Population inversion

Population inversion of the central transition of spin-3 / 2 nuclear systems in powder samples

粉末样品中自旋3/2核体系中心跃迁的布居数反转

It is found that the collapse and revival phenomena of the atomic population inversion will disappear as the frequency changing with time in sine form ;

研究发现：当场频率随时间作正弦变化时，原子布居数反转的崩塌和回复现象将消失；

And the performance of population inversion of the composite 180 ?

并且用数值计算方法对该组合180°脉冲的布居数反转效果进行了分析。

Progress in the Investigation on Light Amplification without Population Inversion

无粒子数反转光放大的研究

The Preliminary Explore of Population Inversion and Spatial Homing Based on GIS

基于GIS的人口反演及空间归位初探

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 possible mechanisms of population inversion under the average high temperature condition has been analysed .

分析了可能导致高温条件下粒子数反转的机制。

The ratio of population inversion is 0.44 .

得到粒子数的反转比为0.44。

Fluorescence Measuring Method of Population Inversion of Nd : Glass Laser Amplifer

钕玻璃激光放大器反转粒子数的荧光测定法

Analysis of full quantum mechanism on possibility for realization of optical gain without population inversion in semiconductor

从全量子理论看在半导体中实现无反转增益的一个可能方案

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。

High soft X-ray population inversion observed in a laser-irradiated micro-tube

激光加热微管靶在软X射线波段观察很高的粒子数反转

Population Inversion of a Trapped Ion in Travelling-Wave Laser

行波激光场中囚禁离子的布居反转

The Population Inversion Analysis of a Saturable Absorber Q-Switch

饱和吸收体调Q的反转粒子数分析

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。

The population inversion and the trigger input must exceed certain thresholds to operate a two-photon laser .

双光子激光器必须有高于阈值的集居数反转和起动的触发脉冲。

After solving the time-dependent states of this model , we study the evolution of population inversion for the ion numerically .

通过求解这一模型的系统状态随时间变化，数值研究了离子布居数反转的演化规律。

Soft X-ray population inversion of Na XI levels by inter-combination line resonant photoexcitation

互组合线共振光激发NaXI离子的粒子数反转研究

Broadband population inversion in solid-state NMR

固态NMR中的宽带布居数反转

In this paper We use the rate equations for hydrogenlike ions to calculate population inversion for optically thin materials .

本文用类氢离子速率方程计算高度电离条件下光学薄介质粒子数反转。

The modified average population inversion iteration method is proposed for calculating the gain and noise figure of erbium-doped fiber amplifiers .

提出了改进的平均粒子数反转度迭代算法来数值计算掺铒光纤放大器的增益和噪声系数。

A study on " water window " range 2p-3d population inversion of He-like AI ions X-ray laser

水窗波段类氦Al离子2p-3dX射线激光的粒子数反转研究

We also present an infrared generation mechanism without population inversion between subbands in quantum well , superlattice and quantum dot lasers .

还提出了一种在非粒子反转条件下量子阱、超晶格和量子点激光器的红外发射机制。

Population inversion between Ar ~ + 4p and 4s levels in HCD of pure argon

纯氩空心阴极放电中Ar~+4p-4s态的粒子数反转

A three level Λ type atomic system is pumped by an incoherent radiation field and the system lases without population inversion in steady state .

三能级∧－型原子系统被非相干辐射场泵浦，系统处于稳态时产生无反转激光。

A Composite 180 ° pulse ( Indicated by Rx ( 180 ) ) for the population inversion in solid state NMR systems is presented .

本文提出了一个固态NMR体系中的组合180°脉冲Rx（180°），用于宽带布居数反转。

Chemical laser is characteristically energized by an exoergic chemical reaction which produces the necessary population inversion of lasing species .

化学激光器是以释能化学反应提供能源，并且以化学反应产生粒子数反转为基础的。

Numerical simulations have showed the temporal evolutions of the population inversion in laser crystal and the intracavity photon by solving the rate equations .

通过求解速率方程组对激光介质反转粒子数、腔内光子数随时间的变化进行了数值模拟。

And the frequency varying in impulse form can lead to some new collapses and new revivals in the evolution of the atomic population inversion .

当场频率随时间作脉冲变化时，布居数反转随时间的演化将诱发出新的崩塌和回复过程。

The theoretical results shows that both the rise of temperature and the rapid reduction of the desity of electrons can affect population inversion density and its area .

结果发现：电子温度的上升和自由电子密度的快速衰减都会影响体系粒子数反转的峰值和发生的区域。