bragg frequency 中文意思是什麼
bragg frequency
解釋
布拉格頻率-
E., the carrier frequency of a gaussian beam deviates from the resonant frequency of a fabry - perot etalon ), variations of the peak intensity, the position of the peak intensity and the dwdm systems, has received considerable attention. in this work, after taking into account the wavelength - depended reflectivity distribution profile of a fiber bragg grating, the oscillation wavelength # _ ( 1 ) of long external cavity fiber bragg grat
與共振情況（即高斯光束的載波頻率與法布里一拍羅濾波器的諧振頻率一致）相比，非共振條件（即高斯光束的載波頻率與法布里一拍羅濾波器的諧振頻率存在偏差）一透射光束的峰值強度、峰值強度所對應的位置、以及光斑的大小隨入射角的變化都發生了顯著的改變。 -
In magneto - optic ( mo ) waveguids, the interaction between msws and guided optical waves ( gows ) can lead to the bragg diffraction of the gows. the resulting many new devices, such as mo modulator, optical switching, scanning, frequency spectrum analyzers, can be developed with applications to optical communication and optical information processing
在磁光波導中，靜磁波與導波光相互作用可導致導波光的bragg衍射，利用這一原理，可做成磁光調制器、光開關、掃描儀、頻譜分析儀等新型磁光bragg器件，並在光通信和光信息處理等領域有著十分廣闊的應用前景，引起人們越來越多的關注。 -
Based on the requirement and target of the projects, firstly, pcf bragg grating are investigated theoretically and experimentally. moreover, the effects of filling high refractive index material ( nematic liquid crystal, nlc ) in pcfs on the transmission mechanism and propagation properties are studied by using plane - wave method and finite - element method ( fem ), farther, several novel pcfs are proposed and designed. lastly, we propose and demonstrate a clad - pumped er3 + / yb3 + - codoped fiber laser, which integrate all performances of broad - band tunable wavelength, uniform output power spectrum, high repeat frequency and high average power to together
本論文選題于國家973 、 863以及國家自然科學基金等項目，結合課題的要求和主要目標，在對光子晶體光纖（ pcfs ）傳輸特性研究的基礎上，首先對光子晶體光纖光柵進行了理論和實驗研究;然後，採用平面波展開法和有限單元法分析了在光纖的空氣孔中填充高折射率液晶對光纖傳導機制和傳輸特性的影響，提出並設計了幾種新型光子晶體光纖;最後，提出並研製成功連續可調諧、輸出功率譜均衡的全光纖化、高功率包層泵浦鉺鐿共摻光纖激光器實驗樣機。 -
It is demonstrated that the transmission becomes tunable, depending on the thickness and the refraction index of the slabs deeply : as the thickness of lhm slab in the structure becomes wider, the bragg gap shifts toward higher frequency, in sharp contrast to its shift toward lower frequency as a result of widening the thickness of positive - index - material slab
然後利用傳輸矩陣法理論分析了這種結構的傳輸特性，證實了新帶隙的存在，同時發現結構的傳輸特性與結構組成介質的厚度以及折射率密切相關，當正折射物質的厚度增加時，傳統bragg帶隙會沿頻率軸向低頻方向移動，若為左手物質則向高頻方向移動。 -
3. according to demand of large - scale bridge and civil structure health monitor, a new type of fiber bragg grating accelerometer which has low nature frequency and high sensitivity has been come forth
3 、本文以大型橋梁和建築結構的健康監測為背景，設計了一種新型的低頻高靈敏度光纖光柵加速度傳感器。 -
In the first place, start with theoretic model of distributed fbg strain - sensing network, sensing principle of fiber bragg grating is analyzed and sensing model created. on the basis of analyzing advantages and disadvantages of several familiar multiplexing and demodulation techniques, a mixture multiplexing method that combines optical frequency domain reflectometry ( ofdr ) and wavelength division multiplexing ( wdm ) is proposed to address fbg sensing array. at the same time, tunable narrow - band light source, which is composed of wide - band light source and tunable optical filter, is adopted to demodulate multiplex signals
首先，論文從分散式光纖光柵應變傳感網路的理論模型入手，分析了光纖布拉格光柵的傳感機理，建立光纖光柵應變傳感模型；在分析比較了常見幾種復用技術和信號解調技術的優缺點基礎上，提出應用光頻域反射復用技術和波分復用技術相結合的混合復用方法來解決光纖光柵應變傳感網路的尋址問題，採用由寬帶光源和可調諧光濾波器組成的可調諧窄帶光源來解調復用信號，通過理論分析和實驗研究證實了系統方案的可行性。 -
We also describe the principle and design of bragg frequency, and present the limit to the bandwidth of the mems phase shifters. in addition, the bragg frequencies of the phase shifters using the different dimensions have been calculated
M ms移相器在整個頻段的傳輸報材小『入舊，川格里zs 」 ，在此基礎上對體性吸振動進行了初步壽命測試，對16級級狀的ml卜！
分享友人