pumping threshold

The results show that there is a fixed threshold Xat for the relative pumping parameter Xa of the upper laser level;

结果表明：激光上能级相对泵浦参量Xa具有一个确定的阈值Xat；

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The threshold pumping power is 3.5 W and pulse duration is 50 ns. The slope efficiency is as high as 20%.

激光输出模式为稳定的单纵模，抽运阈值功率为35W，脉冲宽度为50ns，斜率效率高达20%。

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The power distribution of pumping light and signal light in fiber, fiber length, rear cavity mirror reflectivity, threshold power, doping concentration and pump geometry which can influence the characteristic of the fiber laser are deeply investigated in the MATLAB simulation environment. 3.

在MATLAB仿真环境中，进一步分析泵浦光和信号光功率分布、光纤长度、后腔镜反射率、阈值功率、掺杂浓度以及泵浦结构对输出功率的影响。

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Effects of overlapping factors on the gain and pumping threshold power are discussed in detail.

详细讨论了重迭因子对增益、泵浦阈值功率的影响。

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In this paper, the model which consists of homogeneous broadened three atomic level is proposed, when both the pump classical field and laser field exist we discuss the gain, frequency pulling and threshold condition of the weak pumping.

本文给出一均匀增宽的三能级原子模型，在泵浦场和激光场同时存在时，讨论了双光子激光的增益、频率位移及弱泵浦时，稳态运转的阈值条件。

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The four-energy-level velocity rate equation is illustrated and so is the expression of threshold power. The laser power on the condition of near-threshhold and powerful pumping is estimated.

由钕离子的四能级跃迁的速率方程理论，推出了阈值功率的表达式，并且对近阈值条件下和强泵浦条件下的激光输出功率做了理论预测；

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The threshold pumping power of the laser is 5.2 mW.

激光器的阈值泵浦功率为5.2mW。

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The relationship between multimode pumping power threshold and fiber length has been obtained according to this model. When the threshold pumping power reaches its minimum, the cavity length of fiber laser is then optimized.

由模型可以求出多模泵浦功率阑值与光纤长度的关系，当泵浦功率闽值最小时，对应的光纤长度为最佳光纤激光器的腔长。

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By numerical simulation we calculate the threshold satisfied by pumping rate r and damping c, and discuss the influence of cavity loss on the steady photon distribution and the mean photon number.

通过数值模拟给出了有损耗情形注入率r与腔损耗系数c之间应满足的阈值条件，并讨论了不同腔损耗对稳态光子数分布和平均光子数的影响。

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Measurement results of the dependence of the pulse width of the mode-locked pulses, the stability range of laser for stationary single-pulse operation and the threshold pumping power on the concentration of the absorber dye are given.

提供锁模脉冲宽度、激光器以稳定单脉冲工作的稳定性范围和阈值泵浦功率等，对吸收体染料浓度依赖关系的测试结果。

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Under weaker pumping conditions stimulated thermal Rayleigh scattering would loss weaker phase information in original wavefront as same as stimulated Brillouin scattering did due to threshold effect;

由于阈值效应，弱抽运时受激热瑞利散射与受激布里渊散射一样将丢失原始波前中较弱的相位信息；

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