查询词典 optical fiber

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 relation between the output phase differences and the losses of 2×2 and 3×3 optical fiber couplers with rotatory symmetry is deduced in this study, which is based on the characteristics of scattering matrix and Hermite positive definite quadratic form of the couplers.

前 言光纤耦合器用于诸如光纤干涉系统、光纤环、波分复用器件和光纤通信中的分集接收等场合时，除了要求适当的输出功率比以外，尚需考虑输出端光场间的相位关系［1～3］。

optical fiber coupler, scattering matrix ; output phase difference; Hermite quadratic form ; positive definite matrix

利用其散射矩阵为酉矩阵的么正性不难证明，2×2耦合器输出相位差恒为90°，与输出功率比无关，而耦合区具有旋转对称结构的3×3耦合器的输出相位差完全取决于输出功率比，特殊地，当等分功率输出时，输出

The parameters such as length of the optical fiber, the mass of the mass block and the damping factor were improved to achieve proper frequency feature and sensitivity.

通过调整光纤长度、质量块质量、阻尼系数等参数而得到适合的频率特性和灵敏度，为将来提高该系统的性能指明了研究方向。

Quadruplex system has greatly saved the resource of optical fiber and induced the cost per video channel.

四路视频的单光纤传输大大节约了光纤线路资源，有效地降低了单路视频的成本。

Still later, he invented the quartz glass, creating the world's first one optical fiber, so that the scientific community was shocked.

再后来，他发明了石英玻璃，制造出世界上第一根光导纤维，使科学界大为震惊。

Based on the elasticity theory axial symmetry question quasi static, the back lining material stress characteristics were analyzed. Using photoelastic theory and thermal stress theory, the influence of temperature to the optical fiber phase constant was analyzed.

首先从弹性力学轴对称问题的准静态理论出发分析了背衬材料的应力特性，并用光弹理论及热应力理论分析了温度改变对光纤相位常数的影响，得出了温度影响干涉式光纤水听器光学相位输出的数学表达式。

Based on the model of the high-order nonlinear Schrdinger equation with quintic term, we numerically study the interaction between the femtosecond solitons in optical fiber with saturate nonlinearity.

以包含五阶非线性效应的高阶非线性薛定谔方程为模型，数值研究了饱和非线性光纤中飞秒孤子间的相互作用。

A Brillouin optical-fiber time domain reflectometry system for distributed sensing measurement was reported.

报道了新型的分布式传感测量布里渊光时域反射系统。

Especially in the benthic optical fiber communication system, semiconductor laser diode is required to work more than 25 years.

但是半导体激光器作为一种高功率密度并且具有极高量子效率的器件，微小的输入电流和温度的变化都将导致输出光功率的极大变化，即使在小功率下也不能在室温下连续工作。

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。