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   average population inversion 的翻译结果: 查询用时:0.184秒
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average population inversion
相关语句
  平均粒子数反转
     Based on the properties of Fokker-Planck equation the average population inversion as a function of time and interaction is formulated,
     利用Fokker-Planck方程的性质求出了平均粒子数反转随时间和相互作用变化的显函数.
短句来源
     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.
短句来源
  相似匹配句对
     in average;
     平均为0.89d。
短句来源
     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。
短句来源
     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。
短句来源
     The ratio of population inversion is 0.44.
     得到粒子数的反转比为0.44。
短句来源
     INVESTIGATION OF POPULATION INVERSIONS BY AVERAGE ATOM MODEL
     用平均原子模型研究粒子数反转
短句来源
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In this paper, the Fokker-Planck equation for N three-level molecules having two transition frequencies is derived by operator ordering method. By the equation, the complex distribution function P of three-level, dual frequency system is determined. The expression for P solution is obtained by solving the characteristic equation. Based on the properties of Fokker-Planck equation the average population inversion as a function of time and interaction is formulated,

本文用编序算符方法推导出了具有两个跃迁频率的N个三能级分子的Fokker-Planck方程.三能级双频系统的缔合分布函数P_ζ由这一方程确定.用特征方程方法解出了P_ζ的表达式.利用Fokker-Planck方程的性质求出了平均粒子数反转随时间和相互作用变化的显函数.

Erbium-doped hole-assisted lightguide fiber (EDHALF) is composed of a high-index core doped with erbium, a low index cladding and a small number of air holes surrounding the core. The finite element method is applied for solving the modal field of the EDHALF. The numerical calculation methods of the cutoff wavelength and mode field diameter are described in detail. The modified average population inversion iteration method is proposed for calculating the gain and noise figure of erbium-doped fiber amplifiers....

Erbium-doped hole-assisted lightguide fiber (EDHALF) is composed of a high-index core doped with erbium, a low index cladding and a small number of air holes surrounding the core. The finite element method is applied for solving the modal field of the EDHALF. The numerical calculation methods of the cutoff wavelength and mode field diameter are described in detail. The modified average population inversion iteration method is proposed for calculating the gain and noise figure of erbium-doped fiber amplifiers. The effects of the air holes on EDHALFs' cutoff wavelengths, mode field diameters and the gain coefficients of fiber amplifiers are studied. It's found that decreasing the relative hole-to-core spacing can make the cutoff wavelength move to shorter wavelength and decrease the mode field diameter. When the relative size of air holes is relatively large, further enlarging it only slightly changes the cutoff wavelength, mode field diameter and the maximum of the gain coefficient. Finally, four structural parameters, namely the EDHALF-core radius, the refractive index difference between the core and cladding, the relative hole-to-core spacing and the relative size of air holes are optimized in terms of the design criteria, which take into account the cutoff wavelengths of fundamental mode and the second order mode, the gain and noise figure of fiber amplifiers and the splice loss between the EDHALF and the conventional single-mode fiber.

掺铒孔辅助导光光纤是由掺铒的高折射率纤芯、低折射率包层和少量的空气孔组成.采用有限元法分析了掺铒孔辅助导光光纤的模式特性;给出了数值计算截止波长和模场直径的方法;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.研究空气孔对掺铒孔辅助导光光纤的截止波长、模场直径和放大器的增益系数的影响.发现:减小相对孔芯距的值,可使截止波长向短波长移动,减小模场直径的值;当孔的相对大小较大时,截止波长、模场直径和增益的最大值基本上不随孔的相对大小的增大而改变.最后,综合考虑掺铒光纤基模和二阶模的截止波长、与普通单模光纤的熔接损耗、放大器的增益和噪声系数等因素,优化设计了掺铒孔辅助导光光纤的四个结构参量——纤芯半径、纤芯与包层的折射率差、相对孔芯距和孔的相对大小.

 
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