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    • 5. 发明授权
    • Fiber optic coupling
    • 光纤耦合
    • US5408554A
    • 1995-04-18
    • US169512
    • 1993-12-17
    • Colm V. CryanDavid W. StoweDave R. Maack
    • Colm V. CryanDavid W. StoweDave R. Maack
    • G02B6/28
    • G02B6/2856
    • In one aspect, the invention concerns fused fiber optic couplers of the type formed from fibers of transparent substance each having a circular cross-section of preselected diameter. The fibers include a central fiber and at least one ring of closely packed surrounding fibers with at least some of the fibers being optical fibers that have a core and a surrounding cladding. The coupler is formed by the processes of providing the fibers, assembling them in a close-packed relationship, and heating and drawing the assembly of fibers in the close-packed region.We have discovered that the steps involved in forming such a coupler, introduce slight size variations that can seriously affect the performance of the coupler, and that these slight variations can be accommodated by slight, controlled, under-sizing of one or more of the surrounding fibers or over-sizing of the central fiber.
    • 一方面,本发明涉及由具有预定直径的圆形横截面的透明物质的纤维形成的类型的熔融光纤耦合器。 纤维包括中心纤维和至少一个紧密包装的周围纤维环,其中至少一些纤维是具有芯和周围包层的光纤。 耦合器通过提供纤维,以紧密堆积的方式组装它们的方法形成,并且加热和拉伸在紧密堆积区域中的纤维的组装。 我们已经发现,形成这种耦合器所涉及的步骤引入了可能严重影响耦合器性能的轻微的尺寸变化,并且这些微小的变化可以通过一个或多个周围环境的轻微的,受控的,不足的尺寸来适应 纤维或中心纤维的超尺寸。
    • 8. 发明授权
    • Add/drop filters and multiplexers fabricated from cladding mode couplers and fiber bragg gratings
    • 由包层模耦合器和光纤布拉格光栅制造的加/减滤波器和多路复用器
    • US06212318B1
    • 2001-04-03
    • US09421173
    • 1999-10-19
    • Colm V. Cryan
    • Colm V. Cryan
    • G02B634
    • G02B6/2932G02B6/2835G02B6/29319G02B6/29332G02B6/29383
    • An optical fiber add/drop filter includes a first and second elongate photosensitive optical fiber, each optical fiber having opposed first and second ends and including a core and a cladding. The cladding of the first optical fiber is optically coupled to the cladding of the second optical fiber at a coupler. A first fiber Bragg grating is etched into a second end of the first fiber for converting light propagating in a first direction through either of the core of cladding of the first fiber into light propagating in an opposite direction through the other of said core and cladding of said second fiber. A second fiber Bragg grating is etched into a first end of the second fiber for converting light propagating in a first direction either of the core or cladding of the second fiber into light propagating in an opposite direction through the other of the core and cladding of the second fiber. The first and second fiber Bragg gratings are located to opposite sides of the coupler. The add/drop filter of the present invention may be cascaded to form an optical add/drop multiplexer.
    • 一种光纤分插滤波器包括第一和第二细长光敏光纤,每个光纤具有相对的第一和第二端并且包括芯和包层。 第一光纤的包层在耦合器处光耦合到第二光纤的包层。 第一光纤布拉格光栅被蚀刻到第一光纤的第二端中,用于将在第一方向上传播的光通过第一光纤的包芯中的任一个转变成通过另一个所述芯和包层的相反方向传播的光 第二根纤维。 第二光纤布拉格光栅被蚀刻到第二光纤的第一端中,用于将在第二光纤的芯或包层的第一方向上传播的光转换成沿相反方向传播的光,穿过第二光纤的芯和包层中的另一个 第二根纤维。 第一和第二光纤布拉格光栅位于耦合器的相对侧。 本发明的分插滤波器可以级联以形成光分插复用器。