光纤

Further analysis shows that this is caused by the long-period fiber gratings phase matching condition,which is different from that of Bragg grating.

进一步的分析指出，这是由长周期光纤光栅不同于Bragg光纤光栅的相位匹配条件决定的。

It is very important for estimating the size of photodetector aperture to calculate the Gauss-Laguerre correlation functions.

我们应用Bartelt和Freude等人l'，【51提出的光纤中模式分析测量的新方法—用计算全息产生的光学匹配滤波器对光纤中的模式进行分析测量，需要知道Gauss一Laguerre函数的卷积表达式，以此来估算测量时所有光电检测管的孔径大小，估计测量结果的精度，减小测量误差。

The results of calculation and measurements have been demonstrated by the experimental researches on photosensitivity and grating performance of chalcogenide fiber.

在详细了解和分析硫系玻璃材料性质的基础上，对硫系光纤的基本特性、特殊工艺、光纤的基本实验方法进行了理论和实验研究。

The invention relates to a light pumping system for all-solid laser, particularly a light pumping system for disc type laser, comprising heat sink, laser crystal, optical fiber, plane reflector, a first concave reflector, a second concave reflector, and a third concave reflector, and adopting a structure that the plane reflector is between the optical fiber and the first concave reflector, to make the LD and laser cavity on the same side of the laser crystal, thus reducing the packaged size of the laser; the invention fixes the plane reflector on the heat sink to reduce the inclined incident angle of the pumped light beam, thus the pumped light can be fully absorbed, and the invention solves the problem of pumping efficiency and largely reduces the bulk of the laser, beneficial to the all curing of the product and ensuring the cooling requirement of the laser crystal.

本发明涉及全固体激光器的光泵浦系统，特别是一种盘式激光器的光泵浦系统。包括热沉1、激光晶体2、光纤3、平面反射镜4、第一凹面反射镜5、第二凹面反射镜6、第三凹面反射镜7，本发明采用平面反射镜位于光纤与第一凹面反射镜之间的结构，使LD和激光腔位于本发明激光晶体的同一侧，从而减小了激光器的封装尺寸；本发明将平面反射镜固定在热沉上，使泵浦光束斜入射角减小，泵浦光则能充分吸收，为此，本发明解决背景技术采用第一凹面反射镜使泵浦光束斜入射角过大引起的像散，泵浦光斑变形引起泵浦效率降低问题，使得本发明可选用大面积半导体制冷器，避免使用水冷，则激光器的体积大大减少，有利于产品的全固化，保证了激光晶体的散热要求。

When the optical fiber which is drawn by the magnetooptic glass with the rodintube method is put in the magnetic field produced by Helmholtz coil and while the linearlypolarized beam goes through the fiber, the polarization plane of the linearly polarized beam is rotated to a certain angle.

将采用模管法拉制成的磁光玻璃光纤置于亥姆霍兹线圈产生的磁场中，当线偏振光通过该光纤时，其偏振面旋转一定角度，把该角度转换成光信号的强度，然后再用仪器进行检测。

One or more plane sections (8,9) and part cylinders (10,11) connecting to the plane sections (8,9) are formed at the outside (7) of the capillary using for fixing the fiber, all the part cylinders (10,11) are formed with a single center axis and the same radius, meanwhile a patchhole (3) of the inserting fixed fiber (2) is formed in the deflected position of the center axis and in the vertical direction of the first plane section (8) which is used as the standard.

在光纤固定用玻璃毛细管(1)的外面(7)形成有一个或多个平面部(8、9)和与该平面部(8、9)连接的一个或多个局部圆筒面(10、11)，该所有的局部圆筒面(10、11)都是以单一的中心轴和相同半径形成的，同时在与作为基准的第一平面部(8)垂直的方向上从中心轴偏离的位置上形成有插入固定光纤(2)的插入孔(3)。

It measures the rotation angle of optical wave polarization plane caused by magnetic field produced by current when the optical wave goes through magneto-optic material to calculate the current.

光纤电流传感器是以法拉第磁光效应为基础、以光纤为介质的新兴电力计量装置，它通过测量光波在通过磁光材料时其偏振面由于电流产生的磁场的作用而发生旋转的角度来确定被测电流的大小。

When a probe light is launched into a sensing optical fiber, the Bril-louin spectrum of every point along its length can be obtained.

BOTDR通过探测光纤中后向散射布里渊光的频率改变，换算出光纤沿线各点的应变值。

The principle of optical coherence domain polarimetry was demonstrated and the beat-length measurement equation was derived.

基于光相干域偏光测试技术，提出了一种高精度的保偏光纤拍长测试方法，实现了不同结构、不同尺寸保偏光纤的拍长测试。

Now, photonic crystal fiber has already been put into use. Though the application is initial, it has displayed largish application potence. It will push optical fiber technology to arrive a new high peak.

目前，已有光子晶体光纤投入使用，虽然应用属于初步，却显示了相当大的应用潜力，它将把光纤技术推向新的高峰。

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。