利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

211 条记录 (耗时 0.014 秒)

    Multiplexing/demultiplexing optical circuit
    2.
    发明公开
    Multiplexing/demultiplexing optical circuit 审中-公开
    光学复用/解复用电路

    公开(公告)号：EP1126293A3

    公开(公告)日：2004-02-25

    申请号：EP00310572.3

    申请日：2000-11-29

    申请人： JDS Uniphase Inc.

    发明人： Xiaoli, Fu ,  Jimin, Xie

    IPC分类号： G02B6/293 ,  G02B6/34

    CPC分类号： G02B6/29338 ,  G02B6/29332 ,  G02B6/29358 ,  G02B6/2938 ,  G02B6/29386 ,  H04J14/02

    摘要： A circuit for de-interleaving or interleaving multichannel optical signals having a predetermined inter-channel frequency spacing, uses a plurality of sequentially coupled periodic filters of a similar free spectral range, for example Fabry-Perot etalon-based interleavers/de-interleavers. The spectral response of the consecutive filters is shifted to accommodate different channel groupings. The free-spectral range of each of the interleavers is similar and the channel period is larger than two adjacent inter-channel frequency spacings of an input optical signal.

    ADD/DROP MULTIPLEXER
    4.
    发明授权
    ADD/DROP MULTIPLEXER 失效
    光插入和ABTRENNMULTIPLEXER

    公开(公告)号：EP0842574B1

    公开(公告)日：2002-04-03

    申请号：EP96926471.2

    申请日：1996-08-02

    申请人： ALCATEL

    发明人： JONES, Kevan, Peter ,  PETTITT, Martin

    IPC分类号： H04J3/08 ,  H04J14/02

    CPC分类号： G02B6/2932 ,  G02B6/29332 ,  G02B6/29353 ,  G02B6/29383 ,  G02B6/29398 ,  H04J14/0204 ,  H04J14/0206 ,  H04J14/0213 ,  H04J14/0217

    摘要： A number of add/drop multiplexers comprising passive optical components for wavelength division multiplexing are described. These add/drop multiplexers are particularly adapted for use in branching units (10) of such networks to allow signals passing along fibres (1, 2, 11, 12) of a main trunck between terminal stations (20, 30) to be dropped to and added from a spur station (40), the design of the add/drop multiplexers allowing a reduced number of spur fibres (3, 13) to be used as signals are routed between trunk fibres (1, 2, 11, 12) at spur fibres (3, 13) according to carrier wavelength.

    ALL FIBER GAIN FLATTENING OPTICAL FILTER
    6.
    发明公开
    ALL FIBER GAIN FLATTENING OPTICAL FILTER 审中-公开
    所有光纤增益平坦光纤滤波器

    公开(公告)号：EP1119787A2

    公开(公告)日：2001-08-01

    申请号：EP99968838.5

    申请日：1999-09-23

    申请人： Fiver Laboratories

    发明人： WU, Weiti ,  KO, Yu-Li ,  CHUNG, Gary

    IPC分类号： G02B6/26 ,  G02B6/02 ,  H01S3/30

    CPC分类号： G02B6/29332 ,  G02B6/2551 ,  G02B6/266

    摘要： An all fiber optical filter (32) is formed by streching an optical fiber. The all fiber filter includes a core (34), an inner cladding (36), and an outer cladding (38). A core (34) index of refraction is greater than an outer cladding (38) index of refraction, and the outer cladding (38) index of refraction is greater than the inner cladding (36) index of refraction. The filter attenuates optical signals by transferring energy from the core (34) to the outer cladding (38) by evanescent coupling. The filter can be used for gain flattening in a WDM communication system (66) with EDFAs. The filter is manufactured by holding a length of an appropriate optical fiber (82) between two clamps (74, 76), heating the fiber (82) and stretching the fiber (82) until the desired filtering characteristics are achieved.

    摘要翻译： 全光纤滤光器（32）通过拉伸光纤形成。 全纤维滤波器包括芯（34），内包层（36）和外包层（38）。 芯（34）的折射率大于外包层（38）的折射率，并且外包层（38）的折射率大于内包层（36）的折射率。 滤波器通过瞬逝耦合将能量从芯（34）传递到外包层（38）来衰减光信号。 该滤波器可以用于带有EDFA的WDM通信系统（66）中的增益平坦化。 通过在两个夹具（74,76）之间保持一段适当的光纤（82），加热光纤（82）并拉伸光纤（82）直到获得所需的滤波特性来制造滤波器。

    Add/drop filters and multiplexers fabricated from cladding mode couplers and fiber bragg gratings
    7.
    发明公开
    Add/drop filters and multiplexers fabricated from cladding mode couplers and fiber bragg gratings 审中-公开
    Einfüge-/ Auskoppel过滤器和过滤器Mantelmoden-Kopplern und Faser-Bragg-gitter hergestelltem Multiplexer

    公开(公告)号：EP0996007A2

    公开(公告)日：2000-04-26

    申请号：EP99203461.1

    申请日：1999-10-21

    申请人： Thomas & Betts International, Inc.

    发明人： Cryn, Colm V.

    IPC分类号： G02B6/293

    CPC分类号： G02B6/2932 ,  G02B6/2835 ,  G02B6/29319 ,  G02B6/29332 ,  G02B6/29383

    摘要： An optical fiber add/drop filter includes a first and second elongate photosensitive optical fiber, each optical fiber having opposed first and second ends and including a core and a cladding. The cladding of the first optical fiber is optically coupled to the cladding of the second optical fiber at a coupler. A first fiber Bragg grating is etched into a second end of the first fiber for converting light propagating in a first direction through either of the core of cladding of the first fiber into light propagating in an opposite direction through the other of said core and cladding of said second fiber. A second fiber Bragg grating is etched into a first end of the second fiber for converting light propagating in a first direction either of the core or cladding of the second fiber into light propagating in an opposite direction through the other of the core and cladding of the second fiber. The first and second fiber Bragg gratings are located to opposite sides of the coupler. The add/drop filter of the present invention may be cascaded to form an optical add/drop multiplexer.

    摘要翻译： 一种光纤分插滤波器包括第一和第二细长光敏光纤，每个光纤具有相对的第一和第二端并且包括芯和包层。 第一光纤的包层在耦合器处光耦合到第二光纤的包层。 第一光纤布拉格光栅被蚀刻到第一光纤的第二端，用于将在第一方向上传播的光通过第一光纤的包芯中的任一个转变成通过另一个所述芯和包层的相反方向传播的光 第二根纤维。 第二光纤布拉格光栅被蚀刻到第二光纤的第一端中，用于将在第二光纤的芯或包层中的任一个的第一方向上传播的光转换成沿相反方向传播的光，穿过第二光纤的芯和包层中的另一个 第二根纤维。 第一和第二光纤布拉格光栅位于耦合器的相对侧。 本发明的分插滤波器可以级联以形成光分插复用器。

    Branch device for optical multiplex system
    9.
    发明公开
    Branch device for optical multiplex system 失效
    Vorrichtung zum Abzweigen在einem optischen Multiplexsystem

    公开(公告)号：EP0768771A2

    公开(公告)日：1997-04-16

    申请号：EP96106102.5

    申请日：1996-04-18

    申请人： FUJITSU LIMITED

    发明人： Harasawa, Shinichirou, c/o Fujitsu Ltd., Pat. Dep. ,  Fujiwara, Haruo, c/o Fujitsu Ltd., Pat. Dep.

    IPC分类号： H04J14/02 ,  H04B10/213

    CPC分类号： G02B6/2938 ,  G02B6/29332 ,  H04J14/0206 ,  H04J14/0213 ,  H04J14/0217

    摘要： A branch device for use in an optical multiplex system allows three stations to be interconnected by a relatively small number of optical fibers. The branch device has WDM couplers each having a port A connected to a port C through a through path and to a port D through a cross path, and a port B connected to the port C through a cross path and to the port D through a through path. A signal light having a wavelength λ AB in a through-path wavelength band, inputted from a cable end A, is transmitted through a through path in one of the WDM couplers to a cable end B. A signal light having a wavelength λ AC in a cross-path wavelength band, inputted from the cable end A, is transmitted through a cross path in the WDM coupler to the B port thereof, and then transmitted through a cross path in another WDM coupler to a cable end C. Similarly, signal lights inputted from the other cable ends B, C are divided and transmitted through paths depending on their wavelengths. Stations can be connected to the branch device by transmission cables each comprising a single pair of optical fibers for bidirectional transmission of signal lights between the stations through the branch device. A repeater on each of the transmission cables may be of a single-system configuration for upstream and downstream transmission.

    摘要翻译： 用于光学多路复用系统的分支装置允许三个站由相对较少数量的光纤互连。 分支设备具有WDM耦合器，每个端口A通过通路连接到端口C，并且通过交叉路径连接到端口D，并且端口B通过交叉路径连接到端口C，并且通过端口B通过交换路径连接到端口D 通过路径。 从电缆端A输入的通路波长带中具有波长λAB的信号光通过WDM耦合器之一中的通路传输到电缆端B.具有波长λAC的信号光 从电缆端A输入的交叉路径波长带通过WDM耦合器中的交叉路径传输到其B端口，然后通过另一WDM耦合器中的交叉路径传输到电缆端C.类似地，信号 从其他电缆端B，C输入的灯根据其波长被划分并通过路径传输。 各站可以通过传输电缆连接到分支设备，每个传输电缆包括一对光纤，用于通过分支设备在站之间双向传输信号灯。 每个传输电缆上的中继器可以是用于上行和下行传输的单系统配置。