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    • 27. 发明授权
    • Planar waveguide optical amplifier
    • 平面波导光放大器
    • US6157765A
    • 2000-12-05
    • US184908
    • 1998-11-03
    • Allan James BruceJoseph Shmulovich
    • Allan James BruceJoseph Shmulovich
    • G02B6/10G02B6/12G02B6/122G02B6/132H01S3/063
    • G02B6/132G02B6/10G02B6/122H01S3/063G02B2006/12097G02B2006/12176
    • An improved waveguide optical amplifier having an optically transparent first cladding layer, an optically transparent film doped with an optically active material, disposed over the first cladding layer, at least one undoped optically transparent film disposed over the doped film and coating etched walls of the doped film, and an optically transparent second cladding layer disposed over the undoped film. At least a portion of the undoped film disposed immediately adjacent the doped film has an index of refraction which is closer to the index of refraction of the doped film, than to the index of refraction of the second cladding layer and preferably equal thereto. The undoped film covers surface imperfections in the etched walls of the doped film, effectively moving them from the doped film/undoped film interface to the undoped film/cladding layer interface thereby reducing scattering of the high-intensity mode field. This structure also has an advantage of concentrating the active material in the high intensity areas of the mode without affecting the mode size.
    • 一种改进的波导光学放大器,其具有光学透明的第一包层,配置有光学活性材料的光学透明膜,设置在第一包层上方,设置在掺杂膜上的至少一个未掺杂的光学透明膜,以及掺杂 膜,以及设置在未掺杂膜上的光学透明的第二包覆层。 设置在紧邻掺杂膜的未掺杂膜的至少一部分具有比第二包覆层的折射率更接近于掺杂膜的折射率的折射率,并且优选地等于其。 未掺杂的膜覆盖掺杂膜的蚀刻壁中的表面缺陷,有效地将它们从掺杂的膜/未掺杂的膜界面移动到未掺杂的膜/包层界面,从而减少高强度模场的散射。 该结构还具有将活性物质集中在模式的高强度区域中而不影响模式尺寸的优点。