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42 条记录 (耗时 0.025 秒)

    Controlled dispersion optical fiber
    1.
    发明授权
    Controlled dispersion optical fiber 失效
    受控分散光纤

    公开(公告)号：US06760525B2

    公开(公告)日：2004-07-06

    申请号：US10224242

    申请日：2002-08-19

    申请人： George E. Berkey ,  Venkata A. Bhagavatula ,  Lutfur Rahman ,  Vaidyanathan Srikant

    发明人： George E. Berkey ,  Venkata A. Bhagavatula ,  Lutfur Rahman ,  Vaidyanathan Srikant

    IPC分类号： G02B600

    CPC分类号： G02B6/03677 ,  C03B37/01211 ,  C03B37/01413 ,  C03B37/01807 ,  C03B2203/18 ,  C03B2203/36 ,  G02B6/02009 ,  G02B6/02242 ,  G02B6/02247 ,  G02B6/02271 ,  G02B6/0228 ,  G02B6/03611 ,  G02B6/03644

    摘要： Disclosed is a dispersion controlled optical waveguide fiber, and telecommunication systems using such a waveguide fiber, in which the end to end total dispersion and total dispersion slope is controlled by varying the refractive index profile along the fiber length. The waveguide fiber includes length portions each of which is characterized by total dispersion having a magnitude and sign and total dispersion slope having a magnitude and sign. The magnitudes and signs of total dispersion and total dispersion slope of respective length portions are chosen to provide for the optical waveguide fiber a desired end to end total dispersion and total dispersion slope. An advantage is achieved in the present invention by designing the refractive index profiles of the length portions to have total dispersion and total dispersion slope of opposite sign.

    摘要翻译： 公开了一种色散控制光波导光纤和使用这种波导光纤的电信系统，其中通过沿光纤长度改变折射率分布来控制端到端的总色散和总色散斜率。 波导纤维包括长度部分，每个部分的特征在于具有幅度和符号的总色散以及具有幅度和符号的总色散斜率。 选择各个长度部分的总色散和总色散斜率的大小和符号，以使光波导光纤具有期望的端到端总色散和总色散斜率。 通过设计长度部分的折射率分布以具有相反符号的总色散和总色散斜率，在本发明中实现了一个优点。

    Method of making dispersion managed optical fibers
    2.
    发明授权
    Method of making dispersion managed optical fibers 失效
    制造光纤的方法

    公开(公告)号：US06173588B1

    公开(公告)日：2001-01-16

    申请号：US09300894

    申请日：1999-04-28

    申请人： George E. Berkey ,  Venkata A. Bhagavatula

    发明人： George E. Berkey ,  Venkata A. Bhagavatula

    IPC分类号： C03B37027

    CPC分类号： G02B6/02247 ,  C03B37/01211 ,  C03B37/01234 ,  C03B37/0124 ,  C03B37/01248 ,  C03B37/01413 ,  C03B37/01466 ,  C03B37/0148 ,  C03B37/01493 ,  C03B37/027 ,  C03B2203/18 ,  C03B2203/20 ,  C03B2203/22 ,  C03B2203/24 ,  C03B2203/36 ,  G02B6/0281 ,  G02B6/03627 ,  G02B6/03633 ,  G02B6/03644 ,  G02B6/03661 ,  G02B6/03688

    摘要： An optical fiber having optical characteristics that vary along its length is made by assembling a plurality of cylindrical glass or soot tablets into or along a glass tablet alignment device, then fused into monolithic assembly. If desired, additional glass may be applied to the assembly before or after the fusing step. A vacuum is preferably applied during the fusing step. Each tablet preferably contains a core region, and it optionally contains a layer of cladding glass. Adjacent tablets are capable of forming optical fiber sections having different optical properties. Prior to consolidating the glass particles, chlorine preferably flows through or around the tablets and alignment device. The resultant draw blank can be drawn into a low loss optical fiber having short transition regions between adjacent areas of fiber. This method is particularly useful for making dispersion managed single-mode optical fibers.

    摘要翻译： 具有沿其长度变化的光学特性的光纤通过将多个圆柱形玻璃或烟灰片组装到玻璃片对齐装置中或沿着玻璃片对齐装置而制成，然后熔合成单片组件。 如果需要，可以在熔融步骤之前或之后向组件施加另外的玻璃。 在定影步骤期间优选施加真空。 每个片剂优选地包含核心区域，并且其任选地包含一层包层玻璃。 相邻的片剂能够形成具有不同光学性质的光纤部分。 在固化玻璃颗粒之前，氯优选流过片剂和对准装置中或周围。 所得到的拉伸坯料可以被拉入具有纤维相邻区域之间的短过渡区域的低损耗光纤。 该方法对于制造分散管理单模光纤特别有用。

    Poled electro-optic device and method
    7.
    发明授权
    Poled electro-optic device and method 失效
    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。

    Multi-path interference filter
    8.
    发明授权
    Multi-path interference filter 失效
    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。

    Dispersion shifted optical waveguide
    9.
    发明授权
    Dispersion shifted optical waveguide 失效
    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。

    Asymmetrical bidirectional telecommunication system
    10.
    发明授权
    Asymmetrical bidirectional telecommunication system 失效
    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。