dense band 中文意思是什麼
dense band
解釋
緻密帶-
The fiber raman amplifiers ( fras ) are more and more attractive for its particular virtues such as on - line, wide band, and low noise etc, and they are very fit for dense wavelength division multiplexing ( dwdm ) system of next generation charactered by its super large capacity and long transmission distance. fras are unsubstitutable in the fields such as optical fiber communication over the ocean, long haul transmission and exploitation of the entire low - loss band of fiber
光纖拉曼放大器因其特有的在線、寬帶、低噪聲等特點而越來越被人們關注,是一種非常適合下一代超大容量、超長距離dwdm系統的光放大器,尤其是在海底跨樣光纖通信、超長距離光纖通信以及開發整個光纖低損耗窗口等方面有著不可替代的優勢。 -
Zinc oxide ( zno ) is a wide band gap ( 3. 4ev ) semiconductor with the hexagonal crystal structure ( wurtzite type ). zno thin films with the c - axis orientation perpendicular to the substrate show excellent piezo - electrical properties and are widely used in piezo - electrical filed. and the dense anjd uniform surface of the films is required when zno thin films are used as integrated functional films
Zno屬於六方晶系6mm點群,晶體在c軸垂直面上的電性和彈性都是對稱的,因而c軸擇優取向的多晶薄膜能夠具有單晶那樣的壓電性和光電性質,而具有平整均勻的表面形貌則是zno薄膜作為一種集成功能薄膜應用性能的保證。
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