1) atmospheric coherent time
大气相干时间
2) coherence time
相干时间
1.
The coherence time measurement of laser pulse was studied by using counter running pump probe technique in two photon absorption materials.
研究了利用反向泵浦－探测双光子吸收材料的方法来测量脉冲激光的相干时间，并测量量了２３ｐｓ、５３２ｎｍＮｄＹＡＧ激光脉冲的相干时间。
2.
The design of air-ground communication can be affected by the elevation angle of antenna of ground station and the parameters including the condition of multi-path fading,distribution of multi-path delay,fading rate and coherence time etc.
地空信道中引入的多径衰落情况、多径时延的分布、衰落速率、相干时间等参数以及地面站天线仰角等均会直接影响地空通信系统设计,为达到平稳传输效果,在系统设计之初,必须对相应的信道特征有比较明确的了解,以便采取相应的抗多径、抗遮挡措施。
3) temporal coherence
时间相干性
1.
The influence of light source dimension on spatial coherence and spectrum on temporal coherence was separately discussed by Young s interference experiment.
通过杨氏双缝干涉实验,分别讨论了光源线度对空间相干性的影响和光源频谱对时间相干性的影响,得出光源线度和谱宽与光场相干性之间的关系。
2.
The spatial coherence of expanded light source is due to the correlation between different lightening parts, and the temporal coherence is due to the correlation between the values of a wave at two different times.
空间相干性问题来源于扩展光源不同部分发光的独立性,表现在波场横向相干范围;时间相干性来源于光源发光过程在时间上的断续性,表现在波场的纵向相干范围。
3.
This paper first introduces basic physical quantity of coherence and discusses temporal coherence starting from Michael interfering experiment.
本文给出了描述光场相干性的基本物理量,从迈克尔逊干涉实验出发,讨论了时间相干性;以矩形谱线的光源为例,计算了时间相干度,简要介绍了傅里叶变换光谱学原理。
4) Temporal decoherence
时间去相干
5) time-coherence
时间相干性
1.
Based on the approximate descriptions between the frequency-width Δν and coherent τc time about light source time-coherence by using Newton iterative method, the more precise relations is derived between them.
针对光源时间相干性中频谱线宽Δν与相干时间τc的关系(Δν≈τc)的粗略表达,运用牛顿迭代法对两者的关系进行了较精确的推导,并对其误差及范围进行了讨论。
6) time coherence
时间相干性
1.
An experimental system for investigating the time coherence of light and Fourier transform spectrum analyzing has been built,which can collect the real-time interference signals of various illuminants such as He-Ne laser,natrium lamp and incandescent lamp on Michelson interferometer.
构建了一套改进的光的时间相干性以及傅里叶光谱分析实验系统,该系统利用光机电以及计算机软件编程技术,实时采集以He-Ne激光器、钠光灯和白炽灯为代表的各种光源在迈克耳孙干涉仪上产生的干涉条纹信号,将得到的光信号经光电倍增管转换为电信号进入电路系统,经滤波、A/D转换后,再输送到计算机进行傅里叶变换以及频谱分析。
2.
The mathematical analysis of time coherence of optical waves is carried out from the statistical characteristic of optical field, thus finding out the relation of the corresponding function of time coherence to the quanlity and revealing that the regularity of statistical theory of light is more universal than that of classical theory.
从光场的统计性质出发，对光波的时间相干性进行数学分析，找出和时间相干性对应的函数及量值间的关系，从而揭示出光的统计理论比经典理论具有更普遍的规律性。
补充资料：相干散射和非相干散射
再辐射的光量子频率和被吸收的光量子频率准确相等的散射过程称为相干散射。在相干散射的情况下，源函数准确地等于平均辐射强度。再辐射的光量子频率和被吸收的光量子频率不相等的散射过程称为非相干散射。在天体物理中，存在一系列因素使散射过程成为非相干散射。主要的因素是：原子的能级有一定的宽度、原子的热运动和湍动以及压力效应等。对于非相干散射，源函数是相当复杂的。
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