尾浦 的英文怎麼說

中文拼音 [wěi]
尾浦 英文
oura
  • : 1. (水邊或河流入海的地方, 多用於地名) riverside; river mouth2. (姓氏) a surname
  1. According to the guidline, two nd : yag lasers have been designed and set up, one is end - pumped by lower output power ld using a selfoc micro lens, and the other is end - pumped by high output power ld using a pair of lenses are designed, and the characteristics such as output power and power stabilization of both solid - state lasers are investigated. thirdly, when an empty liquid crystal cell is inserted in the cavity of the nd : yag laser pumped by high power ld, the laser can operates in single axial mode. finally, according to the relationship between the laser output power and the longnitudinal a ld - end - pumped nd : yag laser sensor for displacement measurement has been investigated theoretically and demonstrated experimently, the results indicate that when the mean radius of pumping inside the laser cavity is far less than that of the oscilating laser mode, the exponential of the output power is a gauss function of the longitudinal positon of focused spot of ld pumping beam, both the measurement range and the sensitivity are dependent on the incident pumping power, as the incident pumping power is increased, the measurement range is enlarged and the sensitivity is improve d

    本文首先介紹了ld泵nd : yag激光器的發展狀況、主要特性及其應用,從四能級速率方程出發,推導了ld泵nd : yag激光器的閾值、輸出功率和斜效率的表達式,並簡述了激光器的工作原理、結構型式和倍頻方法;其次,以空間相關的速率方程為基礎,提出了ld端面泵nd : yag激光器的設計方法,給出了一定泵耦合方式下,振蕩光模尺寸、最佳輸出耦合率、泵光模尺寸、泵光焦斑位置等參數的選取依據,以此為依據,設計了自聚焦透鏡耦合小功率ld泵nd : yag激光器和透鏡組耦合高功率ld泵nd : yag激光器,對激光器的輸出功率和功率穩定性等特性進行了實驗研究;再次,在帶纖輸出的高功率ld泵nd : yag激光腔內插入一隻空液晶盒,觀察到了激光器以單縱模運轉;最後,根據泵光焦斑端面位置對激光輸出功率的影響規律,提出了ld端面泵nd : yag激光位移傳感新方法,並進行了理論和實驗研究,研究結果表明:當激光晶體內泵光平均光斑半徑遠小於振西安理工大學碩士學位論文蕩光束腰半徑時,激光輸出功率的自然指數與泵光焦斑的縱向位置成高斯變化規律,測量范圍和靈敏度依賴于泵功率,隨著泵功率的增加,測量范圍擴大,靈敏度提高,當端面泵功率為7 . 24w (最大輸出功率為1 . 926w )時,激光位移傳感器的測量范圍和靈敏度分別是13 . 045mm和0 . 148mw / pm 。
  2. In the dissertation, the author uses objective and subjective measurement respectively to compare among philips ' s 1st ( c ' s algorithm, philips ' s 2nd ic ' s algorithm and our own motion compensated algorithm. simulation shows our algorithm solves the problem of horizontal edge flicker in saa4991, alleviates the problem of " tear " in saa4992. the author also uses subjective measurement to compare among our edge - based motion adaptive de - interlacing algorithm, traditional intra - field interpolation algorithm and faroudja ' s dcdi algorithm. simulation shows our own edge - based algorithm can remove the sawtooth on the object ' s edge, and has basically reach the level of dcdi

    論文從主觀和客觀兩個角度對比分析了自有的運動補償演算法和飛利一代晶元saa4991 、二代晶元saa4992中的運動補償演算法的性能:自有演算法對于圖像的水平邊有效抑制了saa4991存在的閃爍現象,減小了saa4992存在的拖問題;自有的邊沿演算法消除了傳統演算法在物體邊沿處存在的鋸齒,可以得到清晰平滑的邊沿,基本達到了dcdi演算法的水平。
  3. Based on the character of the eof gain at 1550 nm, a laser diode ( ld ) worked at 980 nm and acted as the pumping source, a eof employed as gain medium, and a fiber grating used as reflector, an ring - cavity all - fiber laser worked at 1562. 5 nm was demonstrated with an output power of 2. 0 mw and a bandwidth of 0

    本文主要基於摻鉺光纖在1550nm波段的增益特性,利用帶纖的980nm半導體激光器作為泵源,鉺光纖作為增益介質,布拉格光纖光柵作為諧振腔反射鏡,實現了波長為1562 . 5nm的環形腔光纖激光器,得到了2mw的激光輸出。
  4. Because high power ld is low cost, easy to manipulate and has high power output, it becomes the best option for pumping source of fiber laser

    纖輸出的大功率半導體激光器具有成本低、易操作、輸出功率大等優點成為光纖激光器泵源的首選。
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