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26 条记录 (耗时 0.034 秒)

    Optical fiber bendable coupler/switch device
    4.
    发明授权
    Optical fiber bendable coupler/switch device 失效
    光纤弯曲耦合器/开关装置

    公开(公告)号：US5353363A

    公开(公告)日：1994-10-04

    申请号：US143753

    申请日：1993-11-01

    申请人： Donald B. Keck ,  Mark A. Newhouse ,  David L. Weidman

    发明人： Donald B. Keck ,  Mark A. Newhouse ,  David L. Weidman

    IPC分类号： G02B6/28 ,  G02B6/35 ,  G02B6/24

    CPC分类号： G02B6/3504 ,  G02B6/2856 ,  G02B6/3536 ,  G02B6/3548 ,  G02B6/3572 ,  G02B6/3578

    摘要： A 1.times.N fiber optic switch is disclosed for selectively coupling light from a first fiber to any one of a plurality of output fibers. The switch includes a coupler in which the first optical fiber and the plurality of optical fibers are elongated in a narrowed coupling region. The coupling region can be bent in various directions to cause the radius of curvature of the input fiber to differ from that of at least one of the output fibers, whereby light propagating in the input fiber can be coupled to only one of the output fibers or to more than one of those fibers.

    摘要翻译： 公开了一种1xN光纤开关，用于将来自第一光纤的光选择性地耦合到多个输出光纤中的任何一个。 开关包括耦合器，其中第一光纤和多个光纤在窄耦合区域中伸长。 耦合区域可以沿各个方向弯曲，以使输入光纤的曲率半径与至少一个输出光纤的曲率半径不同，由此在输入光纤中传播的光可以仅耦合到输出光纤中的一个或 到多于一种纤维。

    Non-adiabatically-tapered connector
    5.
    发明授权
    Non-adiabatically-tapered connector 失效
    非绝热锥形连接器

    公开(公告)号：US4877300A

    公开(公告)日：1989-10-31

    申请号：US261270

    申请日：1988-10-24

    申请人： Mark A. Newhouse ,  Daniel A. Nolan ,  David L. Weidman

    发明人： Mark A. Newhouse ,  Daniel A. Nolan ,  David L. Weidman

    IPC分类号： G02B6/14 ,  G02B6/26 ,  G02B6/42

    CPC分类号： G02B6/4202 ,  G02B6/262

    摘要： Disclosed is a mode field modifier which can be used in a fiber-to-fiber connector or a source-to-fiber connector. In a downtaper-type mode field modifier embodiment, the modifier comprises a modifier core of refractive index n.sub.1 surrounded by first and second cladding layers having refractive indices n.sub.2 and n.sub.3, respectively. In an uptaper-type mode field modifier embodiment, the modifier comprises a modifier core of refractive index n.sub.1 surrounded by a cladding layer having a refractive index n.sub.2. The refractive indices are such that n.sub.1 >n.sub.2 >n.sub.3. In both embodiments, there is a nonadiabatic taper intermediate the ends of the mode field modifier, whereby a substantial amount of mode coupling occurs therein.

    Optical fiber amplifier and coupler
    6.
    发明授权
    Optical fiber amplifier and coupler 失效
    光纤放大器和耦合器

    公开(公告)号：US5179603A

    公开(公告)日：1993-01-12

    申请号：US671075

    申请日：1991-03-18

    申请人： Douglas W. Hall ,  William J. Miller ,  Thomas W. Webb ,  David L. Weidman

    发明人： Douglas W. Hall ,  William J. Miller ,  Thomas W. Webb ,  David L. Weidman

    IPC分类号： G02F1/35 ,  G02B6/28 ,  G02B6/287 ,  G02B6/34 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/094 ,  H01S3/10

    CPC分类号： G02B6/29332 ,  G02B6/2835 ,  H01S3/06754

    摘要： Disclosed is a fiber amplifier system in which a gain fiber is operatively combined with a fiber optic coupler having first and second coupler optical fibers. The coupler fibers are fused together along a portion of their lengths to form a wavelength dependent coupling region whereby most of the light power of a wavelength .lambda..sub.s couples between them, and most of the light power of a wavelength .lambda..sub.p that is introduced into the first fiber remains in it. The mode field diameter of the first coupler fiber is substantially matched to that of the gain fiber and is smaller than that of the second coupler fiber. One end of the first coupler fiber is spliced to the gain fiber. A transmission fiber is spliced to the second coupler fiber, and a laser diode introduces pumping light of wavelength .lambda..sub.p to the first coupler fiber. The fiber optic coupler preferably includes an elongated body of matrix glass through which the first and second coupler fibers extend. The matrix glass has a refractive index n.sub.3 that is lower than that of the fiber claddings. The fibers are fused together along with the midregion of the matrix glass, the fiber cores being more closely spaced at the central portion of the midregion than at the body endfaces, thereby forming the coupling region.

    Fiber optic coupler exhibiting low nonadiabatic loss
    7.
    发明授权
    Fiber optic coupler exhibiting low nonadiabatic loss 失效
    表现出低非绝热损耗的光纤耦合器

    公开(公告)号：US5412745A

    公开(公告)日：1995-05-02

    申请号：US238384

    申请日：1994-05-05

    申请人： David L. Weidman ,  Donald R. Young, Jr.

    发明人： David L. Weidman ,  Donald R. Young, Jr.

    IPC分类号： G02B6/02 ,  G02B6/26 ,  G02B6/28 ,  G02B6/287

    CPC分类号： G02B6/2835 ,  G02B6/03633

    摘要： A fiber optic coupler comprising a plurality of single-mode optical fibers, each of which is tapered to form a small diameter section that extends in contiguous relationship with the small diameter sections of the other fibers to form a coupling region. Each of the fibers has a core surrounded by a cladding of refractive index lower than that of the core. At least one of the fibers has a refractive index pedestal of refractive index n.sub.i between said core and cladding, wherein n.sub.1 >n.sub.i >n.sub.2, n.sub.1 and n.sub.2 being the refractive indices of the core and cladding, respectively.

    摘要翻译： 一种光纤耦合器，包括多个单模光纤，每个单模光纤被锥形以形成与其它光纤的小直径部分相邻延伸的小直径部分，以形成耦合区域。 每个纤维具有由折射率低于芯的折射率的包层包围的芯。 所述纤维中的至少一个在所述芯和包层之间具有折射率为ni的折射率基座，其中n1，n2，n1和n2分别是芯和包层的折射率。

    Optical waveguide fiber achromatic coupler
    8.
    发明授权
    Optical waveguide fiber achromatic coupler 失效
    光纤光纤消色耦合器

    公开(公告)号：US5295210A

    公开(公告)日：1994-03-15

    申请号：US999296

    申请日：1992-12-31

    申请人： Daniel A. Nolan ,  David L. Weidman

    发明人： Daniel A. Nolan ,  David L. Weidman

    IPC分类号： G02B6/28 ,  G02B6/26

    CPC分类号： G02B6/2835 ,  G02B6/2856

    摘要： An achromatic fiber optic coupler of the type wherein three single-mode optical fibers are fused together along a portion of the lengths thereof to form a coupling region. Each fiber includes a core and a cladding, the lowest refractive index of the fiber claddings being n.sub.2. The fibers are disposed in a triangular array in the coupling region. A matrix glass body of refractive index n.sub.3 surrounds the coupling region, n.sub.3 being lower than n.sub.2 by such an amount that the value of .DELTA..sub.2-3 is less than 0.125%, wherein .DELTA..sub.2-3 equals (n.sub.2.sup.2' -n.sub.3.sup.2)/2n.sub.2.sup.2.

    摘要翻译： 这种类型的消色差光纤耦合器，其中三个单模光纤沿其长度的一部分熔合在一起以形成耦合区域。 每个光纤包括芯和包层，光纤包层的最低折射率为n2。 纤维在耦合区域中以三角形阵列布置。 折射率为n3的矩阵玻璃体围绕耦合区域，n3低于n2，使得（Delta）2-3的值小于0.125％，其中（Delta）2-3等于（n22'- n32）/ 2n22。

    Athermal optical devices employing negative expansion substrates
    9.
    发明授权
    Athermal optical devices employing negative expansion substrates 有权
    采用负极膨胀衬底的热光器件

    公开(公告)号：US07254297B1

    公开(公告)日：2007-08-07

    申请号：US09203166

    申请日：1998-12-01

    申请人： George H. Beall ,  David L. Weidman

    发明人： George H. Beall ,  David L. Weidman

    IPC分类号： G02B6/26

    CPC分类号： G02B6/0218

    摘要： An athermal optical device and a method for producing the device, such as an athermal optical fiber reflective grating, are described. The athermal optical fiber reflective grating device comprises a negative expansion substrate, an optical fiber mounted on the substrate surface, and a grating defined in the optical fiber. The method for producing the athermal optical fiber reflective grating device comprises providing a negative expansion substrate, mounting an optical fiber with at least one reflective grating defined therein onto the substrate upper surface, and affixing the optical fiber to the substrate at at least two spaced apart locations.

    摘要翻译： 描述了一种无热光学器件及其制造方法，如无热光纤反射光栅。 无热光纤反射光栅装置包括负扩展基板，安装在基板表面上的光纤和光纤中限定的光栅。 制造无光纤光纤反射光栅装置的方法包括提供负扩展基板，将其中限定有至少一个反射光栅的光纤安装在基板上表面上，并将光纤以至少两个间隔开的方式固定到基板 位置。

    Dispersion compensating module and mode converter, coupler and dispersion compensating optical waveguide therein
    10.
    发明授权
    Dispersion compensating module and mode converter, coupler and dispersion compensating optical waveguide therein 失效

    公开(公告)号：US06640031B2

    公开(公告)日：2003-10-28

    申请号：US10171316

    申请日：2002-06-12

    申请人： Liang Dong ,  Gang Qi ,  David L. Weidman

    发明人： Liang Dong ,  Gang Qi ,  David L. Weidman

    IPC分类号： G02B634

    CPC分类号： G02B6/02014 ,  G02B6/02023 ,  G02B6/02261 ,  G02B6/0228 ,  G02B6/03611 ,  G02B6/03644 ,  G02B6/0365 ,  G02B6/03672 ,  G02B6/14 ,  G02B6/29377

    摘要： A dispersion compensating module, mode converter, coupler and dispersion compensated optical fiber therein. The dispersion compensating fiber has a plurality of core segments, the refractive index profile being selected to exhibit properties such that an LP02 mode at 1550 nm may be propagated a distance (generally 0.5-3.0 km), upon conversion to LP02, to compensate for dispersion of a length of transmission waveguide preferably greater than 25 km propagating in an LP01 mode. In another embodiment, the dispersion compensating module has a mode converter having a reflective fiber grating for converting a first to a second mode interconnected to a dispersion compensated fiber propagating in the second mode. The mode converter has a coupler adapted to operatively couple light propagating in a first mode from a first fiber into a second, and a reflective fiber grating operatively coupled to the second fiber; the grating being capable of converting light from the first into the second mode. According to another embodiment, an optical fiber coupler is provided having a first fiber with a first propagation constant in a first mode, and a second fiber within the coupler having a second propagation constant, the second fiber including a necked-down portion which is formed prior to fusion of the fibers, the necked-down portion being formed such that the local propagation constant of the second fiber substantially matches the first propagation constant thereby enhancing first mode coupling.