phase mismatch meaning in English
相位失配
Examples
- For the technology of butting laser to a fiber , the coupling efficiency is very low for the serious phase mismatch and mold field diameter mismatch . so it is necessary to minimize the mismatch
如果用平端光纤直接与ld耦合，由于严重的相位和模场半径不匹配，耦合效率很低，仅10左右。 - We also use fourth runge - kutta method simulate the opcpa process in the case of considering signal and pump temporal profile and phase mismatching and get gain and spectra properties at different pump temporal profile
我们还在考虑时间波形和相位失配的情况下，利用四阶龙格-库塔法对光参量啁啾脉冲放大进行了数值模拟计算，得到了不同泵浦光时间波形时的增益与频谱特性。 - Therefore , for 980nm pumping , a significant disadvantage is the low coupling efficiency to the single mode fiber because of the mold field mismatch between the elliptical laser beam and the circularly symmetrical fiber mode and also because of the phase mismatch
但是对于像980nm泵浦激光器发出的激光来说，由于特殊的物理结构，使得激光光束具有高度的椭圆性。对于椭圆度高的激光光束和单模光纤耦合的报道不是很多。 - We analyze the generation of external cavity frequency - doubling with knbo3 crystal theoretically . in order to get the second - order nonlinear conversion from 858nm to 429nm with knbo3 , we use non - critical type - i phase - matching to avoid the walk - off effect the corresponding optimum focusing condition is as followings : double refraction parameter b = 0 , focus parameter = 2 . 84 , optimum phase mismatch parameter = 0 . 574 . based on the theoretical analysis and numerical calculations , we obtain the ideal nonlinear conversion coefficient about 1 . 45 % / w with crystal length of 7mm and 2 . 07 % / w with crystal length of 10mm at the phase - matching temperature around 23 . 50c
根据对其倍频原理及性能的分析讨论，在用该晶体完成波长从858nm到429nm的二阶非线性转换时，采用非临界相位匹配条件(此时无离散效应，对应的双折射参数b = 0 ，共焦长度为= 2 . 84 ，最佳相位失配因子为= 0 . 574 ) ，在相位匹配温度约为23 . 5时，理论上通过计算得到理想情况下非线性转换系数约为1 . 45 / w (长度为7mm ) ， 2 . 07 / w (长度为10mm ) 。 - Abstract : temporal properties of the second - ordre process with a chirped incident pulse are theoretically calculated . the chirp influences the irradiance and the pulse shape of the second harmonic wave with large phase mismatch . the phase distortion of all three waves is dependent more strongly on the chirp than on the phase mismatch
文摘:讨论了在大相位失谐下,基波为频率啁啾脉冲的二次谐波产生过程,结果表明选取合适的啁啾参量可以使二次谐波的光强提高,但同时会使其波形和相位发生变化.三波相位的畸变主要取决于入射的基波啁啾脉冲,而与相位匹配的失谐量关系不大