相干长度

高Tc氧化物超导体涨落效应的研究及对相干长度和能隙的讨论

The studies on thermodynamic fluctuation and discussion of coherence length and energy gap in high t_c oxide superconductors

φe特性与材料性质的关系，讨论了器件颈缩线度远大于材料相干长度的原因。

The reason why necked size of the device is far larger than the coherence length of the material has been discussed .

本文论述了大气湍流对自适应光学系统的影响，导出了水平光程上大气相干长度ro的测量式。

The formula for measuring the atmospheric interference length ro on horizontal optical path is derived .

衍射极限倍数N与匀强平面波源相干长度有确定的关系。

There 's determined relation between times of diffraction limit N and coherent length of a source with homogeneous intensity .

对流湍流池Fried相干长度的光学结构

Optical Structure of Fried ′ s Coherence Length in the Convective Turbulent Tank

Y1Ba2Cu3O（7-δ）超导体中热力学涨落效应和相干长度

Thermodynamics fluctuation and coherence length in y_1ba_2cu_3o_ ( 7 - δ) superconductors

根据微聚焦硬x射线管的光学传递函数，对光源尺寸、相干长度等因素对成像分辨率的影响进行了分析。

According to the optical transfer function of the microfocus x ray source , the effects of the size of the x ray source , the coherent length of x ray on the imaging resolution are discussed .

在保证1.5%精度及假设光源相干长度为1mm的前提下，给出了具体的速度分档情况。

Assuming the coherence length is 1 mm , specific ranges of velocity under the precision of 1.5 % were presented .

提出了一种计算大气相干长度（r0）的新方法。

A new method is proposed to estimate atmospheric coherent length .

该模型可用于优化空间分集结构和空间相干长度以提高MIMOFSO链路在各种大气湍流条件下的传输容量。

There exist optimal values of spatial coherence length and diversity configuration for maximizing the average capacity of MIMO FSO links over a variety of atmospheric turbulence conditions .

我们通过实验测量了运行在远低于阈值的情况下，OPO腔中产生的自发参量下转换光子的一阶相干长度。

We report on experimental measuring the coherence length of the single photon , which is generated via a degenerated OPO far below threshold .

本文推广了McMillan隧道模型，并应用于厚度小于超导相干长度的超导和正常膜组成的N-S多层薄膜结构。

The McMillan tunneling model has been generalized and applied to a N-S multi-film structure with thickness of each film smaller than the superconducting coherent length .

根据变型VonKarman谱并利用相干长度的新定义推导出归一化信噪比函数的普遍表达式。

On the basis of the modified von Karman spectrum , a normalized general expression of signal-to-noise ratio function is derived by means of a new definition for the coherence length .

最新研究发现利用腔长仅为相干长度的光学微腔也可以用来补偿非线性频率变换过程中的位相失配，这就是所谓的腔位相匹配（CPM）。

Besides , the sub-coherence-length micro-cavity can also compensate to the phase mismatching in the process of nonlinear frequency conversion with high efficiency , which is the so-called cavity phase matching ( CPM ) .

相位跃变干扰了Stokes光的相位，减小了相干长度，增加了光谱宽度。相位跃变的产生中断了SBS的相位共轭过程，造成SBS的相位共轭度下降。

Phase jumps disrupt the phase of the Stokes beam generated by SBS , therefore tend to decrease the coherence length , increase the spectral width of the Stokes signal , suspend the phase conjugation process and decrease the fidelity of phase conjugation .

所用激光器为Nd：YAG脉冲激光器，采用了调Q和二倍频技术，波长为0.532、脉冲宽度为7ns、相干长度为2cm，能量为35mJ。

With double-frequency technique and Q switch technique the laser delivers a laser pulse of 532-nm in wavelength , 5-ns in pulse width , 35-mJ in energy and 2-cm in coherent length .

计算表明，相干长度降到低于1mm时，散斑对比度减小到0.5左右，得到的图像细节相对比较清楚，易于检测。

Calculation results show that when coherence length is less than 1 mm , speckle contrast is reduced to 0.5 , which is advantageous to obtaining excellent measuring accuracy and keeping good details for a image .

Greenwood频率和大气相干长度r0能够从时间域和空间域表达光束受湍流扰动的综合强度。

Greenwood frequency and atmospheric coherent length ro can describe the coherence of beam transmitting through atmospheric turbulence and the global intensity of turbulence from both time domain and space domain .

LD泵浦Nd：YAG微片激光器结构简单紧凑，与半导体激光器相比，前者具有激光线宽窄、光束质量好、相干长度长等优点，因此在一些测量领域有着较好的应用前景。

Compared with diode lasers , LD pumped Nd : YAG microchip lasers , in each of which the Nd : YAG crystal itself forms the resonance cavity , have narrower frequency linewidth , better beam quality and longer coherent length , meanwhile they are remarkably simple and compact .

在一年中，冬季相干长度最长，湍流最弱，DIMM系统在测量大气相干长度方面具有可行性。

In the year , the coherence length of the longest is the biggest in the winter , This illustrates mat DIMM system for measuring atmospheric coherence length is feasible .

DAST因具有高的非线性和电光系数、低的介电常数、大的相干长度和快的响应时间等优点而在光整流法产生和探测THz波方面存在巨大应用潜力，目前对其研究较多。

DAST is one kind of the most important materials in generating and detecting THz radiation for the reason that it has large optical nonlinear and electrooptic coefficients , low dielectric dispersion , large coherence length and ultra fast response time .

采用在腔内插入两个直径为1.8mm的可变光阑和输出光的准直结构（4倍），增大光源的相干长度和可测距离；

Two optical stops ( whose diameter is 1.8 mm ) inserted into the resonant cavity and collimating structure of light output ( 4 ×) are adopted to increase coherent length and measurable distance .

实验表明，采用类三角波电流调制可有效减小半导体激光的相干长度，从400mm减小到40μm，将准白光干涉瞄准的精度提高到1μm。

It has been proved by experiments that the coherent length of the semiconductor laser is effectively reduced from 400 mm to 40 μ m by adopting current injecting method , with the result that the collimating accuracy of the quasi-white light is improved up to 1 μ m.

大气相干长度及其对激光外差接收机的影响

Atmospheric Coherence length and its effects on a laser heterodyne receiver

四孔差分像运动测量大气相干长度的方法研究

Measurement of atmospheric coherent length by four-aperture differential image motion method

将此方法应用于61单元的自适应光学系统中，对实测大气相干长度进行了分析。

This method is used on the 61-unit adaptive optics system .

基于自适应光学系统闭环数据的大气相干长度的计算

Estimation of atmospheric coherent length based on adaptive optics closed-loop data

用于提高国产氩离子激光器相干长度的相干扩展器

A coherence extender for the domestic argon - ion lasers

质疑波列长度等于相干长度

Inquiry to the length of wave train equals coherence length

利用湍流廓线获得斜程大气相干长度的实验研究

Experimental study of obtaining atmospheric coherent length from turbulence profile