population inversion

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。

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Using the latest parameter's data of Yb-Er co-doped Al2O3 films, the results show that Yb3+ co-doping can increase photoluminescence intensity and population inversion and lower the threshold power.

利用Yb-Er共掺Al2O3薄膜的相关数据进行模拟计算，结果显示Yb的掺杂可提高Er3+的荧光强度和反转粒子数，并使实现粒子数反转的阈值泵浦强度最大可降低一个数量级。

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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。

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The calculated threshold temperature is found to be in good agreement with the experimental laser-starting temperature, which indicates the resonance radiation trapping is a significant factor in establishing the population inversion of the resonance to metastable transition lasers.

发现计算得到的阈值温度与实验报道的开始产生激光的工作温度一致，表明共振辐射俘获效应是这类激光形成粒子数反转的一个重要机制。

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Quantum coherent and interference have led to many interesting and significative consequences such as coherent population transfer ( CPTR), coherent population trapping ( CPTP), amplification without population inversion ( AWI) and superluminal, etc.

量子相干和干涉产生了很多有趣而又有意义的结果，如相干布居迁移（CPTR），相干布居囚禁（CPTP），无反转放大（AWI），以及超光速（Superluminal）等等。

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Broadband population inversion in solid-state NMR

固态NMR中的宽带布居数反转

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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。

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