under modulated meaning in Chinese
欠调制的
Examples
- In succession , the theory of chirped - pulse amplifier system is given in detail , firstly , studying from designing experimental light road and optical components to theoretical analysis , we par ' tly finished the system by ourselves . about ultr a - shoft pulse with a pulse - width of 9 . 8f s and output power of 650mw and band - width of about l 20nm is output from oscillator source , secondiy , the stretching capacity of single grating four - pass stretcher is measured using abcd matrix combining collins function , and the effect of relativ e parameters to the streching ratio is also simulated . thirdly , a new type of disjunctional frequency moduiating function is provided according to the gain - narrowing and gain - saturation which are appeared in the co urse of amplification , under modulating the two effects are both controlled on some e xtent , fourthiy , the effect of ase that is often ignored by people is analyzed and the resolving methods are also given
从光路、光学元件的自行设计到理论分析计算，初步建立了一台实验系统；采用abcd矩阵法结合collins公式计算了四通式单光栅展宽器的展宽量，并模拟了相关参数对展宽比的影响，对实验具有指导意义；评价了再生放大器和多通放大器的优缺点，对放大过程中通常忽略的放大自发辐射现象（ ase ）进行了分析，并提出了相应的解决方法；针对放大过程中出现的增益窄化和增益饱和现象，对输入种子脉冲提出了一种新的分段频率调制函数，实现了对增益窄化效应和增益饱和效应的共同抑制；提出了系统的材料（包括放大介质和光路中的普通介质）正是融合高阶色散的来源。