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- The principles and devices of the offset joint method for the measurement of mode field diameter of single mode fibers, which is one of the recommendations by CCITT, are described, and the experimental results are presented. 论述了用横向错移法测量单模光纤模场直径的测量原理、测量装置和测量结果，该方法是国际电信电报咨询委员会（CCITT）所推荐的单模光纤模场直径测量方法之一。
- The paper analyzes the mode field of SLD and PM-PCF, and their coupling characteristics. 3,SLD与PM-PCF的模场分析,以及SLD与PM-PCF的耦合特性分析。
- The mode field distribution of end-face, gotten from the experiment, is accordant with theory. 从图像处理后得到的数据看，其端面模场的光强分布比较理想。
- Single mode field and two level atom 小弟找到了单模二能级
- Two methods were introduced to modify the end of fiber and try to get the expanded mode field diameter (MFD) in this work. 介绍了两种对光纤端面进行修饰以扩大模场直径(MFD)的方法(加热扩散法和熔接透镜光纤法)。
- With little difference in mode field distribution compared to the pure silica situation, the nonlinearity of PCF is greatly enhanced by doping Ge in the core region. 结果表明，在几乎不影响模场分布和色散的情况下，光纤非线性系数得到了大幅提高。
- This system has high accuracy of measurement, high automatization and can be easy to be operated by measuring the mode field diameter of the PMF two principal axes. 并通过两种典型的保偏光纤两个主轴的模场直径的测量实验证明该测试系统具有测量精度高、自动化程度高和操作简单等特点，在保偏光纤对轴、熔接等领域有一定参考意义。
- Besides, this paper also presents the dealing method of POF" end-face and the measurement of mode field, because the dealing research is included in fiber coupling. 另外，在本文中，由于在光纤耦合中要涉及光纤的端面处理，因而也介绍塑料光纤端面处理方式和单模塑料光纤模场光强分布测量。
- Based on the results, we have proved the relationship between fibers' effective area and mode field diameter, that is supplied by the ITU-T Recommendation. 并在实验测试的基础上，验证了ITU-T文件中有关光纤有效面积与模场直径间的关系。
- The results show that, when the Fresnel number is small, the low-loss mode field distribution is the low-order mode, on the contrary, the low-loss mode field distribution is the high order mode. 结果显示，模式分布类似于稳定腔的模式，并且腔的菲涅尔数越小，模式阶数越低，当菲涅尔数合适时，可实现基模振荡。
- The output mode field diameter(MFD)and divergence angle are predicted by empirical equations, simulated by finite-difference beam propagation method(FD-BPM)numeric tool, and experimentally observed. 利用射线理论和经验公式给出了TLF基模光斑和发散角;
- The letter was written on a single sheet of paper. 这封信只用一张纸写成。
- One single, second class, to winchester, please. 买一张去温撤斯特单程二等票。
- The ball went over the pitcher's head and into center field for a single. 球越过投手头顶，飞向中外场造成一垒打。
- He got over the stream with a single leap. 他一跃就跳过了小溪。
- N-Channel Enhancement Mode Field Effect Transistor 功率场效电晶体
- The bridge crosses the river in a single span. 河上那座桥是单跨桥。
- Do you want a single or a return ticket? 你要单程票还是往返票?
- depletion mode field effect transistor 耗尽型场效晶体管
- Is the material single width or double width? 这幅料子是单幅的还是双幅的？
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
