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1. 发明授权

US06810195B2 Securing optical elements and optical devices 失效
公开(公告)号：US06810195B2
公开(公告)日：2004-10-26
申请号：US10328131
申请日：2002-12-19
申请人： Venkata A. Bhagavatula , Sean M. Garner , James S. Sutherland
发明人： Venkata A. Bhagavatula , Sean M. Garner , James S. Sutherland
IPC分类号： G02B600
CPC分类号： G02B6/3636 , G02B6/364 , G02B6/3652
摘要： Articles and methods for securing or aligning objects on substrates are disclosed. The articles and methods include a gripping element disposed on a substrate that includes a groove and flexible gripping elements. The articles and methods are particularly useful for securing optical fibers in arrays and manufacturing optical devices.

2. 发明授权

US06259830B1 Poled electro-optic device and method 失效
标题翻译：极化电光装置及方法
公开(公告)号：US06259830B1
公开(公告)日：2001-07-10
申请号：US09451624
申请日：1999-11-30
申请人： Venkata A. Bhagavatula
发明人： Venkata A. Bhagavatula
IPC分类号： G02F1035
CPC分类号： G02F1/3558 , C03B37/026 , G02B6/02052 , G02B6/02133 , G02B6/105 , G02F1/383
摘要： A resultant device and a method for making a frame structure for use as a poled optical device (10) includes providing a glass preform (30) having a poling area (12) and a waveguiding core area (16). At least one feedstock (24) is assembled into the waveguiding core area (16). The at least one feedstock (24) is separated from the poling area (12). The glass preform (30) and the at least one feedstock (24) are heated (36) and drawn into a smaller diameter (13) to form an optical waveguide.
摘要翻译：一种用于制造用作极化光学器件（10）的框架结构的结果器件和方法包括提供具有极化区域（12）和波导核心区域（16）的玻璃预制件（30）。至少一个原料（24）组装到波导芯区域（16）中。至少一种原料（24）与极化区域（12）分离。玻璃预制件（30）和至少一个原料（24）被加热（36）并被拉伸成更小的直径（13）以形成光波导。

3. 发明授权

US5894537A Dispersion managed optical waveguide 失效
标题翻译：色散管理光波导
公开(公告)号：US5894537A
公开(公告)日：1999-04-13
申请号：US584868
申请日：1996-01-11
申请人： George E. Berkey , Venkata A. Bhagavatula , Peter C. Jones , Donald B. Keck , Yanming Liu , Robert A. Modavis , Alan J. Morrow , Mark A. Newhouse , Daniel A. Nolan
发明人： George E. Berkey , Venkata A. Bhagavatula , Peter C. Jones , Donald B. Keck , Yanming Liu , Robert A. Modavis , Alan J. Morrow , Mark A. Newhouse , Daniel A. Nolan
IPC分类号： C03B37/012 , C03B37/014 , C03B37/027 , G02B6/10
CPC分类号： G02B6/02247 , C03B37/01211 , C03B37/01228 , C03B37/0124 , C03B37/01248 , C03B37/01257 , C03B37/01413 , C03B37/01466 , C03B37/0148 , C03B37/01493 , C03B37/027 , G02B6/03611 , G02B6/03644 , C03B2203/18 , C03B2203/20 , C03B2203/22 , C03B2203/24 , C03B2203/36
摘要： A single-mode optical waveguide fiber designed to limit power penalty due to four wave mixing and a method of making the waveguide is disclosed. Variations in properties, e.g., radius or refractive index, of the waveguide fiber core provide a total dispersion which varies along the length of the waveguide. The algebraic sum of products of length times total dispersion is controlled to a pre-selected value for each waveguide fiber which makes up a system link. Proper choice of total dispersion variation magnitude and sub-length results in a system link wherein a signal travels only short distances in waveguide portions having total dispersion near zero. However, the variation of the total dispersion provides a system link which has a pre-selected dispersive effect on the signal over a selected wavelength range. The dispersive effect on the signal can be chosen to be essentially zero. A number of techniques for fabricating DM fiber are also disclosed.
摘要翻译：公开了一种设计用于限制由于四波混频引起的功率损失的单模光纤光纤和制造波导的方法。波导纤维芯的性质，例如半径或折射率的变化提供沿波导长度变化的总色散。将长度乘以总色散的乘积的代数和控制为构成系统链路的每个波导光纤的预选值。总体色散变化幅度和子长度的适当选择导致系统链路，其中信号在具有接近零的总色散的波导部分中仅行进短距离。然而，总色散的变化提供了对所选波长范围上的信号具有预选色散效应的系统链路。对信号的色散效应可以选择为基本为零。还公开了用于制造DM纤维的许多技术。

4. 发明授权

US5841583A Multi-path interference filter 失效
标题翻译：多路径干扰滤波器
公开(公告)号：US5841583A
公开(公告)日：1998-11-24
申请号：US784020
申请日：1997-01-15
申请人： Venkata A. Bhagavatula
发明人： Venkata A. Bhagavatula
IPC分类号： G02B5/28 , G02B6/00 , G02B6/26 , G02B6/293 , G02B6/34
CPC分类号： G02B5/285 , G02B6/29346 , G02B6/29358 , G02B6/2937
摘要： An interference filter (10, 30, 50, 70, 90, 110, 130, 150, or 190) filters selected wavelengths by dividing an input beam into two or more intermediate beams having different optical path lengths and by recombining the intermediate beams into an output beam that is modified by interference between the intermediate beams. An optical path length difference generator (20, 40, 60, 80, 100, 120, 140, 160, or 200) varies the optical path lengths of the intermediate beams by changing the physical lengths of their paths or the refractive indices of the mediums in which they are conveyed. The optical path length generator (20) of one exemplary embodiment (10) includes a spacer plate (20) that is divided into elements (22 and 24) having different refractive indices for varying the optical path lengths of the intermediate beams. Another optical path length difference generator (140) is formed by a stack of partially reflective surfaces (144) that are spaced apart in the direction of beam propagation by at least one nominal wavelength for varying the physical path lengths between the intermediate beams.
摘要翻译：通过将输入光束划分成具有不同光程长度的两个或更多个中间光束并通过将中间光束重新组合成一个干涉滤光器（10,30,50,70,90,110,130,150或190）来滤除所选择的波长输出光束通过中间光束之间的干涉进行修改。光路长度差产生器（20,40,60,80,100,120,140,160或200）通过改变其路径的物理长度或介质的折射率来改变中间光束的光路长度在那里他们被传达。一个示例性实施例（10）的光路长度发生器（20）包括间隔板（20），其被分成具有不同折射率的元件（22和24），用于改变中间光束的光路长度。另一光路长度差产生器（140）由一组部分反射表面（144）形成，该堆叠部分反射表面在束传播方向上间隔开至少一个标称波长，用于改变中间光束之间的物理路径长度。

5. 发明授权

US5649044A Dispersion shifted optical waveguide 失效
标题翻译：色散位移光波导
公开(公告)号：US5649044A
公开(公告)日：1997-07-15
申请号：US562231
申请日：1995-11-21
申请人： Venkata A. Bhagavatula
发明人： Venkata A. Bhagavatula
IPC分类号： G02B6/028 , C03B37/075 , G02B6/036 , G02B6/18
CPC分类号： G02B6/02014 , G02B6/02238 , G02B6/0283 , G02B6/0286 , G02B6/03627 , G02B6/03644 , G02B6/03611
摘要： A novel optical waveguide fiber having low total dispersion slope, relatively large mode field diameter, larger effective area, and a relatively simple core profile design is disclosed. The core refractive index profile comprises three segments. The adjustability of the height, width and location of the three core index profile segments, provides sufficient flexibility to meet a specification which calls for a dispersion shifted waveguide fiber capable of limiting four photon mixing or self phase modulation. The novel waveguide is characterized by a mode field diameter .gtoreq.7.5 microns and a total dispersion slope .ltoreq.0.070 ps/nm.sup.2 -km.
摘要翻译：公开了一种具有低总色散斜率，相对较大的模场直径，较大有效面积和相对简单的芯轮廓设计的新型光波导光纤。芯折射率分布包括三个部分。三芯索引曲线段的高度，宽度和位置的可调性提供了足够的灵活性，以满足要求限制四个光子混合或自相位调制的色散位移波导光纤的规范。新型波导的特征在于模场直径> / = 7.5微米，总色散斜率<0.070ps / nm 2-km。

6. 发明授权

US4889404A Asymmetrical bidirectional telecommunication system 失效
标题翻译：不对称双向电信系统
公开(公告)号：US4889404A
公开(公告)日：1989-12-26
申请号：US259723
申请日：1988-10-19
申请人： Venkata A. Bhagavatula , David E. Charlton
发明人： Venkata A. Bhagavatula , David E. Charlton
IPC分类号： G02B6/36
CPC分类号： G02B6/03611 , G02B6/02214 , G02B6/03627 , G02B6/03633 , G02B6/03644 , G02B6/0365 , G02B6/03666 , G02B6/02047 , G02B6/0281 , G02B6/0286
摘要： The present invention pertains to an asymmetrical bidirectional optical communication system of the type comprising a central station, a plurality of user stations, and a plurality of bidirectional optical transmission paths, one of which connects the central station and one of the user stations. The central station is provided with a laser for initiating in the optical transmission path the propagation at a wavelength in the 1100-1700 nm window of a single-mode signal. Each user station is provided with a light source which initiates in the optical transmission path the propagation at a wavelength in the 700-950 nm window of a few-mode signal. Each optical transmission path comprises an optical fiber having transmission characteristics such that the single-mode signal propagates with a total dispersion less than 5 ps/km-nm and the few mode signal propagates with a bandwidth greater than 1 GHz-km.
摘要翻译：本发明涉及一种不对称双向光通信系统，其类型包括中心站，多个用户站和多个双向光传输路径，其中一个连接中心站和一个用户站。中心站设置有用于在光传输路径中启动在单模信号的1100-1700nm窗口中的波长的传播的激光器。每个用户站设置有光源，其在光传输路径中启动在几模式信号的700-950nm窗口中的波长处的传播。每个光传输路径包括具有传输特性的光纤，使得单模信号以小于5ps / km-nm的总色散传播，并且少数模式信号以大于1GHz-km的带宽传播。

7. 发明授权

US4494969A Method of forming laminated single polarization fiber 失效
标题翻译：层压单极化纤维的形成方法
公开(公告)号：US4494969A
公开(公告)日：1985-01-22
申请号：US538326
申请日：1983-10-03
申请人： Venkata A. Bhagavatula
发明人： Venkata A. Bhagavatula
IPC分类号： G02B6/00 , C03B19/14 , C03B37/014 , C03B37/018 , G02B6/024 , C03B37/075 , G02B5/172
CPC分类号： C03B37/01493 , C03B37/01473 , C03B2203/12 , C03B2203/22 , C03B2203/30
摘要： A process for manufacturing a preform from which is drawn an optical fiber, the core of which comprises layers of different glass composition. Layers of glass soot are deposited on the flat, longitudinally extending sides of a thin, elongated mandrel. Adjacent soot coatings have different refractive indices. A preliminary coating of cladding glass soot is deposited on the laminated soot structure. The resultant composite body is consolidated and stretched to form a rod or core structure upon which the final coating of cladding soot is deposited. The resultant composite body is consolidated and drawn into an optical fiber. In a modification of the this method, the mandrel is removed after the planar soot coatings and preliminary coating of cladding soot are deposited thereon. The resultant soot body is consolidated and processed as described previously.
摘要翻译：一种用于制造预成型件的方法，其中拉出了一种光纤，其芯部包括不同玻璃组成的层。玻璃烟灰层沉积在细长的心轴的平坦的纵向延伸的侧面上。相邻的烟灰涂层具有不同的折射率。包层玻璃烟灰的初步涂层沉积在层压烟灰结构上。所得复合体被固结和拉伸以形成棒或芯结构，在其上沉积包覆烟灰的最终涂层。将所得的复合体固结并拉入光纤。在该方法的修改中，在平面烟灰涂层和包覆烟灰的初步涂覆沉积在其上之后，去除心轴。如前所述，将所得烟灰体固结和加工。

8. 发明授权

US06963682B2 Beam altering fiber lens device and method of manufacture 失效
标题翻译：光束改变光纤透镜装置及其制造方法
公开(公告)号：US06963682B2
公开(公告)日：2005-11-08
申请号：US10202562
申请日：2002-07-23
申请人： Venkata A. Bhagavatula , Nagaraja Shashidhar , John Himmelreich
发明人： Venkata A. Bhagavatula , Nagaraja Shashidhar , John Himmelreich
IPC分类号： G02B6/02 , G02B6/255 , G02B6/26 , G02B6/30 , G02B6/32 , G02B6/42
CPC分类号： G02B6/262 , G02B6/2552 , G02B6/30 , G02B6/32 , G02B6/4202 , G02B6/4203 , G02B6/4206 , G02B6/4214
摘要： A multi-lens apparatus for altering the mode field of an optical signal is disclosed. The apparatus includes an optical fiber having a core region defining an optical axis and a GRIN-fiber lens positioned in relation to one end of the optical fiber. A biconic lens including an external surface defined by two different curves disposed substantially orthogonal to one another, a major curve C1 and a minor curve C2, with C1 and C2 intersecting at or near the optical axis is positioned in relation to an end of the GRIN-fiber lens remote from the fiber. A method of manufacturing a multi-lens apparatus for altering the mode field of an optical signal, and an optical assembly are also disclosed.
摘要翻译：公开了一种用于改变光信号的模场的多透镜装置。该装置包括具有限定光轴的芯区域和相对于光纤的一端定位的GRIN光纤透镜的光纤。双凸透镜，其包括由基本上彼此正交布置的两个不同曲线限定的外表面，主曲线C 1和次曲线C 2 2，其中C < 在光轴处或其附近相交的1＆lt; 2＆gt; 2＆gt; 2＆gt;相对于远离光纤的GRIN光纤透镜的端部定位。还公开了一种制造用于改变光信号的模场的多透镜装置的方法和光学组件。

9. 发明授权

US06556756B2 Dispersion shifted optical waveguide fiber 有权
标题翻译：色散位移光波导光纤
公开(公告)号：US06556756B2
公开(公告)日：2003-04-29
申请号：US10050658
申请日：2002-01-16
申请人： Venkata A. Bhagavatula
发明人： Venkata A. Bhagavatula
IPC分类号： G02B602
CPC分类号： G02B6/02271 , G02B6/02285 , G02B6/03611 , G02B6/03644 , G02B6/03666 , G02B6/03688
摘要： A single mode optical waveguide fiber designed for high data rate, or WDM systems or systems incorporating optical amplifiers. The optical waveguide has a compound core having a central region and at least one annular region surrounding the central region. A distinguishing feature of the waveguide core is that the minimum refractive index of the central core region is less than the minimum index of the adjacent annular region. A relatively simple profile design has the characteristics of ease in manufacturing together with flexibility in tailoring Dw to yield a preselected zero dispersion wavelength, dispersion magnitude over a target wavelength range, and dispersion slope. The simplicity of profile gives reduced polarization mode dispersion.
摘要翻译：专为高数据速率设计的单模光纤光纤，或WDM系统或并入光放大器的系统。光波导具有复合芯，其具有中心区域和围绕中心区域的至少一个环形区域。波导芯的一个显着特点是中心芯区域的最小折射率小于相邻环形区域的最小折射率。相对简单的轮廓设计具有易于制造的特性以及裁剪Dw的灵活性，以产生预选的零色散波长，目标波长范围上的色散幅度和色散斜率。轮廓的简单性降低了偏振模色散。

10. 发明授权

US06507438B2 Dynamic tuning of multi-path interference filter 失效
公开(公告)号：US06507438B2
公开(公告)日：2003-01-14
申请号：US09962397
申请日：2001-09-25
申请人： Venkata A. Bhagavatula
发明人： Venkata A. Bhagavatula
IPC分类号： G02B2700
CPC分类号： G02B5/285 , G02B5/284 , G02B6/264 , G02B6/2937
摘要： An interference filter (10, 30, 50, 70, 90, 110, 130, 150, or 190) filters selected wavelengths by dividing an input beam into two or more intermediate beams having different optical path lengths and by recombining the intermediate beams into an output beam that is modified by interference between the intermediate beams. An optical path length difference generator (20, 40, 60, 80, 100, 120, 140, 160, or 200) varies the optical path lengths of the intermediate beams by changing the physical lengths of their paths or the refractive indices of the mediums in which they are conveyed. The optical path length generator (20) of one exemplary embodiment (10) includes a spacer plate (20) that is divided into elements (22 and 24) having different refractive indices for varying the optical path lengths of the intermediate beams. Another optical path length difference generator (140) is formed by a stack of partially reflective surfaces (144) that are spaced apart in the direction of beam propagation by at least one nominal wavelength for varying the physical path lengths between the intermediate beams.

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