1) Phase multiply method
相位匹配法
1.
Phase multiply method which is created to reduce voltage stepping rounding error means a process which is useing the periodicity of interferograms to find the best phase shifting step.
本文提出的相位匹配法是指针对数字电压源的输出电压的舍入误差,利用干涉图的周期性,选择在确定测试腔长下相位步进误差最小时的相位步进采集干涉图的方法。
2) matched-signal phase method
信号相位匹配法
1.
Principles of matched-signal phase method of noise and space correlative interference cancellation are presented by using three-sensor array and multi-sensor array in this thesis.
本文推导了利用三元传感器阵及多元传感器阵抵消噪声和空间相关干扰的信号相位匹配法的原理,给出了噪声和干扰抵消后提取信号的表达式,并对该原理进行了仿真。
3) phase-matching
相位匹配
1.
A difforent frequency generation of nonlinear optical crystals of AgGaSe_2 and AgGaS_2 has been analyzed based on the three-wave coupled equation and energy consesrvation in the phase-matching of type-Ⅰand type-Ⅱ.
经过数值模拟计算,得到了在Ⅰ类和Ⅱ类相位匹配条件下,泵浦波长分别取不同值时差频调谐波长与调谐角度的理论曲线。
2.
Based on the calculation and discussion on the phase-matching,walk-off angle,acceptance angle and effective nonlinear coefficient for the KTP crystal,and on the numerical simulations of the angle-tuning curve and gain curve,the tuning spectrum and cutting angle of the KTP was finally established as 1.
讨论了KTP-OPO的相位匹配,计算了KTP的走离角、允许角和有效非线性系数,数值模拟了角度调谐曲线和增益曲线,从而确定了调谐范围为1。
3.
Energy conversion process and spatial distribution of forward-propagating signal wave and backward-propagating wave of sum frequency under phase-matching condition were investigated.
基于电磁场理论,推导了无耗非线性左手材料中三波耦合的波混合方程,并研究了相位匹配条件下正向信号波与逆向和频波的能量转换过程及其空间分布。
4) phase match
相位匹配
1.
The principles of laser frequency transformation and the theory of phase matching in nonlinear optic crystals are also discussed.
在总结激光频率变换的原理和非线性光学晶体的相位匹配理论的基础上，可以根据相位匹配理论进行晶体的相位匹配角的计算。
5) Phase matching
位相匹配
1.
We have realized the phase matching of optical parametric oscillator in KTP crystal pumped by doubled YAG laser in the quasi-degenerate region theoretically and obtained the condition of interactions of Type Ⅱ (A) and Type Ⅱ (B) in KTP in this region.
从理论上研究了近简并区内倍频YAG激光(532nm)泵浦KTP晶体光参量振荡器位相匹配的实现。
2.
A numerical analysis method used for calculating phase matching with the parametric effect is put forward, the phase mismatching from the material and waveguide dispersion of the fiber in the parametric effect is calculated by the numeric method and the spatial curvature surfaces of phase mismatching Changed with both pump light wavelength and frequency shift between the pu.
研究了几种掺杂情况下光纤折射率的变化导致光纤零色散波长的变化，提出一种用于参量过程中位相匹配的数值分析方法，对光纤中材料色散与波导色散引起的参量过程中的位相失配进行了数值分析，给出相应的随泵浦波长和泵浦与信号间的频移而变化的位相失配空间曲面，结果表明，在零色散波长附近有最大的频移可满足位相匹配，且此规律不随零色散波长移动而发生变
6) phase match
位相匹配
1.
Influence of phase match between input signal and CCD pixel on the MTF;
输入信号与CCD像元位相匹配对调制传递函数的影响
2.
With the definition of the contrast transfer function (CTF), the modulation transfer function (MTF) mathematics-theory relationship of line-array fiber-optics image bundles was established, the influence of phase match between input signal and line-array fiber-optic image bundles on the modulation transfer function was carried out by digital analysis, and the study of experiment was working.
结果表明,输入信号与线列光纤传像束的位相匹配对调制传递函数有一定的影响。
3.
The next, the influence of phase match between input signal and line-array fiber-optic image bundles on the contrast transfer function was analysed digitally.
其次，采用数值计算的方式，分析了输入方波信号与光纤束位相匹配对对比度调制传递函数的影响。
补充资料：相位
相位
Phase
相位(phase)从任意时间原点算起，在某一时刻所测到的一┌───┐│\/ │├───┤│ \/ ││/叹丁 │├───┤│又/ │└───┘时间一)正弦波的相位意义图解。在波动l与波动2间的相位差护称为相角.对于每一波，A为振幅，T为周期个周期的一部分称为相位，经过这部分一种周期量(诸如交变电流、振动等)的时间变量已经变动，在正弦式变化的量的情况下，通常假定时间原点为该量从负方向到正方向通过零点时的时刻。习惯上总是选择时间原点使时间的分数那一部分小于1周期。 在比较两个随时间变化的量在给定时刻的相位关系时，通常假定其中一个量的相位为零，而另一个量的相对于第一个量的相可以用一个周期的一部分(即第二个量要变化到它本身的零值所必须经历的时间)来描述(参见图解)。在这一情况下，周期的一部分通常以角度来表达，即一个周期等于3600或2，弧度，因此在两个具有某一给定频率的正弦波中，如果第二个波相对于第一个波在时间上必须移动l/4周期，才能达到一零值，那么这两个波就被说成是90“或二/2弧度异相。参阅“正弦波”(s inewave)条。 [加洛韦(W.J.Galloway)撰〕
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条