junction n. 1.接合,連接,連絡。 2.接合點,交叉點,(河流的)匯合處,(鐵道的)聯軌點。 3.【電學】中繼線。 4.【物理學】接頭,結。 We effected a junction of our two armies. 我們使自己的兩支軍隊會師了。 make a junction 取得聯絡,連接起來。
In this paper , the foundamental principles of fd _ bpm ( finite - difference beam propagation method ) used to simulate and calculate the process of beam propagation is first introduced . then , the theory of boundary condition is carefully presented . based on those theories mentioned above , a new kind of fd _ bpm arithmetic is brought forward . compared with the traditional arithmetic , this one has much more advantages . in virtue of the new arithmetic , author accomplished the whole simulating designs with two kinds of optical splitter ( stright y - junction optical splitter and sine - type optical splitter ) , including propagation field simulating , vital parameter calculating , acquired some optimized waveguide parameters , and finished the template by those results at last 本文主要借助這種改進的fd _ bpm算法,對兩種結構的光分路器(直y型光分路器,上升正弦型光分路器)進行了器件設計的軟件仿真,包括對兩種結構光分路器傳輸場進行模擬,并對兩種結構光分路器的重要參數,如波導寬度,分叉角,縱橫比,損耗進行了仿真計算;得到了一些有價值的優化波導結構參數值,根據這些優化值設計制作了光刻模板。
It is composed of thirteen functin ? components including two 3 - db y - junction power splitter , two directional couplers , two waveguide attenuators and one polarizer of waveguide itself . the prominent feature of the device is that it has a beat detection function with respect to the single y - branch mioc device , and it plays an important role in improving the inertial - grade and the high precision steady - aim system because of the beat detection function . farthermore it has direct influence on the improvement of the high flexibility , shockproof and overload - resistance for the steady - aim system 器件的工作波長為1 . 3 m ,集分束器、合束器、起偏器/檢偏器、相位調制器、波導吸收器等十三個功能單元于一體,除了單y多功能集成光路器件具備的功能外,它還具有拍頻檢測功能,因而對提高慣導級和高精度穩瞄系統起著重要的作用,并直接影響著穩瞄系統的高機動性、抗沖擊力和過載能力的提高。