公开(公告)号：US06215924B1

公开(公告)日：2001-04-10

申请号：US09130137

申请日：1998-08-06

申请人： C. Andrew Hulse ,  Robert E. Klinger ,  Robert B. Sargent

发明人： C. Andrew Hulse ,  Robert E. Klinger ,  Robert B. Sargent

IPC分类号： G02B632

CPC分类号： G02B6/2937 ,  G02B6/2938

摘要： An optical coupler device is provided with gradient index first and second lenses, with each lens having an outer endface with one or more ports at a predetermined location defined by a waveguide such as an optical fiber. A narrow bandpass optical filter is disposed between inner endfaces of the first and second lenses. In one embodiment, the second lens is in coaxial mechanical alignment with the first lens so as to have a common optical axis. An input waveguide and an optional reflection waveguide are disposed on the outer endface of the first lens on opposite sides of the optical axis. A transmission waveguide is disposed on one side of the outer endface of the second lens and is positioned at a non-zero angle with respect to the optical axis in order to compensate for a previously unrecognized lateral beam displacement caused by the optical filter. In other embodiments, the input waveguide and optional reflection waveguide are angled, or the optical axis of the second lens is laterally offset from the optical axis of the first lens, to compensate for the lateral beam displacement and thereby improve coupling efficiency.

摘要翻译： 光耦合器件设置有梯度折射率第一透镜和第二透镜，每个透镜具有在由诸如光纤的波导限定的预定位置处具有一个或多个端口的外端面。 窄带通滤光器设置在第一和第二透镜的内端面之间。 在一个实施例中，第二透镜与第一透镜同轴地机械对准，以便具有共同的光轴。 输入波导和可选的反射波导设置在第一透镜的在光轴的相对侧上的外端面上。 传输波导设置在第二透镜的外端面的一侧上，并且相对于光轴以非零角度定位，以便补偿由光学滤波器引起的先前未识别的横向光束位移。 在其他实施例中，输入波导和可选反射波导是成角度的，或者第二透镜的光轴从第一透镜的光轴横向偏移，以补偿横向光束位移，从而提高耦合效率。