公开(公告)号：US20090103874A1

公开(公告)日：2009-04-23

申请号：US12293346

申请日：2007-03-19

申请人： Jes Broeng ,  Anders Petersson ,  Kim Per Hansen ,  Peter M.W. Skovgaard ,  Martin Dybendal Nielsen ,  Thomas Nikolajsen

发明人： Jes Broeng ,  Anders Petersson ,  Kim Per Hansen ,  Peter M.W. Skovgaard ,  Martin Dybendal Nielsen ,  Thomas Nikolajsen

IPC分类号： G02B6/036

CPC分类号： H01S3/06754 ,  G02B6/021 ,  G02B6/02119 ,  G02B6/02366 ,  G02B6/03633 ,  G02B6/03694 ,  H01S3/0407 ,  H01S3/06729 ,  H01S3/06745 ,  H01S3/0675 ,  H01S3/09415

摘要： The invention relates to an optical fiber defining a longitudinal direction, the optical fiber comprising a core having a diameter larger than 10 μm, said core comprises at least two solid segments of different composition, at least one of the segments comprises a photo-sensitive material. The core may be segmented in its cross-sectional direction and/or in its longitudinal direction. The optical fiber may comprise a Bragg grating written in at least one of said solid core segmentsIn a preferred embodiment the optical fiber comprises a core with an effective refractive index ncore, and a cladding surrounding said core, wherein in a cross-section perpendicular to said longitudinal direction, said core being segmented, said core comprising a first core segment with an area a1 and a second core segment with an area a2; said first core segment comprises at least one photo-sensitive material, such as Ge and/or B and/or P doped silica; said second core segment surrounds said first core segment.

摘要翻译： 本发明涉及一种限定纵向方向的光纤，该光纤包括直径大于10um的芯，所述芯包括至少两个不同成分的固体部分，至少一个部分包括光敏材料 。 芯可以在其横截面方向和/或其纵向方向上分段。 光纤可以包括写在至少一个所述实心芯段中的布拉格光栅。在优选实施例中，光纤包括具有有效折射率ncore的芯和围绕所述芯的包层，其中垂直于 所述芯部被分割，所述芯部包括具有区域a1的第一芯部段和具有区域a2的第二芯部段; 所述第一核心部分包含至少一种感光材料，例如Ge和/或B和/或P掺杂二氧化硅; 所述第二核心段围绕所述第一核心段。

公开(公告)号：US07024075B2

公开(公告)日：2006-04-04

申请号：US10220065

申请日：2001-03-01

申请人： Isabelle Riant ,  Carlos De Barros ,  Michel Jurczyszyn ,  Pierre Sansonetti

发明人： Isabelle Riant ,  Carlos De Barros ,  Michel Jurczyszyn ,  Pierre Sansonetti

IPC分类号： G02B6/34

CPC分类号： G02B6/02119 ,  G02B6/02085

摘要： The invention relates to an optical fiber presenting a core, cladding, and a grating written by irradiation and coupling at least one light mode into the cladding so that it is dissipated therein. The invention proposes causing the mean index to vary progressively along the grating, at least at the ends of the grating. The progressive variation in mean index or in the amplitude of index modulation for writing the grating serves to limit insertion losses to the filter formed by the grating. Analogously, in a written-in grating, the invention provides the equivalent of progressively varying the core size of the fiber for interconnecting two optical fibers presenting different core diameters. The invention is applicable in particular to gain-equalizing filters in WDM transmission systems.

公开(公告)号：US06931185B2

公开(公告)日：2005-08-16

申请号：US10341135

申请日：2003-01-13

申请人： Masaaki Sudo ,  Atuhiko Niwa ,  Satoshi Okude

发明人： Masaaki Sudo ,  Atuhiko Niwa ,  Satoshi Okude

IPC分类号： G02B6/02 ,  G02B6/34 ,  G02F1/39 ,  G02B6/22

CPC分类号： C03C3/06 ,  C03C13/00 ,  G02B6/0208 ,  G02B6/02119 ,  G02B6/0365 ,  G02B6/03694

摘要： Photosensitivity of an inner core which is disposed in a central portion of a core is low. Photosensitivity of an outer core which is disposed close to a cladding is high. In the cladding, photosensitivity of the inner cladding which is close to the core is high and photosensitivity of an outer cladding which is outside of the inner cladding is low. A plurality of slant optical fiber grating having different optical characteristics by using the optical fiber having such photosensitivity so as to form a gain equalizing optical filter. By doing this, it is possible to provide an optical filter having a slant optical fiber grating which can maintain a filtering characteristics in a narrow bandwidth and enlarge loss area.

摘要翻译： 设置在芯的中心部分的内芯的光敏性低。 靠近包层设置的外芯的感光度高。 在包层中，靠近芯的内包层的光敏性高，并且在内包层外侧的外包层的光敏性低。 通过使用具有这种光敏性的光纤来形成具有不同光学特性的多个倾斜光纤光栅，以形成增益均衡滤光器。 通过这样做，可以提供一种具有倾斜光纤光栅的滤光器，其能够在窄带宽内保持滤光特性并扩大损耗面积。

公开(公告)号：US20020118939A1

公开(公告)日：2002-08-29

申请号：US10082083

申请日：2002-02-26

申请人： Sumitomo Electric Industries, Ltd.

发明人： Toshiki Taru ,  Shinji Ishikawa ,  Akira Inoue

IPC分类号： G02B006/22 ,  G02B006/16 ,  G02B006/18

CPC分类号： G02B6/03694 ,  C03B37/01413 ,  C03B37/01466 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/18 ,  C03B2203/23 ,  G02B6/021 ,  G02B6/02119 ,  G02B6/03627

摘要： An optical fiber comprises a core region, an inner cladding region, and an outer cladding region. Each of the core region and inner cladding region is doped with GeO2, whereas the inner cladding region is also doped with F element. The core region has a refractive index higher than each of the refractive index of the inner cladding region and the refractive index of the outer cladding region. Each of the core region and inner cladding region doped with GeO2 has a UV photosensitivity. The deviation in concentration distribution of GeO2 added to the inner cladding region is so small that the deviation in UV photosensitivity in the inner cladding region is null10% or less.

摘要翻译： 光纤包括芯区域，内包层区域和外包层区域。 芯区域和内包层区域均掺杂有GeO 2，而内包层区域也掺杂有F元素。 芯区域的折射率高于内包层区域的折射率和外包层区域的折射率。 掺杂有GeO 2的芯区域和内包层区域都具有UV光敏性。 添加到内包层区域的GeO 2的浓度分布偏差如此小，使得内包层区域的紫外线光敏性的偏差为±10％以下。

公开(公告)号：US06321007B1

公开(公告)日：2001-11-20

申请号：US09448733

申请日：1999-11-24

申请人： Paul E. Sanders

发明人： Paul E. Sanders

IPC分类号： G02B634

CPC分类号： G02B6/02119 ,  G02B6/021 ,  G02B6/03627 ,  G02B6/03694

摘要： A single mode optical fiber, having a pure silica core and a cladding, and having a Bragg grating in along a length of some of the cladding, providing reflectivity in some of the cladding but not in the core, and a method for making same. Because the core is pure silica, it is unaffected by exposure to ultraviolet light, and so the process of imprinting a Bragg grating does not affect the refractive index of the core. The portion of the cladding in which the Bragg grating is to be imprinted is a glass containing an index-lowering dopant, such as fluorine, as well as a photosensitizing dopant, such as germanium. Exposure to ultraviolet light therefore forms a Bragg grating in a portion of the cladding, but not in the core, providing reflectivity in the cladding, but not in the core. A second portion of cladding can also be provided, surrounding the portion doped with the photosensitizing dopant. The second portion of cladding is an outer cladding, surrounding the doped portion, which abuts the core.

摘要翻译： 具有纯二氧化硅芯和包层的单模光纤，并且沿着一些包层的长度具有布拉格光栅，在一些包层中提供反射率，而不在芯中提供反射率及其制造方法。 因为核心是纯二氧化硅，所以它不受紫外线的影响，因此印刷布拉格光栅的过程不影响芯的折射率。 需要印刷布拉格光栅的包层的部分是含有诸如氟的折射率降低掺杂剂的玻璃，以及诸如锗的光敏掺杂剂。 因此，紫外光的曝光在包层的一部分中形成布拉格光栅，但不在芯中，在包层中提供反射率，而不在芯中。 还可以提供包层的第二部分，围绕掺杂有光敏掺杂剂的部分。 包层的第二部分是外包层，其围绕与核心邻接的掺杂部分。

公开(公告)号：US5790726A

公开(公告)日：1998-08-04

申请号：US789779

申请日：1997-01-28

申请人： Masumi Ito ,  Maki Inai ,  Akira Inoue ,  Masakazu Shigehara

发明人： Masumi Ito ,  Maki Inai ,  Akira Inoue ,  Masakazu Shigehara

IPC分类号： G02B6/124 ,  G02B6/34

CPC分类号： G02B6/124 ,  G02B6/02119 ,  G02B6/02133 ,  G02B6/02138 ,  G02B6/021

摘要： This invention provides an optical waveguide having diffraction gratings with sufficiently high reflectivity, a waveguide member for obtaining the optical waveguide, and a production process thereof. An optical waveguide in which desired diffraction gratings are formed in a core and in a cladding at a predetermined portion by using a waveguide member in which germanium dioxide is added in the core and in the cladding and irradiating the predetermined portion of the waveguide member with interference fringes of ultraviolet light. By this, the optical waveguide according to the present invention reflects guided light throughout the entire mode field region, thus having a high reflectivity.

摘要翻译： 本发明提供一种具有足够高反射率的衍射光栅的光波导，用于获得光波导的波导部件及其制造方法。 一种光波导，其中通过使用其中在核心和包层中添加二氧化锗的波导部件在预定部分在芯部和包层中形成期望的衍射光栅，并且在干涉下照射波导部件的预定部分 紫外线条纹。 由此，根据本发明的光波导在整个模场区域反射引导光，因此具有高的反射率。

公开(公告)号：US07203399B2

公开(公告)日：2007-04-10

申请号：US10747085

申请日：2003-12-30

申请人： Shinji Ishikawa ,  Toshiki Taru ,  Masakazu Shigehara ,  Masaki Ohmura

发明人： Shinji Ishikawa ,  Toshiki Taru ,  Masakazu Shigehara ,  Masaki Ohmura

IPC分类号： G02B6/00

CPC分类号： G02B6/03694 ,  G02B6/02085 ,  G02B6/02119 ,  G02B6/03611

摘要： The present invention relates to an optical fiber having a structure which allows further improvements to be made both in terms of lower reflectance and narrower bandwidth, and to a fiber grating type filter including the optical fiber. The optical fiber applied to the fiber grating type filter comprises a core region extending along a predetermined axis, and a cladding region provided on an outer periphery of the core region. The core region does not contain any photosensitive dopant which contributes to predetermined wavelength light photosensitivity as a glass property, but a part of the cladding region contain such a photosensitive dopant. By means of this composition, it is possible to form a grating, which has a grating plane slanted by a predetermined angle with respect to the optical axis, in a part of the cladding region surrounding the core region.

摘要翻译： 本发明涉及具有能够进一步改善低反射率和较窄带宽的结构的光纤以及包括该光纤的光纤光栅型滤光器。 施加到光纤光栅型滤光器的光纤包括沿着预定轴线延伸的芯区域和设置在芯区域的外周上的包层区域。 核心区域不含任何有助于作为玻璃性能的预定波长光敏性的光敏掺杂剂，但是包层区域的一部分含有这种光敏掺杂剂。 通过这种组合，可以形成光栅，该光栅具有相对于光轴倾斜预定角度的光栅平面，该光栅平面围绕着核心区域的一部分包层区域。

公开(公告)号：US20050141833A1

公开(公告)日：2005-06-30

申请号：US11000006

申请日：2004-12-01

申请人： Carlos Barros ,  Lionel Provost ,  Helene Biscaras ,  Christine Moreau

发明人： Carlos Barros ,  Lionel Provost ,  Helene Biscaras ,  Christine Moreau

IPC分类号： G02B6/122 ,  G02B6/02

CPC分类号： G02B6/02119

摘要： An optical waveguide suitable for a slanted Bragg grating (SBG) to be written thereinto has a refractive index profile defining a core and a cladding and a specific photosensitivity profile. This photosensitivity profile W(r) is such that, for a given SBG writing angle θ, the coupling of the fundamental mode into itself as counterpropagation in the waveguide, K(θ), is substantially zero and such that its derivative K′(θ) with respect to the angle θ is also substantially equal to zero. The zero derivative, and also the zero coupling of the fundamental mode as a function of the angle, means that a widened reflection pocket about the grating write angle is guaranteed.

摘要翻译： 要写入其中的适用于倾斜布拉格光栅（SBG）的光波导具有限定芯和包层的折射率分布和特定光敏度分布。 该光敏度曲线W（r）使得对于给定的SBG写入角θ，将基本模式自身耦合作为波导中的反向分散K（θ），基本为零，并且使得其导数K'（θ ）相对于角度θ也基本上等于零。 作为角度的函数的零微分以及基模的零耦合意味着围绕光栅写入角的加宽的反射腔被保证。

公开(公告)号：US20030063857A1

公开(公告)日：2003-04-03

申请号：US10225812

申请日：2002-08-21

申请人： Fujikura Ltd.

发明人： Akira Sakamoto ,  Satoshi Okude ,  Sudo Masaaki

IPC分类号： G02B006/34 ,  G02B006/16

CPC分类号： G02B6/02119 ,  G02B6/02085

摘要： A fiber type optical component in which nonuniform increase of refractive index is restricted to a minimum in an optical fiber to which light sensitive material is added to the cladding section and the cladding section of the optical fiber, by forming the optical fiber such that the outermost diameter of the light sensitive layer of the optical fiber is twice as large as the mode field diameter or more, or more preferably 2.5 times as large as the mode field diameter, and by forming slant type optical fiber grating by this optical fiber, it is possible to realize the fiber type optical component in which the bandwidth of transmittance loss is narrow and steep in the reflection restricting angle with filtering ability having large transmittance loss.

摘要翻译： 通过将光纤形成为最外侧的光纤，将光敏材料添加到光纤的包层部和包层部的光纤中将折射率的不均匀增加限制在最小的纤维型光学部件 光纤的感光层的直径为模场直径的2倍以上，更优选为模场直径的2.5倍，通过该光纤形成倾斜型光纤光栅，为 可以实现具有大的透射损失的滤光能力的反射限制角度下的透射率损失的带宽窄且陡峭的光纤型光学部件。

公开(公告)号：US20020186944A1

公开(公告)日：2002-12-12

申请号：US10140201

申请日：2002-05-08

申请人： ALCATEL

发明人： Isabelle Riant ,  Carlos De Barros

IPC分类号： G02B006/22 ,  G02B006/16 ,  G02B006/34 ,  G02B006/26

CPC分类号： G02B6/02119 ,  G02B6/02085 ,  G02B6/021 ,  G02B6/03627 ,  G02B6/03694

摘要： The invention is related to an optical waveguide device comprising a length of fiber including a monomode core having a refraction index of nco, a photosensitivity of Sco and a radius Rco and an internal cladding with an refractive index of ncl, a photosensitivity of Scl and a radius of Rcl, and a outer cladding surrounding the internal cladding with an refractive index that allows the existence of multiple cladding modes, and a slanted Bragg grating with an effective tilt angle of null written in core and inner cladding of the optical waveguide, coupling the fundamental mode into several cladding modes p1 where Rconull2.5 Rco and the SconullScl

摘要翻译： 本发明涉及一种光波导器件，该光波导器件包括具有折射率nco，Sco的光敏度和半径Rco的折射率nco，折射率为ncl的内部包层，Sc1的光敏度和 Rcl的半径，以及包围内部包层的外部包层，其折射率允许存在多个包层模式;以及斜面布拉格光栅，其具有写入光波导的芯和内包层中的θ的有效倾斜角，将 基本模式转化成若干包层模式p1，其中Rco <= 2.5Rco和Sco <= Scl