公开(公告)号：US20160341891A1

公开(公告)日：2016-11-24

申请号：US15111885

申请日：2015-01-16

Applicant: VRIJE UNIVERSITEIT BRUSSEL

Inventor： Sanne SULEJMANI ,  Thomas GEERNAERT ,  Francis BERGHMANS ,  Hugo THIENPONT

IPC: G02B6/02 ,  G01L1/24 ,  G01D5/353

CPC classification number: G02B6/02357 ,  G01D5/3538 ,  G01L1/242 ,  G02B6/02109 ,  G02B6/02338 ,  G02B6/02352 ,  G02B2006/12138

Abstract: A microstructured optical fibre comprises a doped core region embedded in a cladding layer, and a plurality of longitudinal tubes, wherein a radial cross-section of the optical fibre comprises a central hexagonal portion comprising a plurality of holes arranged according to a hexagonal grid surrounding a core section. Each hole corresponds to a respective tube, within a hexagonal boundary of the grid, and the plurality of holes comprises holes of first and second types arranged in a biaxial mirror-symmetric configuration. The holes of the first type are arranged in two side holey structures comprising distinct sub-grids of the hexagonal grid, defined by respective outer boundaries corresponding to portions of the hexagonal boundary of the grid and respective inner boundaries. Outer tangential lines to the respective inner boundaries cross each other at the opposed side of the core with respect to the side of the respective side holey structure.

Abstract translation: 微结构光纤包括嵌入包覆层中的掺杂芯区和多个纵向管，其中光纤的径向横截面包括中心六边形部分，其包括根据六边形网格布置的多个孔，围绕 核心部分。 每个孔对应于在栅格的六边形边界内的相应管，并且多个孔包括以双轴镜对称构造布置的第一和第二类型的孔。 第一类型的孔布置在包括六边形网格的不同子网格的两个侧孔结构中，由对应于网格的六边形边界的部分和相应的内边界的相应的外边界限定。 相对于相应的内部边界的外切向线相对于相应的侧孔结构的侧面在芯的相对侧彼此交叉。

公开(公告)号：US20160209295A1

公开(公告)日：2016-07-21

申请号：US14994257

申请日：2016-01-13

Applicant: Weatherford Technology Holdings, LLC

Inventor： Domino TAVERNER

IPC: G01M11/00 ,  G02B6/036 ,  G02B6/02

CPC classification number: G01M11/333 ,  G01D5/35303 ,  G01D5/35316 ,  G02B6/02109 ,  G02B6/02371 ,  G02B6/03694

Abstract: Certain aspects of the present disclosure generally relate to an optical reference element having a wavelength spectrum comprising a plurality of wavelength functions having wavelength peaks spaced over a range of wavelengths, wherein adjacent wavelength functions are due to two orthogonal birefringence axes in the optical reference element. Aspects of the present disclosure may eliminate the drift issues associated with residual polarization and polarization dependent loss (PDL) with respect to grating-based sensor and reference element measurements.

Abstract translation: 本发明的某些方面通常涉及具有波长谱的光学参考元件，该波长谱包括具有在波长范围上间隔开的波长峰值的多个波长函数，其中相邻波长函数是由于光学参考元件中的两个正交双折射轴。 本公开的方面可以消除与基于光栅的传感器和参考元件测量相关的与残余极化和偏振相关损耗（PDL）相关的漂移问题。

公开(公告)号：US07831114B2

公开(公告)日：2010-11-09

申请号：US12351843

申请日：2009-01-11

Applicant: Gregory M. Bubel ,  William R. Holland ,  David J. Kudelko ,  Yaowen Li ,  Paul S. Westbrook

Inventor： Gregory M. Bubel ,  William R. Holland ,  David J. Kudelko ,  Yaowen Li ,  Paul S. Westbrook

IPC: G02B6/00 ,  G02B6/34

CPC classification number: H04B10/2572 ,  G02B6/02109 ,  G02B6/02195 ,  G02B6/274 ,  G02B6/2932 ,  G02B6/29322 ,  G02B6/29394 ,  H04B10/2519

Abstract: In a method and system for providing dispersion compensation in an optical system, there is coupled into the optical system at least one pathway into which there is connected a tunable chirped fiber Bragg grating, each such grating providing a respective tunable amount of dispersion. At least one respective DGD element is connected into the respective pathway for each such grating. The set of all such respective DGD elements in a given pathway introduces a bias differential group delay DGD(bias) having an absolute value that, for at least one tuning value of the grating, is substantially equal to differential group delay introduced by the grating.

Abstract translation: 在用于在光学系统中提供色​​散补偿的方法和系统中，耦合到光学系统中的至少一个通路，其中连接有可调谐线性调频光纤布拉格光栅，每个这样的光栅提供相应的可调量的色散。 对于每个这样的光栅，至少一个相应的DGD元件连接到相应的通路中。 在给定路径中的所有这些相应的DGD元件的集合引入了具有绝对值的偏差差分群延迟DGD（偏置），对于光栅的至少一个调谐值，其基本上等于由光栅引入的差分群延迟。

公开(公告)号：US07262848B2

公开(公告)日：2007-08-28

申请号：US10969968

申请日：2004-10-22

Applicant: Jens Peupelmann ,  Egbert Krause ,  Adalbert Bandemer

Inventor： Jens Peupelmann ,  Egbert Krause ,  Adalbert Bandemer

IPC: G01J4/00

CPC classification number: G02B6/274 ,  G01J4/00 ,  G02B6/02109 ,  G02B6/276 ,  G02B6/2766 ,  G02B6/29317

Abstract: A fiber polarimeter has one or more oblique fiber Bragg gratings disposed one behind the other in a fiber. The fiber Bragg gratings couple out portions of a light wave input to the fiber depending on its polarization. For more than one fiber Bragg grating a wave plate is disposed in the fiber between consecutive fiber Bragg gratings. The portions of the light wave from the fiber Bragg grating(s) are detected to produce measurement data that is used to calculate four Stokes parameters for determining polarization, degree of polarization and/or power of the light wave.

Abstract translation: 光纤偏振计具有在光纤中一个在另一个之后设置的一个或多个倾斜光纤布拉格光栅。 纤维布拉格光栅根据其极化将耦合到输入到光纤的光波的部分。 对于多于一个的光纤布拉格光栅，在连续的光纤布拉格光栅之间的光纤中设置波片。 检测来自光纤布拉格光栅的光波的部分，以产生用于计算用于确定光波的偏振度，偏振度和/或光功率的四个斯托克斯参数的测量数据。

公开(公告)号：US20070104435A1

公开(公告)日：2007-05-10

申请号：US11646046

申请日：2006-12-27

Applicant: Siddharth Ramachandran

Inventor： Siddharth Ramachandran

IPC: G02B6/036 ,  G02B6/02 ,  G02B6/00 ,  G02B6/34 ,  G02B6/028

CPC classification number: G02B6/02071 ,  G02B6/02109 ,  G02B6/03644

Abstract: A microbend-induced fiber grating is formed from a section of optical fiber configured to exhibit “splitting” between the resonant wavelengths supported by the TE and TM components of the LP1m mode and the resonant wavelength supported by the odd/even HE2m components of the LP1m mode. Since only the TE and TM components are polarization dependent, by splitting and shifting the resonant wavelengths for these modes away from a system-desired wavelength(s) supported by the odd/even HE modes, a polarization insensitive microbend-induced fiber grating can be formed. A fiber core configuration including a central core region, trench and ring is formed to exhibit a large radial gradient in core refractive index profile, with a significantly steep transition between the ring index and the trench index, to provide the desired splitting between the (undesired, polarization sensitive) TE/TM modes and the HE mode.

公开(公告)号：US20070104433A1

公开(公告)日：2007-05-10

申请号：US11646016

申请日：2006-12-27

Applicant: Siddharth Ramachandran

Inventor： Siddharth Ramachandran

IPC: G02B6/02 ,  G02B6/028 ,  G02B6/00 ,  G02B6/036

CPC classification number: G02B6/02071 ,  G02B6/02109 ,  G02B6/03644

Abstract: A microbend-induced fiber grating is formed from a section of optical fiber configured to exhibit “splitting” between the resonant wavelengths supported by the TE and TM components of the LP1m mode and the resonant wavelength supported by the odd/even HE2m components of the LP1m mode. Since only the TE and TM components are polarization dependent, by splitting and shifting the resonant wavelengths for these modes away from a system-desired wavelength(s) supported by the odd/even HE modes, a polarization insensitive microbend-induced fiber grating can be formed. A fiber core configuration including a central core region, trench and ring is formed to exhibit a large radial gradient in core refractive index profile, with a significantly steep transition between the ring index and the trench index, to provide the desired splitting between the (undesired, polarization sensitive) TE/TM modes and the HE mode.

Abstract translation: 微弯引起的光纤光栅由一部分光纤形成，该部分被配置为在由LP＆lt; 1＆gt;模式的TE和TM分量支持的谐振波长之间显示“分裂”，并且由 LP＆lt; 1m＆gt;模式的奇数/偶数HE 2m分量。 由于只有TE和TM组件是偏振相关的，通过将这些模式的谐振波长分裂和移位远离由奇/偶HE模支持的系统期望的波长，偏振不敏感微弯激光光栅可以是 形成。 形成包括中心芯区域，沟槽和环的纤维芯构型以在纤芯折射率分布中表现出大的径向梯度，在环索引和沟槽指数之间具有显着陡峭的转变，从而在（不期望的） ，极化敏感）TE / TM模式和HE模式。

公开(公告)号：US07010195B2

公开(公告)日：2006-03-07

申请号：US10099212

申请日：2002-03-15

Applicant: Paul Westbrook

Inventor： Paul Westbrook

IPC: G02B6/34 ,  G02B6/27

CPC classification number: G02B6/4215 ,  G02B6/02109 ,  G02B6/02195 ,  G02B6/243 ,  G02B6/266 ,  G02B6/2726 ,  G02B6/2793 ,  G02B6/29317 ,  G02B6/4214

Abstract: A tunable polarization dependent loss element is formed of a fiber including a highly tilted optical grating. The grating is formed at an angle of approximately 45° so as to preferentially scatter one polarization state out of the fiber core while allowing the remaining, orthogonal polarization to propagate unimpeded. By twisting the ends of the fiber grating structure, the orientation of the grating with respect to the fiber optical axis will be changed, modifying the amount of optical signal existing in each polarization state. In one embodiment, both ends may be rotated in the same direction through the same angular displacement, resulting in merely rotating the principle states of polarization in the fiber. Alternatively, the ends of the grating may be rotated (twisted) in opposite directions so as to couple all of the light signal into a single polarization state, reducing the amount of polarization dependent loss to essentially zero. Therefore, by controlling the twist imparted to the grating, the amount of exhibited polarization dependent loss can also be controlled.

公开(公告)号：US20060029346A1

公开(公告)日：2006-02-09

申请号：US10914208

申请日：2004-08-09

Applicant: Siddharth Ramachandran

Inventor： Siddharth Ramachandran

IPC: G02B6/02 ,  G02B6/036 ,  G02B6/028

CPC classification number: G02B6/02071 ,  G02B6/02109 ,  G02B6/03644

Abstract: A microbend-induced fiber grating is formed from a section of optical fiber configured to exhibit “splitting” between the resonant wavelengths supported by the TE and TM components of the LP1m mode and the resonant wavelength supported by the odd/even HE2m components of the LP1m mode. Since only the TE and TM components are polarization dependent, by splitting and shifting the resonant wavelengths for these modes away from a system-desired wavelength(s) supported by the odd/even HE modes, a polarization insensitive microbend-induced fiber grating can be formed. A fiber core configuration including a central core region, trench and ring is formed to exhibit a large radial gradient in core refractive index profile, with a significantly steep transition between the ring index and the trench index, to provide the desired splitting between the (undesired, polarization sensitive) TE/TM modes and the HE mode.

Abstract translation: 微弯引起的光纤光栅由一部分光纤形成，该部分被配置为在由LP＆lt; 1＆gt;模式的TE和TM分量支持的谐振波长之间显示“分裂”，并且由 LP＆lt; 1m＆gt;模式的奇数/偶数HE 2m分量。 由于只有TE和TM组件是偏振相关的，通过将这些模式的谐振波长分裂和移位远离由奇/偶HE模支持的系统期望的波长，偏振不敏感微弯激光光栅可以是 形成。 形成包括中心芯区域，沟槽和环的纤维芯构型以在纤芯折射率分布中表现出大的径向梯度，在环索引和沟槽指数之间具有显着陡峭的转变，从而在（不期望的） ，极化敏感）TE / TM模式和HE模式。

公开(公告)号：US06915042B2

公开(公告)日：2005-07-05

申请号：US10217426

申请日：2002-08-14

Applicant: Hedi Labidi ,  Carlos De Barros ,  Isabelle Riant

Inventor： Hedi Labidi ,  Carlos De Barros ,  Isabelle Riant

IPC: G02B6/34

CPC classification number: G02B6/02109 ,  G02B6/0208 ,  G02B6/02133

Abstract: The present invention relates to the field of optical fiber telecommunications. More specifically, the subject of the invention is a slanted Bragg grating optical fiber and a process for manufacturing such a fiber. The slanted Bragg grating optical fiber of longitudinal axis Z has slanted Bragg gratings photowritten in said fiber and having refractive index modulations along said axis Z, inclined at a same writing angle with respect to a normal plane to said axis Z and defining planes called writing planes forming the same angle than the writing angle with said normal plane, each writing plane forming with others writing planes specific angles called angles of rotation about said axis Z.

Abstract translation: 本发明涉及光纤通信领域。 更具体地，本发明的主题是倾斜的布拉格光栅光纤和用于制造这种光纤的方法。 纵向轴线Z的倾斜布拉格光栅光纤具有在所述光纤中照相印刷并具有沿所述轴线Z的折射率调制的倾斜布拉格光栅，相对于所述轴线Z的法线平面以相同的书写角度倾斜，并且限定称为写入平面的平面 形成与所述普通平面的写入角度相同的角度，每个书写平面与其他书写平面形成称为围绕所述轴线Z的旋转角度的旋转角度。

公开(公告)号：US06865320B1

公开(公告)日：2005-03-08

申请号：US10373613

申请日：2003-02-25

Applicant: Paul Westbrook

Inventor： Paul Westbrook

IPC: G01J1/04 ,  G01J1/42 ,  G02B6/02 ,  G02B6/28 ,  G02B6/34

CPC classification number: G02B6/02109 ,  G01J1/0209 ,  G01J1/04 ,  G01J1/0407 ,  G01J1/0422 ,  G01J1/0425 ,  G01J1/4257 ,  G02B6/02085 ,  G02B6/2852 ,  G02B6/29323 ,  G02B6/4215

Abstract: A matched pair of tilted gratings may be formed in a section of optical fiber (or waveguide) and used as a “tap” to measure the power of an optical signal passing through the fiber. By using a pair of highly-tilted gratings (e.g., tilted at an angle of 45° with respect to the optical axis) and orienting the gratings to be orthogonal with respect to one another (i.e., azimuthal orthogonality around the fiber axis), a pair of orthogonally polarized beams will be out-coupled from the propagating signal. Since the pair of beams are orthogonal, their sum can be made insensitive to variations in polarization of the optical signal propagating along the fiber.

Abstract translation: 可以在光纤（或波导）的一部分中形成一对匹配的倾斜光栅，并将其用作“抽头”来测量通过光纤的光信号的功率。 通过使用一对高度倾斜的光栅（例如，相对于光轴以45°的角度倾斜）并且使光栅相对于彼此正交（即，围绕光纤轴的方位正交）定向， 一对正交偏振光束将从传播信号外耦合。 由于该对光束是正交的，它们的和可以对沿着光纤传播的光信号的偏振变化不敏感。