光纤

The phase tracking principle of source-contained homodyne detection is researched, the frame diagram for phase detection and experimental results are given.

介绍了一种新型的光纤电压传感器结构和工作原理，分析了系统中椭圆芯双模光纤的传输模式和模间相干光斑的变化，采用熔接的方式进行相干光接收来获得正交相位漂移信号，根据模间群折射率差与光程差的关系设计调整光纤的长度，依据石英晶体和空气的绝缘强度进行传感光纤匝数设计，讨论了含源零差探测法的相位跟踪原理，给出了相位检测框架图及实验结果，分析表明该设计方案能达到相位跟踪的目的。

In this thesis, several problems of time-dependent systems in various branches of physics are investigated by making use of the generalized invariant theory and the invariant-related unitary transformation formulation. The problems are given as follows:(1) Spin model and geometric phase factor in the fiber We investigate the fiber experiment performed by Chiao-Tomita and the Chiao-Wu theory concerning the geometric phase factor in the optical fiber, and then show that the investigation of the propagation of photons inside the noncoplanar optical fiber can be regarded as that of a second-quantization spin model.

本论文用推广的不变量理论和与不变量有关的幺正变换方法研究了一些物理分支中的几个含时系统问题：(1)自旋模型与光纤中光子几何相因子问题重新考察了Chiao-Tomita光纤实验和Chiao-Wu关于光纤中光子几何相因子的理论，证明了在非共面弯曲光纤中传播的光子运动问题实际上可以化为二次量子化含时自旋模型研究。

A formula was derived and given to calculate the Shupe effect in the quadrupolar winding including the effects of the midpoint deviation and the fiber diameter. This formula, compared with that considering only the ideal situation, can not only be used to account the thermally induced nonreciprocal phase shift under different midpoint deviations and fiber diameters, but also indicate the effects of the fiber coil's structure when there exist nonideal factors.

本文分析了中点偏差、光纤直径尺寸对四极性绕法中相向传输光对称性的破坏，推导给出了包括中点偏差和光纤直径尺寸影响的四极性绕法热致非互易相移的计算公式，该公式相对于只考虑理想情况的计算公式，不仅能计算不同中点偏差和光纤直径情况下的热致非互易相移，而且揭示了存在非理想因素时，光纤环结构对热致非互易性的影响。

This paper presents a temperature testing technique based on fiber-optic transmission and the principle of optical fiber, the coupling between the optical fiber and photoelectrical probe, linear solution of temperature sensitive components.

提出了一种基于光纤传输的温度测试技术，重点介绍了光纤测温原理、光纤耦合和温敏元件的线性处理技术，并分析了表面发射方式的光纤耦合传输特性。

A single-longitudinal mode fiber laser with fiber saturable absorber is designed. Tunable fiber Bragg grating as the wavelength selector is in the ring cavity with a 2 m-long unpumped erbium-doped fiber.

设计了一种基于光纤饱和吸收效应的环形单纵模光纤激光器结构，以可调谐光纤布拉格光栅作为波长选择器件，与2 m未抽运掺铒光纤一起位于环形腔反射臂上。

Fiber grating coupler has good wavelength selection characteristic of optical fiber grating as well as multiport advantage of fiber coupler. These features make it easy to realize allfiber optical add/drop multiplex.

光纤光栅耦合器具有光纤光栅良好的波长选择特性和光纤耦合器的多端口特点，易于实现全光纤的光波分插复用。

A stabilised optical fiber interferometric measurement system made with a 3×3 coupler and fiber Bragg gratings is presented. By employing the fiber Bragg gratings as in-fiber reflective mirrors, the system interleaves two fiber Michelson interferometers together that share the common-interferometric-optical path.

针对这一问题，提出利用光纤3×3耦合器和光纤光栅构成光路复合在一起的两个光纤迈克尔逊干涉仪构成的光纤干涉测量系统。

The absorption coefficients of these two high concentration EDFs reach 66.3dB/m and 59.5dB/m at wavelength of 1530nm respectively, Short cavity ring structure high concentration EDF lasers with these two high concentration silica host high concentration EDFs were presented.

利用这两种石英基高浓度掺铒光纤，采用环形结构制作出了短腔的光纤激光器，光纤激光器中铒光纤长度分别仅为30cm和90cm。

The paper describes the work as follows.First,based on the knowledge of collapsar technics,this paper analyzes the characteristic of optical fiber collaperser machine software system and hardware structure,A P8 system and its development kit has been installed first in China,and the hardware system of the optical fiber preparation collapsar has been designed and debugged.

本文主要做了以下几方面工作：首先，在了解光纤预制棒熔缩机工艺的基础上，剖析了长飞光纤光缆有限公司的光纤预制棒熔缩机的软、硬件的特性，在国内首次组装了P8及开发系统，设计出光纤预制棒熔缩机的硬件系统，并作了调试。

The pressure responses of polymer packaged fiber Bragg grating sensor are analyzed, a special kind of pressure-resistant polymer is used to coat FBG in a metal tube. A kind of soft elastic material is used to reduce the friction between tube and polymer, and to eliminate chirp effect caused by different friction distribution to improve the pressure response of FBG.

分析了聚合物封装光纤光栅的压力响应特性，通过采用特殊聚合物材料将光纤光栅封装于金属套管中，并通过在金属套管预涂覆一层软弹性材料，以消除封装过程中由于聚合物固化收缩以及聚合物与套管壁粘接与摩擦产生的光纤光栅啁啾化，改善了光纤光栅压力响应特性。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。