文摘要的： （ 4 ）由于dopp1oy展宽的存在，当探测场与驱动场的传播方向相反时，增益在探测场失谐的某一段区域产生振荡，且振荡的振幅、频率失谐范围的大小与dopper展宽的取值有关。
  • The analyses given in this paper to quasi - three - level for 946 nm laser are complete . the relation between 946 nm laser transmission and optimal crystal length has been derived from the rate equations describing the population inversion and the photon density in the laser cavity in the steady - state case . the minimal claims to coating have been given on the base of contrasting 946 nm transmission with 1064 nm transmission in the condition of different cavity losses and how the pump beam radius in the laser crystal and optimal crystal length affect the laser threshold and output power of 946 nm laser has been given as well
    对产生946nm谱线的准三能级结构给出了较为完整的分析，利用激光谐振腔处于稳态时的速率方程，导出了准三能级nd ： yag946nm起振时，透射损耗与最佳激光晶体长度的关系，在与1064nm透射损耗相比较的基础上，给出了不同的腔损耗情况下的最低镀膜要求，并且给出了激光阈值、输出功率和最佳激光晶体长度及泵光光斑大小的关系，这为设计室温下高效运转的946nm激光器的提供了理论基础，这种分析方法对研究此类低增益，准三能级或三能级激光系统输出特性有借鉴意义。
  • The analytical solutions of the gain , dispersion and population difference in the steady state of an open ladder lasing without inversion ( lwi ) system are at first given when the phase fluctuation of the driving field is considered . then the effects of the driving field phase fluctuation on the gain , dispersion and population difference are analyzed by the numerical results from the analytical solutions . our research shows that the phase fluctuation of the driving field will results in a finite line width ; with the line width increasing , the gain decreases monotonously , however , variation of the dispersion isn ? t monotonous , it has a maximum value when the line width takes some value ; the line width varying can ? t lead to change lasing from without to with population inversion
    给出了有驱动场位相涨落的开放的梯型无粒子数反转激光( lwi )系统增益、色散和布居数差的定态解析解,进而用得到的数值计算结果分析了驱动场位相涨落对增益、色散和布居数差的影响.研究结果表明,驱动场位相涨落将导致有限线宽;随着线宽的增加,系统增益单调地减小,但系统色散的变化并不是单调的,当线宽取某个值时,色散有极大值;线宽的变化不能导致无反转激光向反转激光的转变
  • The intracavity photon density and initial population inversion density are assumed to be gaussian distributions instead of plan wave assumption , based on this assumption , the rate equations of diode - pumped intracavity - frequency - doubled passively q - switched laser are modified . through solving these space - dependent rate equations numerically , the results under different assumption are compared . 5
    将腔内光子密度和初始反转粒子数的平面波近似修正为高斯分布近似，独立地导出描述二极管泵浦内腔倍频-被动调q激光器的速率方程，并通过数值求解该方程比较了两种近似下脉冲特性的不同； 5 .实验验证了2中提出的实验方案，并对实验结果进行了分析。
  • The second part is about co2 lasers . we first discuss the mechanisms of population inversion , including excitations and relaxations ( electron collision excitation , resonance transition excitation impacted by excited n2 molecules , the relaxation of both the lower - upper laser levels and the lowest level of co2 )
    首先，讨论了二氧化碳激光粒子数的反转机理，包括电子碰撞激励、激发态n2分子等共振转换激励过程，激光上下能级co2 ( 00 1 ， 10 0 )以及最低能级co2 ( 0110 )的弛豫过程等几个方面
用"population inversion"造句  

百科解释

In physics, specifically statistical mechanics, a population inversion occurs when a system (such as a group of atoms or molecules) exists in a state with more members in an excited state than in lower energy states. The concept is of fundamental importance in laser science because the production of a population inversion is a necessary step in the workings of a standard laser.
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