| 1. | The paper presents its mode coupling mechanism , the fabrication methods as well as its applications
介绍了长周期光纤光栅的耦合机理、制备方法以及应用。 |
| 2. | The gaussian field can be obtained by controlling the mode coupling from the main mode to high mode
要得到口面上的合成高斯场，就必须控制从单模到合成高斯场的各个波导模式的耦合过程。 |
| 3. | 2 . the mode coupling for the lpfgs is analyzed though both the mode coupling theory and transmission matrix theory
2 、详细阐述了长周期光纤光栅的模耦合理论和传输矩阵理论，并进行了模拟计算。 |
| 4. | The program that can numerically solver the question of mode coupling in horn has been programmed according to the coupling wave theory and mode matching technology
本文在对耦合波理论和级连模匹配技术的理论推导的基础上，编制了数值求解各个模式在喇叭中耦合过程的计算程序。 |
| 5. | In chapter 5 , a long - period fiber grating with rectangular index modulation is studied by the coupled - mode theory . the couple - mode equations that describe the mode coupling in this kind of grating are presented
本章仍以耦合模理论为基础，首先对该类型光栅的折射率微扰进行展开，进而推导其相应的耦合系数和建立耦合模方程。 |
| 6. | As the wing - pivot frequency decreases , it couples with the vehicle short - period mode resulting in dynamic instability . a similar instability sometimes occurs when the pivot mode couples with the fuselage - bending mode
随其频率降低,它与飞行器短周期模态耦合时会导致飞行器动不稳定,而与机身弯曲模态耦合时同样会导致模型动不稳定性。 |
| 7. | Analyses also have been done on the fbg sensor principle using mode coupling theory . the reflecting spectrum is calculated . the measurement principles for both the temperature and strain are deducted
用模式耦合理论分析了光纤布拉格光栅原理,并用数值模拟计算了光纤布拉格光栅的反射光谱,进一步分析了光纤布拉格光栅应变和温度传感原理。 |
| 8. | 2 . under the condition of taking account of mutual coupling among the array elements , mode coupling method is used to establish analyzing model for finite array , and parameters of the array structure satisfying the design index are got
2 .在考虑阵列单元间互耦影响的情况下,采用模式耦合法建立有限阵列分析模型,得到了满足设计指标的结构参数。 |
| 9. | The detail study on the interaction between the electron beam and standing wave of complex cavity gyrotron with gradual transition and gyroklystron has been done in this dissertation , supported by the pre - study important items " the study on 8mm third harmonic gyrotron with a permanent magnet system " and " the study on 8mm high power gyroklystron " . the main works of this dissertation are listed as following : 1 . the study on the rf distribution of the complex cavity with gradual transition is presented , in which the multi - modes coupling are taken into account
本论文就是结合该课题组的“九?五”重点项目“ 8mm三次谐波永磁包装回旋管技术的研究”及“十?五”重点项目“ 8mm高功率回旋速调管技术的研究” ，对以谐振腔为互作用高频系统的回旋脉塞器件中两种典型的器件? ?回旋振荡管及回旋速调管中电子注与驻波场的互作用进行了深入细致的探讨和研究，其中回旋振荡管采用的是渐变复合腔。 |
| 10. | To illustrate the superiority of this type of transition , the author adapted the local normal mode ( lnm ) based on couple - mode theory to explain the coupling between two lowest order modes along the transition . for the two important parameters , propagation constants difference between the two modes apy and mode coupling coefficient cy , which denoting power coupling between lnms , the approximation expressions using structure parameters were worked out . then the author compared three typical different transitions according to the demanding of power coupling , at last concluded that the parabolic - type transition can transport the light in shortest length with lowest loss
对于表征局部标准模之间功率耦合的两个重要的参数_ ( ij ) (模式传播常数差)和c _ ( ij ) (模式耦合系数) ，推导了用器件结构参数表达的近似公式，然后根据功率耦合的需求，在常见的三种不同轮廓的过渡区之间进行了比较，得出了抛物形轮廓过渡区能够使光束在最短尺寸内以最低损耗通过波导的结论。 |
