增益系数 meaning in English
gain coefficient
gain constant
gain factor
modulus of gain
Examples
- Studies indicated that image distance is independent of input intensity above a certain threshold and distance between modulate plane and input plane of media , but dependent on the gain coefficient and modulation size ; the intensity of the " hot image " is independent of modulation size and distance between modulate plane and input plane of media , but dependent on the intensity of input beam and the gain coefficient
研究表明，成像距离基本上与输入光束的强度和调制平面到介质入射面的距离没有关系，但是与介质的增益系数及调制细丝的尺寸有关； “热像”的强度与调制细丝的尺寸和调制平面到介质入射面的距离基本上没有关系，但是与输入光束的强度和增益系数有关。 - By examining the micro mechanism of photorefractive effect , we can find that an external dc electric - field can greatly alter ( improve or worsen ) the photorefractive properties of sbnrcr . so it is important to study electric - field effects in these materials . in this thesis , the characters of beam coupling and transmission in sbn : cr crystals under external dc electric - fields are investigated theoretically and experimentally
本文依据光折变非线性光学的光波耦合理论和传输理论，对sbn cr晶体在外加直流电场作用下的光波耦合特性和传输特性进行了理论分析和实验研究，主要内容包括： ( 1 )从理论上分析了外加直流电场对光折变二波耦合增益的影响，给出了sbn 60晶体的强度增益系数随外加电场变化的理论计算曲线。 - The approach of obtaining the guidance coefficients can be utilized in the situations in which more than four coefficients are hired for guidance to enhance the guidance performance . in addition , more precise earth model , which is non - spherical and will circle around its body axis , can be considered , and this will lead to more true results
最后，本文对进一步的工作提出了建议，认为可以考虑用四维以上的制导参数确定反馈增益系数以改善其制导性能，另外，可以进一步考虑地球旋转时影响飞船再入段纵程的因素，使得拟合结果更接近实际情况。 - This thesis was divided into eight chapters , and the main results and innovations obtained here can be summarized as follows : ( 1 ) the physics model of tsrs in frequency conversion crystals has been built up firstly . based on quantum - mechanical viewpoints and the following physical processes and parameters : the two - photo interaction of light with matter , paraxial diffraction of stokes , langevin noise sources , reflection at the faces and the edges of crystals , gain coefficient , beam aperture , pulse width and fluence of 3 , the physics model of tsrs in kdp and kdp crystals acting as high - fluence frequency convector and the paraxial operator maxwell - bloch - langevin equations have been built up
全文共分八章，取得的主要成果及创新点如下： ( 1 )首次建立了谐波转换晶体的tsrs物理模型本文根据量子力学原理，在考虑如下物理过程和参量的基础上：光与物质的双光子相互作用； stokes光的傍轴衍射； langevin (郎兹万)噪声源；晶体表面反射和端面反射；增益系数、光束口径、脉宽和三倍频光能量密度，推导出高通量激光在kdp和kd ~ * p谐波转换晶体中的tsrs物理模型和空间上的近轴算符maxwell - bloch - langevin方程组。 - Secondly , basing on the theory of on - off gain of small signal , the raman gain coefficient for frequency shift between 0 . 5 and 20 thz of standard sigle mode optical fiber is measured by pump - probe method through a super luminescent diode ( sld ) as a broadband small signal probe source . thirdly , numerical simulation analysis of gain characteristic of raman fiber amplifier for c band wdm signal light is made according to the raman gain coefficient of the fiber measured before through target and four rank runge - kutta method . at the invariability of wavelength and maximum power of each of two pumps , schematic of powers of two pumps for best flatness on c band wdm optical gain was found out , at the same time , the factors of resulting in gain saturation is analyzed , too
本文首先应用经典的电磁理论对拉曼光纤放大器的工作机制进行了分析，然后，根据小信号理论推导出的开关增益求出了光纤拉曼增益系数的表达式，采用泵浦-探测波的方法，利用超辐射激光二极管( superluminescentdiode简称sld )作为探测光源，测量了所用标准单模光纤频移为0 . 5 - 20thz的拉曼增益系数，之后根据所测得的光纤的拉曼增益系数谱对应用该类光纤构成的放大c波段wdm光信号的拉曼光纤放大器的增益特性采用打靶法和四阶龙格- - -库塔进行了数值计算，在给定了两个泵浦光源的波长和最大功率后，找出了反向泵浦情况下使c波段wdm光源增益最平坦的两个泵浦的各自最佳功率，同时也分析了导致信号光饱和的原因。