光纤

However, commercial grade silicon tetrachloride contains impurities which increase the optical loss.

四氯化硅是生产石英通信光纤的主要原料，但粗四氯化硅中含有多种杂质，直接影响光纤的损耗特性。

We made an experimentally and theoretically research on SRS at low temperature (about 80K-190K) in highly single mode circular optical fiber. The experimental apparatus is designed and the principle of experiment is given. The SRS in highly single mode circular optical fiber is measured at different temperature. A series of SRS spectra is get in low temperature. On base of the spectra, we get a curve of the frequency shift and the half breadth with the temperature fluctuation.

对石英系圆芯光纤在低温下(80K-190K)的受激喇曼散射进行了初步的实验研究，设计了实验装置，给出了实验原理，在不同温度下对单模圆芯石英光纤的喇曼散射进行了测量，得到了在低温条件下喇曼散射的一系列光谱图，得出了喇曼谱线的频移、半宽随温度变化而变化的曲线。

The optical bistability is observed in the latter laser. By applying equations, the condition of forming self-written grating, reason of single mode lasering and suppressing effects on all side modesis presented.

同时利用速率方程在对饱和吸收光纤中自写入光纤光栅的形成进行了理论分析，给出了形成条件、解释了单频激光形成原因和对边模有效的抑制作用。

The influences of multiple of coherence length and the length of delay fiber to the result of measurement have been discussed in the self-heterodyne method also.

讨论了延迟光纤倍数、以及延迟光纤长度对延迟自外差线宽测量结果的影响。

The linewidth of output laser was less than 500 Hz measured through fiber delayed self-heterodyne method. The degree of polarization was stable at 99.7%.

通过光纤延迟自外差线宽测试系统得到输出激光线宽小于500 Hz，光纤激光器输出光偏振度长时间稳定在99.7%。

This thesis from the angle of signal detection, first theoretically gives out a RFOG closed signal detection design based on DSP. The signal detection system mainly includes related detection. signal conversion and the formation of feedback saw tooth. Related detection must guarantee signal synchronization sampling, and get the biggest signal noise ratio.

本文首先分析了谐振式光纤陀螺的基本原理和系统结构，并从信号检测的角度出发，从理论上给出了一个基于DSP实现的谐振式光纤陀螺的闭环信号检测方案，信号检测系统主要包括相关检测，信号的转换和反馈锯齿波的形成。

The fiber sensor is based on the fiber micro-bend effect and made by a kind of rubber that is sensitive to oil.

光纤传感器依据光纤的微弯效应进行设计，采用对油气敏感的材料制作，实现对油气泄漏的检测。

Comparing with conventional 1×7 mixing rod plastic optical fiber coupler using tapered mixing rod, 1×7 CMRC uses cylindrical POF as mixing rod instead of tapered POF thus eliminate the high demanding POF tapering process and lower the production cost.

由于安装成本在局域网总成本中占有相当大的比重，塑料光纤要在连接密集的局域网中取得显著的性能价格比优势，就需要有高性能价格比的光纤连接器和耦合器[2 ，3] 。

The company's main business includes: installation of network cabling project services, cable / fiber jumper / pigtail products such as optical fiber system, the whole room works, security surveillance systems, broadcasting systems, mine grounding, computer network Systems integration, network optimization, network planning and design, safety assessment system, network management consulting, and network equipment sales.

公司的主要业务包括：网络布线工程安装服务、光缆/光纤跳线/尾纤等光纤系统产品、整体机房工程、安防监控系统、广播系统、防雷接地；计算机网络系统集成、网络优化、网络规划设计、系统安全评估、网络管理咨询、网络设备销售。

The company's main products: fiber optic connectors, adapters, attenuators, couplers and other passive components; fiber optic cable connector boxes,cable, fiber optic distribution frame, fiber optic wiring products such as the transfer box; Optical Power Meter and other communication equipment.

公司的主导产品：光纤连接器、适配器、衰减器、耦合器等无源器件；光缆接头盒、光缆终端盒、光纤配线架、光缆交接箱等配线产品；光功率计等通信仪器。

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。