光纤

Moreover, the simulative result shows : under adopting DCF and Sech function , the lower (σ/σ0) min can be achieved at shortest distance ; and under HNLF and Sech function, the lowest (σ/σ0) min can be achieved.

数值仿真的结果表明：在色散补偿光纤和双曲正割型脉冲的条件下，能在较短的距离上获得理想的压缩比；在高非线性光纤和双曲正割型脉冲的条件下，能获得更低的压缩比。

Using staircase concatenation method SCM,the optimum coupling conditions were achieved for wedge-shaped fiber wedge angle,cylindrical endface lens curvature radius,semimajor axis of planar lightwave circuit elliptical field,aspect ratio of planar lightwave circuit elliptical field,misalignment tole.

在多量子阱-平面光波光路前置模斑转换器和不加模斑转换器的情况下，用阶梯串联法数值模拟并优化设计了楔形光纤-平面光波光路间最佳耦合参量：楔形光纤楔角45°、端面圆柱透镜曲率半径2。

The assembly of tuning fork and optical fiber probe is used to perform the shear force distance control.

粘接音叉和光纤探针的胶粘剂对由石英音叉和光纤探针构成剪切力控距体系的品质因数有明显的影响。

The current status and characteristics of the application of short line protection are analysed.

通过对短线路保护应用的现状和特点进行分析比较，指出光纤保护是未来短线路保护应用的趋势，介绍了WXH -35型光纤纵差保护在短线路上的应用情况，并提出了一些建议。

A fiber grating structure with cladding radius as sinusoidal function along the grating length is introduced.

提出了一种光纤包层半径为正弦函数的光纤光栅。

The experimental results show that the maximum detectable fiber length is longer than 1000 m. The measurement sensitivity and spatial resolution will decrease with the increase of fiber length.

实验结果表明，该传感系统能检测大于1000 m的保偏光纤，测量灵敏度和空间分辨率随光纤长度的增加而逐渐衰减，温度低于100 ℃时，其波动对测量影响很小。

This paper makes use of popular devices in lab for measuring the spectral property of fiber grating. This makes the basic condition for developing the study of fiber grating.

论文研究使用实验室常用仪器来测量光纤光栅的光谱特性，为开展光纤光栅的研究工作创造了基本条件。

Such systems use the spectrally pure distributed-feedback lasers to minimize fibre dispersion effects.

这种系统采用光谱纯的分布反馈激光器，将光纤色散效应减至最小在1.55微米波长上设计的低色散光纤。

A new type fiber coupling system is designed,which consists of four parts:large aperture lens,1/4 pitch grin lens,taper fiber and step optical fiber with spherical end surface.

设计了一种新型的耦合系统，该耦合系统由大口径聚焦透镜、1/4节距自聚焦透镜、锥形光纤和球端光纤四部分组成。

Studying mode structure of fiber laser by spherical surface scanning interferometer, in theory deducing the method of measuring width by spherical surface scanning interferometer, proposing two kind of narrow width fiber lasers.

5利用球面腔扫描干涉仪研究了光纤激光器的模式结构，从理论上对球面腔扫描干涉仪测线宽进行了分析研究，提出了两种窄线宽光纤激光器。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。