| 1. | The interval of the neighboring peaks can be derived conveniently by the resonance equation
利用谐振方程可以方便地得到取样布拉格光纤光栅的反射峰间隔。 |
| 2. | The possibility is shown that most of the energy may be reflected in the air for an electromagnetic wave of specific wave - length and incidence at a specific angle
文中给出了发生强烈定向反射时，声波波长、电磁波波长和入射角等应该满足的条件，并且计算了反射峰的宽度。 |
| 3. | The equation is related to both of the grating period and the sampled period , which have no relation to the duty ratio , the length of the gratings and the coupling coefficient
这一方程与光栅的周期和取样周期有关，它们共同确定了各反射峰的中心波长，与取样时的占空比、光栅长度和耦合系数没有关系。 |
| 4. | In the yb3 + - doped single or double clad fiber lasers by using few - mode fiber bragg gratings as wavelength reflectors , the linewidth of the output laser is smaller than 0 . 1nm , which shows that such a scheme can produce narrow linewidth laser
最吸引我们的是使用这种光纤光栅做为腔镜组成的掺yb3 +单包层和双包层光纤激光器有着小于0 . 1nm的3db带宽,说明少量模光纤布拉格光栅具有较窄的反射峰。 |
| 5. | According to fourier analysis theory and the results of coupling theory of uniform fiber grating , the spectral characteristics of sampled fiber grating is studied theoretically and the formula about its overall envelop , peek interval and the number of these peaks are obtained
摘要运用傅立叶分析与均匀光纤光栅耦合模理论的结果，对取样光纤光栅的光谱特性进行了理论研究，得到取样光纤光栅反射峰包络、反射峰间隔和反射峰数量的理论计算公式。 |
| 6. | Infrared reflectance was used in measuring the characteristics of the sio2 layer on sic . a peak appeared at about 1100cm - 1can be used to monitor the density of the sio2 layer . after annealing in n2 , the peak shifted towards high frequency
运用红外反射光谱研究sic表面生长的氧化层在退火过程中特征反射峰的四川大学硕士学位论文漂移情况，实验发现经过nz退火后，表面5102的1100cm - ，附近的特征反射峰位向高频方向移动，并且在1100左右退火时，这种漂移最明显。 |
| 7. | The wavelengths of reflectance peaks and vales are got by spectral derivative method in section 3 . 3 . mechanism of them is analyzed . red tide and normal seawater , as well as some different dominant species of red tide , such as chattonella marina and mesodinium rubrum , can be discriminated by using the wavelength information of second reflectance peak
3 . 3节运用该方法得出了实验赤潮水体光谱曲线的两个反射峰和一个吸收峰的波长范围，并对其产生机理进行了分析;更为重要的是，利用光谱曲线第二反射峰的波长位置实现了赤潮与非赤潮水体的光谱辨别，以及红色中绕虫、海洋褐胞藻等不同优势种类赤潮的识别。 |
| 8. | The bragg wavelengths can be simulated by using coupled - mode theory and the results agree on the experiments . theoretical simulations show that the temperature dependant characteristics of few - mode fiber bragg gratings are similar to those of single - mode fiber bragg gratings . that is , each bragg wavelength shifts as a same rule when the temperature varies and the whole spectrum can maintain its profile
理论上的推导还给出了少量模光纤光栅的温度依赖特性与单模光纤布拉格光栅的温度依赖性相似,得到的结论为在少量模布拉格光纤光栅均匀受热时,它的几个反射峰具有相同的温度漂移,而且这个透射谱的形状不因为温度的改变而改变。 |
| 9. | 5 . the sensing properties of multimode fiber gratings was investigated experimentally and theoretically in this paper . experimental results show that the bragg wavelength of grating in multimode graded - index fiber is linearly dependent on its temperature and axial strain and its repeatability is good
五、对多模光纤光栅的传感特性进行了实验研究与理论分析，结果表明这种光栅三个反射峰的布喇格波长随温度和轴向应变变化均呈现出良好的线性关系，并且重复性相当好。 |
| 10. | The fiber grating - pair are respectively written on the opposite surfaces of the cantilever beam , and by measuring wavelength shift of the two peaks of fbg , strain and temperature can be determined simultaneously . compared with some other schemes , the scheme uses only one set of laser - house and wavelength detection equipment , and the photic route gives more facilities for the practical application , and it ' s cost is cheaper
用于同时传感温度与应变的光纤光栅分别写于悬臂梁的上下两面，通过监测两个反射峰的波长移动便可实现温度与应变的同时测量。此方案相比于其他一些解决方案，只需要一套光源和波长检测装置，光路更简单可靠，成本也更小，因而具有一定的实用价值。 |
