laser frequency造句

• Recently , laser frequency standards have developed rapidly
  近年来，激光频标得到了迅速发展。
• Numerical simulation and experimental research on 589 nm laser frequency - summed by lbo
  激光的数值模拟及实验研究
• Look back the history of laser frequency conversion and present the present situation and the trend of quasi - phasematched ( qpm ) . 2
  1 、回顾了激光变频的历史，着重介绍了准相位匹配及其材料的研究现状及发展方向。
• Utilizing quasi - phasematched ( qpm ) technique to achieve a given useful laser frequency conversion is a practical and challenging topic
  利用准相位匹配( qpm )技术在光学超晶格中实现特定的可实用化的激光频率变换，在目前是一个富有实际意义和挑战性的课题。
• After obtaining optimized laser frequency 5hz accepted - pulse - times 10 / second by experiments , laser power density increased little by little is focused on study
  实验在优化频率为5hz ，受光次数10次秒时，重点研究了激光能量密度由小到大对晶化性能的影响。
• This paper describes the important breakthrough of laser frequency measurements technology since 1999 , i . e . the absolute frequency value of laser frequency standards can be directly measured by femtosecond modelocked laser
  摘要简述了自1999年以来激光频率测量技术出现的重大突破，用飞秒锁模激光可以直接测量激光频标的绝对频率值。
• It presents the mathematical models for the ppm modulation and demodulation circuits system . author gives out the conditions of linear modulation and demodulation , and educes its connection between the modulation factor and maximal laser frequency excursion
  建立了ppm调制与解调的数学模型，给出了实现线性调制与解调的条件以及调制深度与最大激光频率偏移之间的关系。
• The main results and creative points in the dissertation were as follows : a ) by means of studying on the fiber - optic hydrophones ’ tdm array based on phase generated carrier ( pgc ) demodulation with laser frequency modulation , the mathematic models were set up , used for theoretical analyses of noncoherent crosstalks in the system using low coherent laser and coherent crosstalks in the system using high coherent laser . the formulas calculating crosstalks were given , and the method measuring crosstalks was shown definitely
  本论文的主要研究结果和创新在于: 1 、通过对基于光频调制pgc (相位生成载波)解调光纤水听器时分复用系统的研究,针对低相干光源的串扰强度迭加和高相干光源串扰的相干迭加,建立了理论分析的数学模型,得出了计算串扰的公式,明确了测试系统串扰的方法。
• So qpm enlarge the application range of the crystal in existence . presently diode pumped all - solid - state lasers have been developing quickly , which provides an ideal pump source for qpm . so lower power all - solid - state laser frequency conversion by qpm has been becoming a research focus
  近年来，随着激光二极管( ld )技术的发展，小功率全固态激光器已经十分成熟，为准相位匹配提供了优质的泵源，因此，小功率全固态激光器的准相位匹配频率变换成为目前的一个研究热点。
• This thesis first introduces the basic theory used in fog , and then analyses the resonator - one of the key parts . this analysis illustrates the output character under certain laser frequency width . the output character is converted into lorentz function form considering the laser frequency width
  本文首先介绍了谐振式光纤陀螺的基本原理，对其关键器件- - -谐振腔的谐振特性做了分析，重点分析了在激光器频宽一定的条件下谐振腔的输出特性，并最终将其转化为包含了激光器频宽的洛伦兹函数形式。
• Numerical simulations were done to show the distortion of the wavefront and the interference pattern under several kinds of typical plasma density distributions . the ray path in plasma was calculated by the numerical solution of the vector equation of light ray , when the plasma density was closing to the critical electron density of the laser frequency . through the simulations , the factors that influence the measurement were found out under different density distributions and shapes of plasma
  在此基础上，采用数值模拟的方法，计算了在几种典型的等离子体密度分布下，激光波面的变化和产生的干涉图样；并用光线矢量微分方程的数值解法计算了当等离子体密度接近光频临界电子密度时，光线在等离子体中的传播路径，从中掌握了在不同的等离子体密度和形状下，进行干涉测量所应估计到的因素。
• With the development of laser techniques , the optical cavity has played an important role on monitoring laser mode , measurement and narrowing of laser linewidth , laser mode cleaner , laser frequency stabilization , optical spectrum and cavity - qed etc . , due to its advantages of ultra - low losses , high finesse and narrow linewidth
  随着激光技术的发展，谐振腔由于其腔内损耗小、精细度高、线宽窄等特点，使得其在监视激光模式、测量并压窄激光线宽、激光模式清洁、激光稳频、激光光谱学、腔量子电动力学等方面起到重要的作用。
• Because p - si is of more special characteristics , comparing to a - si and c - si , firstly , i set forth electrical features of p - si film and acknowledge profoundly electrical mechanism of p - si film . then three parameters of laser annealing , including laser frequency - , accepted - pulse - times and laser power density are studied how to influence crystallization of p - si
  因为多晶硅和非晶硅及晶体硅相比具有更独特的特点，所以我们先阐述了多晶硅薄膜的电学特点，对多晶硅的导电机理有了深刻的了解；然后研究了激光频率、受光次数和激光功率密度三个参数对晶化多晶硅的影响。
• The frequency of the slave laser is not locked to the master laser when the polarization direction of the injected laser is perpendicular to the polarization direction of the slave laser which is free - running . the slave laser frequency shifts toward low frequency because of thermal effect in the slave laser cavity induced by the injected laser
  当注入光偏振方向与从激光器输出光偏振方向垂直时，从激光器频率不会被锁定到主激光器频率上，但由于外部光注入引起的从激光器腔内热效应，使得从激光器频率向低频方向移动。
• When the laser frequency is larger than the atomic resonance frequency ( blue detuning ) , the atoms will experience a repulsing force that will repulse the atoms to the minimum place of light field . this is the principle of atomic mirror or atomic guide and trap . in this thesis , we propose three novel mirrors to reflect atoms by using intensity gradient induced by a blue - detuned semi - gaussian laser beam , a blue - detuned semi - ellipse - gaussian laser beam and a blue - detuned semi - flattened - gaussian laser beam
  本文提出了三种实现原子束反射的原子反射镜的新方案： ( 1 )半束兰失谐高斯光束的原子反射镜( 2 )半束兰失谐椭圆高斯光束的原子反射镜( 3 )半束兰失谐平项高斯光束的原子反射镜，详细计算了上述反射镜的衍射光场的空间分布，并讨论了运动原子在光场中所受的偶极力。
• The concept of viffoal laser frequency stabilizaion is put fowi . the frequency stabilizaion at the center of doppler curve has been realized aller signal detecting , phase sensitive detecting , integrating and high voltage amplifying circuits with fm spectroscopy a frequency stability of l0 - , has been obtained with a reproducibility of l0 - 9 . hyperfine spectra of , ' , i , near 532nm have been studied via modul8tion tfansfer spectroscopy
  利用fm光谱法将激光单次通过碘吸收室进行线性吸收，再经信号检测、混频、积分和高压放大等伺服电路，实现了在多普勒曲线中心处的频率稳定，频率稳定度和复现性可达10 ~ ( - 9 )量级。
• The definition of stability and repeatability of the laser frequency and factors affecting the stability of laser frequency were analysed . the normal methods used to stabilise frequency and produce double - frequency were explained . after analysing the working conditions and related parameters of the laser device , it was concluded that the laser tube should be put inside an insulating cover and an electric discharge tube with a bigger diameter and length , smaller wall thickness and a higher thermal conductivity coefficient should be chosen
  分析了激光频率的稳定性、复现性的定义及影响激光频率稳定的因素；介绍了常见的稳频及产生双频的方法；分析论证了激光器双纵模热稳频的使用条件和有关参数的关系，得到结论是：应将激光管装在保温罩内；选用放电管直径及长度大、壁厚小、材料导热系数大的放电管。