激光

A new method using a cylindrical lens with two wedges to improve the uniformity of the line laser is provided to solve the problem of laser beam uniformly transmitting in the laser communication.

为解决核物理工程、表面热处理、激光加工、激光通信中传输激光束的均匀性问题，提出采用三角楔柱透镜改善线激光均匀性的新方法，并在ZEMAX开发环境下建立了整形光路系统的理论模型。

Light output analysis tests character of spectrum radiate of pyrotechnic mixtures and analyses wave band distribute of light by comparing different static blaze spectrograms of the pyrotechnic mixtures. Screen out the better pyrotechnic mixtures according to request of pumping source. Press experiments in airtight erupt container experiment, which simulate the circumstance that pyrotechnic mixtures deflagrate in quartz pipe, realize the press influence to the quartz pipe wall and the disciplinarian of axes press variety. Apply these pyrotechnic mixtures to Nd:YAG lasers as the pumping source and compare pumping efficiency of different pyrotechnic mixtures. Pumping efficiency is an important standard which checkout if these pyrotechnic mixtures are the better pumping source. Sensitivity experiment analysis incarnate security of pyrotechnic mixtures that is the essential parameter in the process of design, manufacture and use.

通过对烟火药的热分析(爆热分析、DTA、TG)，了解备选烟火药反应过程中的能量输出特性及反应过程中的物理、化学变化规律；光输出分析实验对烟火药配方光谱辐射特征进行测试，比较其静态火焰光谱图，分析不同烟火药剂光辐射波段分布特征，根据激光泵浦源的辐射要求，进而筛选更符合激光泵浦源药剂要求的烟火药；模拟烟火药在石英管中爆燃环境的密闭爆发器压力分析实验反映了烟火药在石英管中反应时对管壁的压力影响以及管内轴向压力变化规律；将烟火药作为泵浦源应用于Nd：YAG固体激光器，比较不同烟火药的泵浦效率，作为检验烟火药是否适合作为激光泵浦源的重要标准；感度实验分析体现了各种烟火药的安全性，是烟火药设计、制造和使用的必要示性数。

At the same time, new information about the underwater target can be got and the detectability can be increased.

在机载激光探测水下目标过程中，若采用偏振激光代替激光脉冲进行探测，不但可以压缩回波信号的动态范围，减少水面回波的影响，而且还能增加新的信息和可探测性。

And the mechanisms of laser ignition have been discussed. The distribution law of laser in energetic materials has been shown.

主要内容如下：(1)分析了激光作为理想点火源的特性，给出了激光点火的作用机理和激光能量在含能材料内部的分布规律。

In the second chapter the experiment technique and approaches are discussed,including laser induce fluorescence spectroscopy which the comprehensive adopted for liner laser spectroscopic study,and high resolution two-photon laser spectroscopy without Doppler broadening which belonged to nonlinear laser spectroscopic ,and the theory about the fluorescence rate equation .

第二章实验技术和研究方法中，讨论了在线性激光光谱中最为常用的激光感应荧光光谱、非线性激光光谱学可使谱线的多普勒宽度得以消除无多普勒双光子吸收光谱学和碰撞分析中使用的荧光的速率方程理论。

After studying the effect of Doppler broadening on the inversionless optical gain of a four-level system driven by a coherent field, the general results of the effect of Doppler broadening are given.

虽然无反转激光只需在上能级有少量的粒子数布居即可实现激光输出，但如何泵浦高激发态能级仍是实现短波长激光的主要障碍。

To research into the distribution of laser spot on the sea surface of airborne laser bathymetric system, to obtain the relationship between its spacing and scan mode, scan driver rate, laser frequency and plane speed, and to optimize its distribution are important.

通过对激光测深仪的激光海面入射点分布的研究，得到了其疏密程度与扫描方式、扫描电机转速、激光器重复频率和飞机飞行速度等参量之间的关系，并对激光海面入射点分布进行了优化设计。

Our studies showed that the PADs in few-cycle laser pulses were determined by the kinetic energy of photoelectrons, the absolute phase of the carrier wave, and the ellipticity and the duration of the short pulses.

我们用三模的激光场来模拟超短激光脉冲，对超短激光脉冲与惰性气体原子的相互作用进行了系统的研究，成功地展示了绝对相位对光电子能谱及角分布的影响。

There was no significant difference between the two groups of epistaxis in diverse area with different kind of laser.

在鼻内窥镜下两种激光治疗活动性鼻出血的疗效，Nd：YAG激光明显优于CO2激光。

In order to solve the thermal effect problem of laser rod by diode laser end-pumped,based on the heat conduct theory,a novel eigenfunction group of heat conduction equation was established and the general solutions of temperature field and thermal distortion field within laser rod were obtained.

为了解决激光二极管端面泵浦激光棒引起的热效应问题，基于热传导理论，建构了热传导方程新的本征函数解，得出了激光棒内温度场与热形变场的一般解析表达式。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。