公开(公告)号：US06697541B1

公开(公告)日：2004-02-24

申请号：US09569647

申请日：2000-05-12

申请人： Gang Chen ,  Steven B. Dawes ,  Glenn E. Kohnke ,  Laura A. Weller-Brophy

发明人： Gang Chen ,  Steven B. Dawes ,  Glenn E. Kohnke ,  Laura A. Weller-Brophy

IPC分类号： G02F1295

CPC分类号： G02B6/02204 ,  G02B6/02095

摘要： A dynamically tunable filter controls the magnitude of couplings between core and cladding modes of a waveguide by surrounding the waveguide with an overcladding having an adjustable refractive index. The coupled modes are attenuated along the core to produce the desired spectral response. The adjustment to the overcladding index is made in a range that is above the refractive index of the underlying cladding to vary amplitudes of attenuated bands of wavelengths without shifting central wavelengths of the bands.

摘要翻译： 动态可调滤波器通过用具有可调折射率的外包围围绕波导来控制波导的芯和包层模式之间的耦合的大小。 耦合模式沿核心被衰减以产生期望的光谱响应。 对包层指数的调整在高于基底包层的折射率的范围内进行，以改变衰减的波长带的幅度，而不会移动带的中心波长。

公开(公告)号：US20040028361A1

公开(公告)日：2004-02-12

申请号：US10436623

申请日：2003-05-13

发明人： Julia Farroni ,  Kanishka Tankala ,  Adrian Carter ,  Nils Jacobson

IPC分类号： G02B006/02

CPC分类号： G02B6/0219 ,  G02B6/02095

摘要： An optical fiber for use in making components of an optical communication system has cladding and core materials the constituents of which cause a component made from the fiber to have a rate of change with respect to temperature of a response to a signal which passes through zero at a temperature Tm, where the temperature Tm is at or near a selected temperature, or falls within a selected temperature range; and the value of Tm of a fiber can be controllably changed by changing the concentration of a selected constituent of the fiber, such as, for example, the concentration of boron.

摘要翻译： 用于制造光通信系统的组件的光纤具有包层和芯材料，其成分使得由光纤制成的部件相对于对通过零的信号的响应的温度具有变化率 温度Tm，其中温度Tm处于或接近选定温度，或落在所选择的温度范围内; 通过改变所选择的纤维成分的浓度，例如硼的浓度，可以可控地改变纤维的Tm值。

公开(公告)号：US20030133653A1

公开(公告)日：2003-07-17

申请号：US10330145

申请日：2002-12-30

申请人： ALCATEL

发明人： Carlos De Barros ,  Hedi Labidi ,  Xavier Bonnet ,  Isabelle Riant

IPC分类号： G02B006/26

CPC分类号： G02B6/29352 ,  G02B6/02095 ,  G02B6/29319 ,  G02B6/29356 ,  G02B2006/12107

摘要： An optical filter includes a coupler having n output branches and an input branch receiving an input signal whose spectrum comprises a comb of wavelengths periodically spaced by a spacing eP. Each of the n output branches is coupled to a waveguide including two or more cascaded copropagated coupling components. Each of the n branches produces an output signal whose spectrum comprises a comb of wavelengths periodically spaced by a spacing equal to n times the spacing eP. Each of the n output signal spectra is complementary to the others.

摘要翻译： 光学滤波器包括具有n个输出分支的耦合器和接收输入信号的输入分支，该输入信号的频谱包括以间隔eP周期间隔的波长梳。 n个输出分支中的每一个耦合到包括两个或更多个级联的共同传播的耦合部件的波导。 n个分支中的每一个产生输出信号，其频谱包括周期性间隔等于间隔eP的n倍的间隔的波长梳。 n个输出信号光谱中的每一个与其他信号光谱互补。

公开(公告)号：US06498877B1

公开(公告)日：2002-12-24

申请号：US09623406

申请日：2000-09-05

申请人： Dipakbin Q. Chowdhury ,  Kevin B. Sparks

发明人： Dipakbin Q. Chowdhury ,  Kevin B. Sparks

IPC分类号： G02B634

CPC分类号： G02F1/0134 ,  G02B6/02095 ,  G02B6/02104 ,  G02B6/02195 ,  G02F1/0115 ,  G02F1/365 ,  G02F2201/307

摘要： Disclosed is a tunable optical filter which may be used in telecommunications systems. The filter comprises a single mode optical waveguide containing a grating. The resonance wavelength of the filter is changed by changing the boundary condition at the interface between the cladding layer and an additional layer applied to the outer cladding layer surface. This boundary condition is changed by changing the refractive index of the additional layer. Means for changing the refractive index of the additional layer include establishing a structural resonance in the additional layer, or forming the additional layer from electro-optic or piezoelectric materials.

摘要翻译： 公开了可用于电信系统的可调谐滤光器。 滤波器包括包含光栅的单模光波导。 通过改变包覆层和施加到外包层表面的附加层之间的界面处的边界条件来改变滤光器的共振波长。 通过改变附加层的折射率来改变该边界条件。 用于改变附加层的折射率的手段包括在附加层中建立结构共振，或者从电光或压电材料形成附加层。

公开(公告)号：US06463684B2

公开(公告)日：2002-10-15

申请号：US09754914

申请日：2001-01-05

申请人： Ju-Nyung Jang

发明人： Ju-Nyung Jang

IPC分类号： G02B634

CPC分类号： G02B6/0219 ,  G02B6/02095 ,  G02B6/021 ,  G02B6/02209 ,  G02B6/03633 ,  G02B6/0365

摘要： A temperature-compensated, long-period grating using a multi-cladding structure having an optical fiber including a core with a plurality of long-period gratings formed periodically thereon, and the core is doped with a first dopant to exhibit a positive coupling wavelength shift as the temperature increases; an inner cladding surrounding the core with a refractive index lower than the core; and, an outer cladding surrounding the inner cladding with a lower refractive index than said inner cladding, and the outer cladding is doped with a second dopant to exhibit a negative coupling wavelength shift as the refractive index of the outer cladding is increased with temperature so that the positive wavelength shift and the negative wavelength shift are canceled out.

公开(公告)号：US06442313B2

公开(公告)日：2002-08-27

申请号：US09777085

申请日：2001-02-05

申请人： Ryozo Yamauchi ,  Akira Wada ,  Tetsuya Sakai ,  Nobuyuki Tanaka ,  Kensuke Shima ,  Kenji Nishide ,  Shigefumi Yamasaki

发明人： Ryozo Yamauchi ,  Akira Wada ,  Tetsuya Sakai ,  Nobuyuki Tanaka ,  Kensuke Shima ,  Kenji Nishide ,  Shigefumi Yamasaki

IPC分类号： G02B634

CPC分类号： G02B6/02147 ,  G02B6/02095

摘要： An optical fiber grating is manufactured by heating intermittently an optical fiber, provided with a core having residual stress in the longitudinal direction, softening a peripheral cladding of the core, and forming spatial periodical changes for the relative refractive index-difference between the core and the cladding, in the longitudinal direction of the aforementioned optical fiber by having the index of refraction of the core change, through the releasing of the aforementioned residual stress. As a result, an optical fiber grating and the manufacturing method thereof, which do not require expensive equipment and which exhibit high productivity, and furthermore a grating characteristic which is stable over time can be provided.

摘要翻译： 光纤光栅通过间歇地加热设置有在纵向上具有残余应力的芯的光纤，软化芯的外围包层，并且形成芯与芯的相对折射率差的空间周期性变化 通过释放上述残余应力，通过使芯的折射率变化，在上述光纤的长度方向上包覆。 结果，可以提供不需要昂贵的设备并且表现出高生产率的光纤光栅及其制造方法，此外还可以提供一种随时间稳定的光栅特性。

公开(公告)号：US20020051606A1

公开(公告)日：2002-05-02

申请号：US09983392

申请日：2001-10-24

申请人： Sumitomo Electric Industries, Ltd.

发明人： Michiko Takushima ,  Shinji Ishikawa ,  Masakazu Shigehara

IPC分类号： G02B006/34 ,  G02B006/26

CPC分类号： G02B6/0208 ,  G02B6/02095

摘要： The optical loss filter according to the present invention is configured such that a first long-period grating and a second long-period grating are formed in cascade on a unitary optical fiber having a core region and a cladding region. A coating layer surrounding a part of the cladding region is provided between the first and second long-period gratings. The optical loss filter can be made smaller, and can easily realize a desirable loss characteristic.

摘要翻译： 根据本发明的光损耗滤波器被配置为使得第一长周期光栅和第二长周期光栅级联地形成在具有芯区域和包层区域的单一光纤上。 围绕包层区域的一部分的涂层设置在第一和第二长周期光栅之间。 可以使光损耗滤波器更小，并且可以容易地实现期望的损耗特性。

公开(公告)号：US06360038B1

公开(公告)日：2002-03-19

申请号：US09310295

申请日：1999-05-12

申请人： Victor Grubsky

发明人： Victor Grubsky

IPC分类号： G02B626

CPC分类号： G02B6/29334 ,  G02B6/02095 ,  G02B6/021

摘要： A wavelength-selective optical device for coupling of light at predetermined wavelength from one optical fiber waveguide to another using at least two gratings and cladding-mode assisted coupling is disclosed. The transfer of light is performed using intermediate coupling to one or more cladding mode of the waveguides. In the case when the fibers have physically different claddings, an arrangement for transfer of light from one cladding to another is required. The disclosed coupler has no back-reflection, small insertion loss, and very high channel isolation. The device can be used in wavelength-division multiplexing networks.

摘要翻译： 公开了一种用于将预定波长的光从一个光纤波导耦合到另一个使用至少两个光栅和包层模辅助耦合的波长选择光学装置。 使用与波导的一个或多个包层模式的中间耦合来执行光的传输。 在纤维具有物理上不同的包层的情况下，需要用于将光从一个包层转移到另一个包层的布置。 所公开的耦合器没有背反射，小的插入损耗和非常高的沟道隔离。 该设备可用于波分复用网络。

公开(公告)号：US06343168B1

公开(公告)日：2002-01-29

申请号：US09476656

申请日：1999-12-31

申请人： Kent A. Murphy ,  Mark E. Jones

发明人： Kent A. Murphy ,  Mark E. Jones

IPC分类号： G02B634

CPC分类号： G01D5/35377 ,  G01D5/35345 ,  G02B6/02095 ,  G02B6/02104 ,  G02B6/14

摘要： An optical sensor arrangement is provided. The arrangement comprises a light source coupled to an optical waveguide. The optical waveguide has at least one long period grating that promotes an excitation of confined propagating light into higher order modes causing an excitation of a sensing mechanism. A detector is coupled to the optical waveguide to detect a resulting optical signal.

摘要翻译： 提供光学传感器装置。 该装置包括耦合到光波导的光源。 光波导具有至少一个长周期光栅，其促进受限传播的光激发到高阶模式，从而引起感测机构的激发。 检测器耦合到光波导以检测所得到的光信号。

公开(公告)号：US20020003926A1

公开(公告)日：2002-01-10

申请号：US09903763

申请日：2001-07-13

申请人： Sumitomo Electric Industries, Ltd.

发明人： Tadashi Enomoto ,  Shinji Ishikawa ,  Masakazu Shigehara ,  Michiko Takushima

IPC分类号： G02B006/34

CPC分类号： G02B6/02095 ,  G02B6/03633 ,  G02B6/03666 ,  G02B6/14 ,  G02B6/266

摘要： The present invention relates to an optical fiber grating element having structure enabling more precise design and fabrication, a production method thereof, and an optical fiber filter including the same. The optical fiber grating element according to the present invention comprises a multi-mode optical fiber having a first core region of a refractive index n1, a second core of a refractive index n2 provided on a periphery of the first core region, and a cladding region of a refractive index n3 provided on a periphery of the second core region, and having a cutoff wavelength regarding to LP02-mode light on the longer wavelength side than a wavelength band in use. A long-period grating for selectively coupling the fundamental LP01-mode light of a predetermined wavelength in the wavelength band I use to LP0m (mnull2)-mode light is provided in a predetermined region of the first core region. Particularly, the optical fiber grating element according to the present invention satisfies the relationship of n1>Neff01>n2>Neff0m>n3, where Neff01 is an effective refractive index with respect to the fundamental LP01-mode light and Neff0m is an effective refractive index with respect to the LP0m (mnull2)-mode light.

摘要翻译： 本发明涉及具有能够进行更精确的设计和制造的结构的光纤光栅元件及其制造方法以及包括该光纤光栅的光纤滤波器。 根据本发明的光纤光栅元件包括具有折射率n1的第一纤芯区域和设置在第一纤芯区域周围的折射率n2的第二纤芯的多模光纤，以及包覆区域 设置在第二纤芯区域的周围的折射率n3，并且在比使用的波长带更长的波长侧具有关于LP02模式光的截止波长。 在第一核心区域的预定区域中提供用于将波长带I中使用的预定波长的基本LP01模式光选择性地耦合到LP0m（m> = 2）模式光的长周期光栅。 特别地，根据本发明的光纤光栅元件满足n1> Neff01> n2> Neff0m> n3的关系，其中Neff01是相对于基本LP01模式光的有效折射率，Neff0m是有效折射率， 对于LP0m（m> = 2）模式的光。