photorefractive crystal 中文意思是什麼

photorefractive crystal 解釋
光折射晶體
  • photorefractive : 光致折變的
  • crystal : n 1 結晶，（結）晶體；晶粒；水晶（＝rock crystal）；石英。2 【無線電】晶體。3 結晶玻璃；雕玻璃；...
  1. Then we turned in the input laser to observe the decline of phase conjugate reflectivity. measuring dark storage time, we found that the phase conjugate reflectivity declined to 50 % of steady - state value when photorefractive crystal was in dark condition for 30 minutes. even after 9 hours, there still existed remaining reflectivity, which could n ' t be measured by our detector

    因而研究了晶體內位相共軛光柵存儲特性，即觀察位相共軛光柵形成后在黑暗條件下能存儲的時間，實驗結果得出位相共軛光柵在黑暗中30分鐘后，位相共軛反射率下降到原來的50 ，而在黑暗中9小時后，位相共軛光非常微弱，無法測出。
  2. The centre of the dark sector soliton evolution equation is derived by means of particle analytical method, equivalent form dark soliton ' s evolution equation in the photorefractive crystal, esceptialy between tow dark soliton ; the potential expression and it ' s numerically calculation is achieved, the conclusion is drawn : when the distance between two dark soliton = 0, its potential function has minimum, shows there is an stead soliton in the photorefractive maternal, and interaction between two dark soliton raches biggest ; when the distance between two dark soliton 5, its potential function is nearly equal zero, shows that the interaction between two lark soliton is very weak, nearly zero

    摘要本文從光折變晶體中能得出暗孤子所滿足的演化方程出發，用粒子分析力法得出了兩暗孤子相互作用時，其質心間的距離所滿足的演化方程，並得出了兩暗孤子相互作用勢函數的表達式，得到其數值解，並得出如下結論：當兩暗孤子間距離= 0時，其相互作用勢函數有最小值，表示在光折變晶體中有穩定的暗孤子對，並且相互作用達到最大；當兩暗孤子距離5時，其相互作用勢函數幾乎為零，表示兩暗孤子間相互作用很弱，幾乎為零。
  3. ( 1 ) effects of externally applied electric fields on photorefractive two - beam coupling are analyzed. theoretic dependence of the intensity gain factor on applied field e0 in sbn : 60 is presented. and the experimental results obtained in two sbn : 61 : cr crystal samples with different dopant concentration show clearly that for properly applied fields, a larger f can be achieved effectively than that obtained with no field applied

    由兩塊不同摻cr濃度的sbn 61 cr晶體得到的實驗結果同時表明，適當的外電場作用能夠有效提高晶體的二波耦合增益，並且，外電場的作用使晶體的響應速度大大提高，而晶體的最佳耦合角與外電場之間沒有明顯的依賴關系。
  4. Based on the band transport model, the formation of refractive index grating in photorefractive crystal is discussed firstly. then the characteristics of two - wave coupling, four - wave mixing and light - induced scattering are analyzed

    本文主要從實驗上研究了cu ： knsbn晶體的自泵浦相位共軛特性及cr ： sbn晶體的四波混頻相位共軛特性及其應用。
  5. ( 3 ) we explore photorefractive screening solitons and characters of beam transmission in sbn : 61 : cr crystals. the dependence of beam diameter at the crystal output face on applied field is presented. and influences of the limiting space charge field of the crystals on the experimental results are analyzed

    （ 3 ）初步研究了兩塊不同摻cr濃度的sbn 61 cr晶體中的屏蔽型空間孤子效應，以及不同外加直流電場作用下光束在晶體中的傳輸，給出了晶體出射表面處光斑直徑隨外電場的變化曲線，並分析了晶體中空間電荷場的飽和效應對實驗結果的影響。
  6. The joint transform correlator ( jtc ) is paid more attention by researchers than the matched filtering correlator ( mfc ) with its advantages, such as high spatial bandwidth product, without integrated filtering and real - time operation etc. photorefractive crystals have some advantages, such as fast response, high spatial resolution and large storage capacity etc. we can exert both advantages by combining the photorefractive crystal with the jtc

    與匹配濾波相關器相比，聯合變換相關器具有諸多優點，如空間帶寬積高、無需濾波綜合、易於實時操作等，所以近年來更加引起人們的研究興趣。光折變晶體具有響應速度快、空間解析度高、存儲容量大等優點。將光折變晶體與聯合變換相關器相結合構成光折變聯合變換相關器，就可以充分發揮二者的優勢。
  7. The feasibility of the multiple photorefractive volume applying to wdm system is demonstrated by analyzing the diffractive properties of the eight holographic gratings superimposed in the linbo3 : fe crystal

    通過對10 10 10mm ~ 3塊狀linbo _ 3 : fe晶體中用角度復用技術寫入的8重體光柵的衍射特性分析，證實了光寫入多重體光柵應用於波分復用系統的可行性。
  8. The angular multiplexing technology for photorefractive grating and exposure technology in the formation of photorefractive multiple volume gratings are further discussed, by which eight photorefractive volume gratings in a linbo3 : fe crystal sample with size of 10x10x 10mm3 have been successfully recorded

    進而探討了體光柵的角度復用技術和多重體光柵寫入過程中的曝光技術，用循環曝光法在10 10 10mm ~ 3的塊狀晶體中成功地寫入了8重衍射效率相近的光折變體光柵。
  9. ( 5 ) we present a photorefractive two - beam coupling jtc, in which a knsbn : cu crystal is used to a square - law converter by the nonlinear energy transfer property of the photorefractive two - beam coupling

    （ 5 ）利用knsbn ： cu晶體作為平方律轉換器件，實現實時的功率譜轉換，從而實現聯合變換相關識別。
  10. ( 2 ) taking the nonlinear energy transfer property of the photorefractive two - beam coupling in the sbn : 61 crystal doped with 1000ppm cr and the knsbn crystal doped with 0. 07wt % ce, edge - enhancement preprocessing can be achieved, which will results in the larger normalized intensity and narrower width of the correlation peaks. and the discrimination of the jtc is greatly improved

    （ 2 ）利用sbn ： 61 ： cr晶體（ 1000ppm ）和knsbn ： ce晶體（ 0 . 07wt ）的二波耦合能量非線性轉移特性，對聯合變換相關器的輸入圖像進行邊緣增強預處理，提高了相關峰的歸一化強度，減小了相關峰的半寬度，從而大大提高了相關器的識別能力。
  11. The theory of optical interference is analyzed, the measurement of small out - of - plane vibrations in quasi real time using a photorefractive crystal as a medium for recording interference fringes is discussed

    摘要利用光的干涉原理，分析了應用光折變晶體記錄干涉條紋在準實時、離面小振幅振動時的測量方法，並給出了計算機模擬結果。
  12. Nonlinear properties of the cr : knsbn photorefractive crystal

    光折變晶體的非線性特性
  13. Study of non - single signal light chosen to undertakephase conjugation using photorefractive crystal

    對非單一信號光用光折變晶體選擇相位共軛研究
  14. Finally modulation of solitary evolution of gaussian beams is discussed, and the results show that changing the load resistance can make a gaussian beam evolve into a stable bright soliton when propagating in a biased photovoltaic - photorefractive crystal

    最後研究了光伏光折變晶體中高斯光束演化特性調節，結果表明調節分壓電阻，可以使在晶體中傳播不穩定的高斯光束趨于穩定的明孤子波。
  15. The characteristics of competition and coexistence of self - pumped phase conjugation ( sppc ) and mutually pumped phase conjugation ( mppc ) in the photorefractive ( pr ) crystal are studied, with the physical mechanism analyzed

    本文研究了光折變晶體內自泵浦相位共軛（ sppc ）與互泵浦相位共軛（ mppc ）相互競爭、同時共存的特性，分析了其物理形成機制。
  16. In photorefractive crystal light illumination changes the refractive index of the crystal due to linear electrooptical effect, which in turn changes the light distribution. as a result of the development of this process, a beam, called the phase conjugation wave, leaves the crystal back along the direction of the incident beam and is its phase conjugate replica

    光折變晶體在光輻照下，通過晶體中的線性電光效應而產生折射率隨光強的空間分佈而變化，即在晶體內建立起體相位柵。
  17. The effects of the higher - order terms on the self - deflection process of photorefractive bright solitons in a crystal are also investigated. compared the results of first - order diffusion term acting alone with both the first - order diffusion term and the higher - order space charge field terms acting together, the screening solitons always bend right, whereas for the self - deflection of the photovoltaic bright solitons and the screening - photovoltaic bright solitons both bending right or left is possible, and it is possible that no self - deflection process occurs

    然後考慮到高階擴散項和高階電荷場對明孤子的影響，發現當外電場很強時，與只考慮一階擴散項作用的結果相比，屏蔽明孤子的偏轉量會增大，而光伏和屏蔽光伏明孤子的偏轉量有時會增大有時會減小，在一定條件下也會消失。
  18. The experiment results demonstrate that sbn crystal has high photorefractive sensitivity and rapid response. so the array waveguides written into the doped sbn crystals have important applications in spatial optical dynamic interconnections and light - light modulations

    實驗表明， sbn晶體具有較高的光折變靈敏度和較快的響應速度，在其中寫入的陣列平面波導對于實現空間動態光互聯和光光調制的應用研究具有十分重要的意義。
  19. Also the optical correlator and pattern recognition are discussed. with the horizontal and vertical angular multiplexing technique, 1020 chinese images, divided into 17 lines and 60 rows, are stored onto the same point of photorefractive crystal fe : linbo3

    本論文利用水平和垂直的角度復用技術，將1020幅漢字全息圖，按17行60列的方式，存儲到光折變晶體摻鐵鈮酸鋰（ fe : linbo _ 3 ）的同一點上。
  20. In this paper we present the theory of the formation of photorefractive gratings and its filtering mechanism, and discuss the recording method in linbo3 : fe crystal and its application in demultiplexing system. the main contents are following : ( 1 ) the formation mechanism, diffraction efficiencies and wavelength sensitivity of the photorefractive volume grating in photorefractive crystals are theoretically analyzed

    本文主要從理論上分析了光折變光柵的形成機理和多重光折變體光柵的濾波原理，並從實驗上探討了在linbo _ 3 : fe晶體中寫入光折變體相位光柵的方法及其在波分解復用系統的應用。
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