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27 条记录 (耗时 0.013 秒)

    Optical device with substrate and waveguide structure having thermal matching interfaces
    12.
    发明公开
    Optical device with substrate and waveguide structure having thermal matching interfaces 失效
    的光学器件衬底和波导结构，其具有匹配的热接口

    公开(公告)号：EP0697605A3

    公开(公告)日：1998-02-04

    申请号：EP95305550.6

    申请日：1995-08-09

    申请人： AT&T Corp.

    发明人： Bruce, Allan James ,  Presby, Herman Melvin

    IPC分类号： G02B6/12

    CPC分类号： G02B6/105 ,  G02B6/126 ,  G02B2006/12038

    摘要： The present invention provides polarization-independent optical devices by reducing or eliminating strain-induced birefringence associated with prior device structures. In a first embodiment, an optical device is produced comprising a doped silica substrate (20) having a coefficient of thermal expansion between 8 x 10⁻⁷°C⁻¹ and 15 x 10⁻⁷°C⁻¹. On the doped silica substrate is formed a doped silica waveguiding structure (30) having a coefficient of thermal expansion between 8 x 10⁻⁷°C⁻¹ and 15 x 10⁻⁷°C⁻¹. A cladding layer (40) is formed on the doped silica waveguiding structure. Alternatively, the coefficient of thermal expansion of the doped silica substrate is selected to be approximately 90% to 110% of the coefficient of thermal expansion of the doped silica waveguiding structure. In another aspect, the present invention provides an optical device comprising a doped silica substrate having a doping gradient from a lower surface to an upper surface. The doping level at the upper surface has a coefficient of thermal expansion approximating the coefficient of thermal expansion of a doped silica waveguiding structure formed thereon.

    Method and apparatus for connecting an optical fiber to a strip waveguide
    14.
    发明公开
    Method and apparatus for connecting an optical fiber to a strip waveguide 失效
    用于将光纤连接到一个条形波导的方法和装置。

    公开(公告)号：EP0564128A1

    公开(公告)日：1993-10-06

    申请号：EP93302068.7

    申请日：1993-03-18

    申请人： AT&T Corp.

    发明人： Dragone, Corrado ,  Presby, Herman Melvin

    IPC分类号： G02B6/30 ,  G02B6/42

    CPC分类号： G02B6/30

    摘要： This invention is directed toward joining an optical fiber to a waveguide on a silicon or silica substrate. In a preferred embodiment, a discontinuity such as a notch is provided in the substrate along each side of a waveguide. The notches, which extend back from the end of each waveguide form air gaps between the ends of adjacent waveguides. Now, when an optical fiber is butt coupled to a waveguide on a substrate with adhesive, the notches at either side of the waveguides prevent adhesive from flowing along the edge of the substrate and onto the end of an adjacent waveguide. In addition, the adhesive flows around and encapsulates the substrate projections defined by the notches along the ends of the waveguide to provide a sturdy butt connection.

    摘要翻译： 本发明是针对在硅或二氧化硅基材光纤接合到波导。 在一个优选实施例，不连续：诸如槽口在基板沿着波导的每一侧设置。 凹口，它从相邻波导的端部之间的每个波导形成气隙的端部背面延伸。 现在，当光纤被对接耦合到波导上有粘合剂的基材，在波导的两侧的缺口防止粘合剂从沿基板的边缘并到达波导的端部与相邻的流动。 此外，粘合剂周围流动并且封装由沿波导的端部凹口限定为提供一个坚固的对接基底预测。

    Method and apparatus for fabricating microlenses on optical fibers
    15.
    发明公开
    Method and apparatus for fabricating microlenses on optical fibers 失效
    Verfahren und Vorrichtung zur Fabrikation von Mikrolinsen an optischen Fasern。

    公开(公告)号：EP0391598A1

    公开(公告)日：1990-10-10

    申请号：EP90303318.1

    申请日：1990-03-28

    申请人： AT&T Corp.

    发明人： Presby, Herman Melvin

    IPC分类号： C03B37/15 ,  B23K26/08 ,  C03C23/00

    CPC分类号： G02B6/2552 ,  G02B6/4203

    摘要： This invention concerns with a process and apparatus for fabricating microlenses on optical fibers. A pulsed laser beam and an end portion of a fiber are arranged relative each to another so that the laser beam is incident on the end portion of the fiber at an acute angle ϑ to the longitudinal axis of the fiber. The angle is selected to attain a desired curvature of a lens formed by ablation and heating of the end portion of the fiber by the laser beam. A movement of the fiber and the laser relative each to another results in progressive engagement of the end portion of the fiber with the laser for a preselected distance so as to produce a short taper with a lens at the end thereof. In the preferred embodiment, the fiber rotated about its axis within a passage of the holder which moves the end-portion of the fiber into and through the laser beam resulting in the said lens. The precise repeatability of the lens formation may be controlled by a computer.

    摘要翻译： 本发明涉及用于在光纤上制造微透镜的方法和装置。 脉冲激光束和纤维的端部相对于另一个相对布置，使得激光束以与光纤的纵向轴线成锐角θ入射到光纤的端部。 选择该角度以获得通过激光束消融和加热纤维的端部而形成的透镜的期望曲率。 纤维和激光器相对于每个相对运动导致纤维的端部与激光器的预定距离的渐进接合，以便在其末端产生具有透镜的短锥度。 在优选实施例中，光纤围绕其轴线在保持器的通道内旋转，其将光纤的端部移动并穿过激光束，导致所述透镜。 透镜形成的精确重复性可以由计算机控制。

    Optical fiber signal test device
    16.
    发明公开
    Optical fiber signal test device 失效
    测试器用于光纤的信号。

    公开(公告)号：EP0230938A2

    公开(公告)日：1987-08-05

    申请号：EP87100585.6

    申请日：1987-01-17

    申请人： AT&T Corp.

    发明人： Presby, Herman Melvin

    IPC分类号： G01N21/88 ,  G01M11/00

    CPC分类号： G01M11/35 ,  G01M11/088 ,  G02B6/4201 ,  G02B6/4289 ,  H04B10/27

    摘要： The invention relates to a hand-held device for detecting whether or not an optical fiber is carrying a light signal. The device includes a spring loaded hook for grabbing an exposed optical fiber anywhere along its length, thereby introducing microbending, a photodetector for responding to the presence of light emitted in the proximity of the microbend, and a light emitting diode connected by way of an amplifierto the photodetector for indicating when a light signal has been detected. Upon release of the spring loaded hook, the fiber returns to its normal state. The device can be easily modified to indicate not only the presence of a light signal, but also the strength of the signal and the direction in which the signal is being transmitted.

    Expanded end optical fiber and associated coupling arrangements
    17.
    发明公开
    Expanded end optical fiber and associated coupling arrangements 失效
    膨胀的纤维端，并在此实现交换网络。

    公开(公告)号：EP0220439A2

    公开(公告)日：1987-05-06

    申请号：EP86112380.0

    申请日：1986-09-08

    申请人： AT&T Corp.

    发明人： Amitary, Noach ,  Presby, Herman Melvin

    IPC分类号： G02B6/26 ,  G02B6/28 ,  G02B6/38

    CPC分类号： G02B6/389 ,  G02B6/2817 ,  G02B6/3831 ,  G02B6/3869 ,  G02B6/3897 ,  G02B6/4203

    摘要： An optical fiber is disclosed which comprises (a) a central core section (4) of constant thickness which terminates in an outwardly gradually expanded end section (3), and (b) a cladding layer (5) enveloping the core. Both the core and the cladding layer are of constant compositions throughout the fiber's length and width. Additionally, the difference between the refractive indices of the core and the cladding layer remains constant throughout the length of the fiber. Where the core gradually increases in width in the outwardly expanded end section of the fiber, the V number normalized frequency increases in like manner. In such optical fiber, propagation of a predetermined mode or modes is maintained throughout the entire length of the fiber, so long as the expansion of the end section occurs gradually over the order of many wavelengths.