公开(公告)号：US20070110353A1

公开(公告)日：2007-05-17

申请号：US11274649

申请日：2005-11-15

申请人： Edward Sargent

发明人： Edward Sargent

IPC分类号： G02F1/295 ,  G02B6/34 ,  G02B6/26 ,  G02B6/42

CPC分类号： G02B6/02195 ,  G02B6/29319 ,  G02B6/29322 ,  G02B6/29395 ,  G02F1/313 ,  G02F2201/307 ,  G02F2203/585

摘要： A wavelength selective switch device is disclosed that includes an elongated signal communication path extending from a first end of the device to a second end of the device. The signal communication path extends through a plurality of regions of varying indices of refraction, and the plurality of regions includes adjustable regions that are each coupled to an adjustable voltage source for changing a voltage potential across each of the adjustable regions such that the index of refraction of said adjustable regions may be changed by changing the voltage potential across each adjustable region.

摘要翻译： 公开了一种波长选择开关装置，其包括从装置的第一端延伸到装置的第二端的细长的信号通信路径。 信号通信路径延伸穿过多个具有不同折射率的区域，并且多个区域包括可调节区域，每个可调节区域耦合到可调电压源，用于改变跨越可调节区域的电压电位，使得折射率 可以通过改变每个可调节区域上的电压电位来改变所述可调节区域。

公开(公告)号：US07174070B2

公开(公告)日：2007-02-06

申请号：US10883955

申请日：2004-07-01

申请人： Dong Churl Kim ,  Dae Su Yee ,  Young Ahn Leem ,  Kyung Hyun Park

发明人： Dong Churl Kim ,  Dae Su Yee ,  Young Ahn Leem ,  Kyung Hyun Park

IPC分类号： G02B6/26

CPC分类号： H01S5/146 ,  G02B6/02195 ,  G02B6/2804 ,  G02B6/2813 ,  H01S5/0612 ,  H01S5/0623 ,  H01S5/1003 ,  H01S5/1096 ,  H01S5/141

摘要： A light source has a structure in which a 3-dB beam splitter is integrated with a Febry-Perot laser diode having a cleaved plane. A first waveguide grating and a first refractive index modifier changing a Bragg wavelength of the first waveguide grating are provided at one branch of the 3-dB beam splitter. A second waveguide grating and a second refractive index modifier changing a Bragg wavelength of the second waveguide grating are provided at another branch of the 3-dB beam splitter.

摘要翻译： 光源具有其中3分贝分束器与具有劈开平面的Febry-Perot激光二极管集成的结构。 改变第一波导光栅的布拉格波长的第一波导光栅和第一折射率修正器设置在3-dB分束器的一个分支处。 改变第二波导光栅的布拉格波长的第二波导光栅和第二折射率修正器设置在3-dB分束器的另一分支处。

公开(公告)号：US06950578B1

公开(公告)日：2005-09-27

申请号：US10856912

申请日：2004-05-28

申请人： Siddharth Ramachandran

发明人： Siddharth Ramachandran

IPC分类号： G01D5/353 ,  G01K11/32 ,  G02B6/02 ,  G02B6/26 ,  G02B6/34 ,  G02F1/01

CPC分类号： G02B6/02195 ,  G01D5/35303 ,  G01K11/3206 ,  G02B6/02095 ,  G02F1/0115 ,  G02F2201/302

摘要： A long period fiber grating (LPG) device is formed to exhibit a “turn-around-point” (TAP) in a phase matching curve when the group velocities of two propagating modes are matched. When the grating period of the LPG is selected to coincide with the TAP, a large tuning bandwidth is formed. This device has been found to be highly sensitive to changes in the refractive index of the ambient surrounding the LPG (recognizing a change in refractive index as low as 10−4), allowing the device to be used as a sensor for trace elements in the atmosphere. The ability of the TAP LPG to modify the intensity of a propagating optical signal as a function of changes in the refractive dielectric of a surround material also allows for this device to be used as an all-fiber high speed optical signal modulator.

摘要翻译： 当两个传播模式的组速度匹配时，长周期光纤光栅（LPG）器件形成为在相位匹配曲线中呈现“转折点”（TAP）。 当选择LPG的光栅周期与TAP一致时，形成大的调谐带宽。 已经发现该装置对于围绕LPG的周围环境的折射率的变化（识别低至10-4的折射率的变化）非常敏感，允许将该装置用作 用于大气中微量元素的传感器。 TAP LPG改变作为环绕材料的折射介质的变化的传播光信号的强度的能力也允许该器件用作全光纤高速光信号调制器。

公开(公告)号：US06915028B2

公开(公告)日：2005-07-05

申请号：US10665487

申请日：2003-09-22

申请人： Donald R. Lyons

发明人： Donald R. Lyons

IPC分类号： A61B5/026 ,  G01F1/66 ,  G01P5/26 ,  G02B6/28 ,  G02B6/00

CPC分类号： G01F1/661 ,  A61B5/0261 ,  G01P5/26 ,  G02B6/02066 ,  G02B6/02195 ,  G02B6/2852

摘要： An evanescent filed based sensor uses a detector for sensing variations in properties of a fluid flowing in a boundary layer adjacent to the detector. The detector comprises an optical waveguide in the form of an optical fiber having a core layer covered by a cladding layer and having a substantially D-shaped cross section defining a planar surface with an optical grating pattern thereon. When a beam of laser light is directed through the detector as an input, variations in an output of the beam of laser light are indicative of changes in fluid pressure or density in the boundary layer or immediate region adjacent to the grating of the optical waveguide.

摘要翻译： 基于消逝场的传感器使用检测器来感测在与检测器相邻的边界层中流动的流体的性质的变化。 检测器包括光纤形式的光波导，其具有由包层覆盖的芯层，并且具有限定其上具有光栅图案的平面的大致D形横截面。 当激光束通过检测器作为输入时，激光束的输出的变化表示边界层或与光波导的光栅相邻的紧邻区域的流体压力或密度的变化。

公开(公告)号：US06873765B2

公开(公告)日：2005-03-29

申请号：US10412301

申请日：2003-04-14

申请人： Hedi Labidi ,  Carlos De Barros ,  Hervé Loury ,  Xavier Bonnet ,  Isabelle Riant ,  Jean-Jacques Guerin

发明人： Hedi Labidi ,  Carlos De Barros ,  Hervé Loury ,  Xavier Bonnet ,  Isabelle Riant ,  Jean-Jacques Guerin

IPC分类号： G02B6/34 ,  H01S3/00 ,  H01S3/067 ,  H04B10/294

CPC分类号： G02B6/02195 ,  G02B6/02095 ,  H01S3/005 ,  H01S3/06754 ,  H01S2301/04 ,  H01S2301/06 ,  H04B10/2941

摘要： A tuneable optical fibre comprising a long-period Bragg grating (5) written in a portion of an optical waveguide (10) comprising a core and an optical cladding (11), characterised in that the portion of the waveguide comprising the grating (5) is at least partially immersed in an external environment consisting of two distinct sections, a first section (1) whose refractive index is higher than that of the optical cladding (11) and a second section (2) whose refractive index is lower than that of the optical cladding (11), the long-period grating being at least partially immersed in one of the said sections so as to almost independently tune the wavelength and/or the contrast of the spectral response of the filter.

摘要翻译： 一种可调谐光纤，包括写入包括芯和光学包层（11）的光波导（10）的一部分中的长周期布拉格光栅（5），其特征在于，包括光栅（5）的波导部分 至少部分地浸没在由两个不同部分组成的外部环境中，第一部分（1）的折射率高于光学包层（11）的折射率，第二部分（2）的折射率低于 所述光学包层（11），所述长周期光栅至少部分地浸没在所述部分之一中，以便几乎独立地调节所述滤光器的光谱响应的波长和/或对比度。

公开(公告)号：US20050041922A1

公开(公告)日：2005-02-24

申请号：US10946665

申请日：2004-09-21

申请人： Xiaotian Yao

发明人： Xiaotian Yao

IPC分类号： G02B6/02 ,  G02B6/26 ,  G02B6/28 ,  G02B6/34 ,  G02B6/00

CPC分类号： G02B6/02071 ,  G02B6/02047 ,  G02B6/02061 ,  G02B6/02195 ,  G02B6/266 ,  G02B6/2706 ,  G02B6/274 ,  G02B6/276 ,  G02B6/2861 ,  G02B6/2932 ,  G02B6/29322

摘要： A system for filtering light propagating in a waveguide is described. The system utilizes an adjustable periodic grating which induces mode coupling of predetermined frequencies of light propagating in the waveguide.

摘要翻译： 描述了用于过滤在波导中传播的光的系统。 该系统利用可调周期性光栅，其引起在波导中传播的预定频率的光的模式耦合。

公开(公告)号：US20040151434A1

公开(公告)日：2004-08-05

申请号：US10760398

申请日：2004-01-21

申请人： Photintech Inc.

发明人： Tigran Galstian ,  Armen Zohrabyan ,  Dany Dumont ,  Amir Tork ,  Rouslan Birabassov

IPC分类号： G02B006/34

CPC分类号： G02B6/02066 ,  G02B6/02061 ,  G02B6/02085 ,  G02B6/02195 ,  G02B6/266 ,  G02B6/2826 ,  G02B6/29334 ,  G02B6/29391 ,  G02B2006/12107 ,  G02F1/011 ,  G02F1/1326 ,  G02F2201/307 ,  G02F2203/055

摘要： A variable optical device for selectively controlling propagation of light within an optical waveguide. The optical device comprises: a relief modulation defining a grating disposed proximal the waveguide and having a respective grating index of refraction nG; a matrix surrounding at least the relief modulation, the matrix having an index of refraction nEO that is controllable, in response to a selected stimulus between a first value that is substantially equal to the grating index of refraction nG, and a second value that is different from nG; and at least one electrode for supplying the selected stimulus to the matrix-grating system.

摘要翻译： 一种用于选择性地控制光波导内的光的传播的可变光学装置。 光学装置包括：浮雕调制，其限定设置在波导附近并具有各自的光栅折射率nG的光栅; 至少围绕所述释放调制的矩阵，所述矩阵具有响应于基本上等于所述光栅折射率nG的第一值之间的所选择的激励而具有可控制的折射率nEO，以及不同于第二值的第二值 来自nG 以及用于将所选择的刺激提供给矩阵 - 光栅系统的至少一个电极。

公开(公告)号：US06768835B2

公开(公告)日：2004-07-27

申请号：US10234289

申请日：2002-09-04

申请人： Siddharth Ramachandran

发明人： Siddharth Ramachandran

IPC分类号： G02B626

CPC分类号： G02F1/0115 ,  G02B6/02023 ,  G02B6/02095 ,  G02B6/02195 ,  G02B6/02204 ,  G02B6/14 ,  G02B6/29319 ,  G02B6/29376 ,  G02B6/29394 ,  G02F1/0134 ,  G02F1/0147 ,  G02F2201/305

摘要： The specification describes optical mode converters wherein coupling is made between a fundamental, or near fundamental, propagation mode and the next, or closely adjacent, higher order mode (HOM). Both modes propagate in the core of the optical fiber, thus maintaining efficient transmission through the mode converter. Mode coupling is effected using a long period grating (LPG) and the strength of the mode coupling is dynamically varied by changing the period of the grating or by varying the propagation constants of the two modes being coupled. The period of the grating is varied by physically changing the spacing between grating elements, for example by changing the strain on the grating to physically stretch the LPG. The propagation constants of the modes can be varied using any method that changes the refractive index of the fiber containing the LPG, for example, by changing the temperature, or electrically changing the index using the electro-optic effect. In every case the two modes being coupled are core modes with high propagation efficiency.

摘要翻译： 本说明书描述了光模式转换器，其中耦合在基本传播模式和接近基波传播模式之间进行，并且与下一个或接近相邻的高阶模式（HOM）进行耦合。 两种模式在光纤的核心中传播，从而保持通过模式转换器的有效传输。 使用长周期光栅（LPG）实现模式耦合，并且通过改变光栅的周期或通过改变耦合的两种模式的传播常数来动态地改变模式耦合的强度。 通过物理地改变光栅元件之间的间距来改变光栅的周期，例如通过改变光栅上的应变以物理拉伸LPG。 可以使用任何改变包含LPG的纤维的折射率的方法来改变模式的传播常数，例如通过改变温度，或者使用电光效应来电子地改变指数。 在每种情况下，耦合的两种模式是具有高传播效率的核心模式。

公开(公告)号：US06707966B1

公开(公告)日：2004-03-16

申请号：US09567752

申请日：2000-05-10

申请人： Jerrold A. Cline ,  Glenn E. Kohnke

发明人： Jerrold A. Cline ,  Glenn E. Kohnke

IPC分类号： G02B634

CPC分类号： G02B6/02195 ,  G02B6/02095 ,  G02B6/02109

摘要： A long-period fiber grating includes a fiber having a core surrounded by a cladding, and a plurality of refractive index variations periodically spaced along the longitudinal axis of a portion of the core of the fiber. The fiber is twisted throughout at least a portion of its length that includes the plurality of refractive index variations. By twisting the long-period fiber grating, polarization dependent loss is reduced by as much as 30 percent. Also, the peak wavelength of the light propagating through the long-period fiber grating that is coupled into the cladding of the fiber may be adjusted. The peak wavelength may be adjusted in as little as 0.1 nm increments by twisting the long-period fiber grating after the grating has been written and annealed.

摘要翻译： 长周期光纤光栅包括具有被包层包围的芯的光纤，以及沿着光纤的芯部的一部分的纵向轴向间隔开的多个折射率变化。 纤维在其包括多个折射率变化的长度的至少一部分上被扭曲。 通过扭转长周期光纤光栅，偏振相关损耗减少多达30％。 此外，可以调节通过耦合到光纤的包层中的长周期光纤光栅传播的光的峰值波长。 通过在光栅被写入和退火之后扭转长周期光纤光栅，峰值波长可以以0.1nm的增量调节。

公开(公告)号：US06650799B2

公开(公告)日：2003-11-18

申请号：US09953910

申请日：2001-09-18

申请人： Donald R. Lyons

发明人： Donald R. Lyons

IPC分类号： G02B600

CPC分类号： G01F1/661 ,  A61B5/0261 ,  G01P5/26 ,  G02B6/02066 ,  G02B6/02195 ,  G02B6/2852

摘要： An evanescent filed based sensor uses a detector for sensing variations in properties of a fluid flowing in a boundary layer adjacent to the detector. The detector comprises an optical waveguide in the form of an optical fiber having a core layer covered by a cladding layer and having a substantially D-shaped cross section defining a planar surface with an optical grating pattern thereon. When a beam of laser light is directed through the detector as an input, variations in an output of the beam of laser light are indicative of changes in fluid pressure or density in the boundary layer or immediate region adjacent to the grating of the optical waveguide.