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11 条记录 (耗时 0.015 秒)

    Fast, environmentally-stable fiber switches using a Sagnac interferometer
    2.
    发明授权
    Fast, environmentally-stable fiber switches using a Sagnac interferometer 有权

    公开(公告)号：US06584241B2

    公开(公告)日：2003-06-24

    申请号：US10072559

    申请日：2002-02-08

    申请人： Monica K. Davis ,  Michel J. F. Digonnet

    发明人： Monica K. Davis ,  Michel J. F. Digonnet

    IPC分类号： G02F1295

    CPC分类号： G02F1/3519

    摘要： A fast, environmentally-stable fiber switch uses a Sagnac interferometer having an active fiber portion located asymmetrically in the loop of the interferometer. A pump pulse is applied to the interferometric loop and acts upon the active fiber portion to cause a change in its refractive index either by a thermal effect or by a non-thermal nonlinear effect. Because the active fiber portion is located asymmetrically in the loop, the change in refractive index of the active fiber portion is seen by the clockwise propagating light signal and the counterclockwise propagating light signal at different times, thus causing a temporary difference in the phase changes experienced by the two counterpropagating light signals. The temporary difference in the phase changes causes the two light signals to combine constructively at a switched output port of the input/output coupler of the interferometric loop until the phase changes of the two signals are again the same, at which time the signals combine at an unswitched output port of the coupler. The on-time of the switch is set primarily by the length of the Sagnac loop, and the fall time, which is caused by the Sagnac architecture, can be fast, even with a relatively slow active fiber.

    Multiple-core optical fibers and associated coupling methods
    3.
    发明授权
    Multiple-core optical fibers and associated coupling methods 失效
    多芯光纤及相关耦合方法

    公开(公告)号：US6160943A

    公开(公告)日：2000-12-12

    申请号：US64363

    申请日：1998-04-22

    申请人： Monica K. Davis ,  Michel J. F. Digonnet

    发明人： Monica K. Davis ,  Michel J. F. Digonnet

    IPC分类号： G02B6/26 ,  G02B6/28 ,  G02B6/34 ,  G02B6/16

    CPC分类号： G02B6/262 ,  G02B6/02042 ,  G02B6/27 ,  G02B6/2804 ,  G02B6/2821 ,  G02B6/29332

    摘要： An optical fiber has two or more cores with respective faces on the fiber's ends. The faces are preferably oriented so that optical radiation can be coupled into or out of the individual cores, thereby permitting, for example, optical radiation from the various cores to be spatially resolved in the far field. The faces can be formed on the fiber by polishing the fiber at an angle with respect to the cores, i.e., with respect to the optical paths traversed by the optical radiation passing through the fiber.

    摘要翻译： 光纤具有两个或更多个芯，其纤维端部具有各自的面。 这些面优选地被定向成使得光辐射可以耦合到单独的芯中或从每个芯耦合，从而允许例如来自各种芯的光辐射在远场中被空间分辨。 可以通过相对于芯线以相对于通过光纤的光学辐射穿过的光路的方式抛光光纤而在光纤上形成面。

    Bulk internal bragg gratings and optical devices
    4.
    发明授权
    Bulk internal bragg gratings and optical devices 失效

    公开(公告)号：US06510264B2

    公开(公告)日：2003-01-21

    申请号：US09874721

    申请日：2001-06-05

    申请人： Venkata A. Bhagavatula ,  Nicholas F. Borrelli ,  Monica K. Davis ,  Edward F. Murphy

    发明人： Venkata A. Bhagavatula ,  Nicholas F. Borrelli ,  Monica K. Davis ,  Edward F. Murphy

    IPC分类号： G02B634

    CPC分类号： G02B6/29334 ,  C03C3/064 ,  C03C3/091 ,  C03C4/0085 ,  C03C4/04 ,  C03C4/085 ,  C03C17/3411 ,  C03C23/00 ,  C03C23/002 ,  C03C2201/21 ,  G02B6/02114 ,  G02B6/12007 ,  G02B6/124 ,  G02B6/125 ,  G02B6/29319 ,  G02B2006/12147

    摘要： The present invention provides photonic devices utilized in optical telecommunications. The photonic devices include photosensitive bulk glass bodies which contain Bragg gratings, particularly with the ultraviolet photosensitive bulk glass bodies directing optical telecommunications wavelength range bands. Preferably the ultraviolet photosensitive bulk glass bodies are batch meltable alkali boro-alumino-silicate bulk glass bodies. The invention includes an optical communications wavelength device for use with wavelength range bands, with the device comprising an input optical waveguide collimator for collimating an input light beam out of an optical waveguide to provide an unguided input light beam including at least one reflective wavelength range band &lgr;R and at least one wavelengths range band &lgr;n; an internal bulk Bragg grating including a transparent photosensitive bulk optical grating medium with an internal modulated refractive index grating with a grating pattern for reflecting the at least one wavelength range band &lgr;R; at least one output coupler for outputting an at least one output wavelength range band; and a substrate structure for securing said bulk Bragg grating relative to the input collimator and the output coupler, with the bulk Bragg grating disposed in the unguided input light beam wherein the at least one wavelengths range band &lgr;n is transmitted through the bulk Bragg grating and the at least one wavelength range band &lgr;R is reflected by the bulk Bragg grating.

    Method for manufacturing optical gratings
    7.
    发明授权
    Method for manufacturing optical gratings 失效
    光栅制造方法

    公开(公告)号：US06739154B2

    公开(公告)日：2004-05-25

    申请号：US09840856

    申请日：2001-04-24

    申请人： Monica K. Davis

    发明人： Monica K. Davis

    IPC分类号： C37B3707

    CPC分类号： G02B6/02123

    摘要： A method for manufacturing an optical grating on a length of optical fiber having input and output ends. Guided light is conducted into the input end of the fiber and light reflected back from the output end is measured with an optical sensor. An optical grating is formed in the fiber between the input and output ends and guided light is conducted into the input end of the fiber and light reflected back from the grating is measured with an optical sensor. Measured light is compared to determine a percentage of guided light reflected back from the grating.

    摘要翻译： 一种用于在具有输入和输出端的光纤长度上制造光栅的方法。 引导光被传导到光纤的输入端，用光学传感器测量从输出端反射的光。 光纤在输入端和输出端之间的光纤中形成，导光被传导到光纤的输入端，用光学传感器测量从光栅反射的光。 比较测量光以确定从光栅反射回来的引导光的百分比。

    Making a photosensitive fiber with collapse of a MCVD tube that is in a small positive pressure atmosphere
    8.
    发明授权
    Making a photosensitive fiber with collapse of a MCVD tube that is in a small positive pressure atmosphere 失效
    制造感光纤维，其处于小正压气氛中的MCVD管的塌陷

    公开(公告)号：US06705123B2

    公开(公告)日：2004-03-16

    申请号：US09821474

    申请日：2001-03-30

    申请人： Monica K. Davis ,  Gang Qi

    发明人： Monica K. Davis ,  Gang Qi

    IPC分类号： C03B37027

    CPC分类号： C03B37/027 ,  C03B37/01869 ,  C03B2201/10 ,  C03B2201/31 ,  C03B2205/40 ,  G02B6/02114

    摘要： The present invention includes a method of making a preform for an enhanced photosensitive fiber comprising depositing successive layers of optical material the inside a tube using modified chemical vapor deposition, and collapsing the layers of optical material in a reducing atmosphere with a positive pressure. The present invention also includes a method of making an enhanced photosensitive fiber comprising making a preform using modified chemical vapor deposition wherein the preform is collapsed in a reducing atmosphere with a positive pressure and drawing the preform into a fiber.

    摘要翻译： 本发明包括一种制备用于增强感光纤维的预成型体的方法，包括使用改进的化学气相沉积在管内部沉积连续的光学材料层，并在正压下还原气氛中折叠光学材料层。 本发明还包括一种制备增强感光纤维的方法，其包括使用改进的化学气相沉积法制备预成型体，其中预成型件在正压的还原气氛中塌陷并将预成型件拉伸成纤维。

    Fast, environmentally-stable fiber switches using a Sagnac interferometer
    10.
    发明授权
    Fast, environmentally-stable fiber switches using a Sagnac interferometer 有权
    使用Sagnac干涉仪的快速，环保的光纤开关

    公开(公告)号：US06393167B1

    公开(公告)日：2002-05-21

    申请号：US09215403

    申请日：1998-12-18

    申请人： Monica K. Davis ,  Michel J. F. Digonnet

    发明人： Monica K. Davis ,  Michel J. F. Digonnet

    IPC分类号： G02B626

    CPC分类号： G02F1/3519

    摘要： A fast, environmentally-stable fiber switch uses a Sagnac interferometer having an active fiber portion located asymmetrically in the loop of the interferometer. A pump pulse is applied to the interferometric loop and acts upon the active fiber portion to cause a change in its refractive index either by a thermal effect or by a non-thermal nonlinear effect. Because the active fiber portion is located asymmetrically in the loop, the change in refractive index of the active fiber portion is seen by the clockwise propagating light signal and the counterclockwise propagating light signal at different times, thus causing a temporary difference in the phase changes experienced by the two counterpropagating light signals. The temporary difference in the phase changes causes the two light signals to combine constructively at a switched output port of the input/output coupler of the interferometric loop until the phase changes of the two signals are again the same, at which time the signals combine at an unswitched output port of the coupler. The on-time of the switch is set primarily by the length of the Sagnac loop, and the fall time, which is caused by the Sagnac architecture, can be fast, even with a relatively slow active fiber.

    摘要翻译： 快速，环境稳定的光纤开关使用具有位于干涉仪的环路中的非对称位置的有源光纤部分的Sagnac干涉仪。 泵浦脉冲被施加到干涉测量环路上并且作用在有源光纤部分上，以通过热效应或非热非线性效应引起其折射率的变化。 由于有源光纤部分不对称地位于环路中，有源光纤部分的折射率变化可以通过顺时针传播的光信号和逆时针传播的光信号在不同时间看到，从而导致经历的相位变化的暂时的差异 由两个反向传播的光信号。 相位变化的暂时差异导致两个光信号在干涉测量环路的输入/输出耦合器的切换输出端口上建构性地组合，直到两个信号的相位变化再次相同，此时信号在 耦合器的未切换输出端口。 开关的导通时间主要由Sagnac回路的长度决定，即使使用相对较慢的有源光纤，Sagnac架构引起的下降时间也会很快。