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    Temperature-compensated rare earth doped optical waveguide amplifiers
    12.
    发明公开
    Temperature-compensated rare earth doped optical waveguide amplifiers 有权
    稀土掺杂的光纤放大器的温度补偿

    公开(公告)号：EP1003253A3

    公开(公告)日：2003-08-06

    申请号：EP99308905.1

    申请日：1999-11-09

    Applicant: LUCENT TECHNOLOGIES INC.

    Inventor： Espindola, Rolando Patricio ,  Strasser, Thomas Andrew ,  Wagener, Jefferson Lynn ,  Wysocki, Paul Francis

    IPC: H01S3/067

    CPC classification number: H04B10/2941 ,  H01S3/06758 ,  H01S3/10023 ,  H01S2301/04

    Abstract: In accordance with the invention, a temperature-dependent rare earth doped waveguide optical amplifier is compensated by a temperature-dependent loss filter. The filter characteristics are designed to be temperature-dependent filters so that the gain characteristic of the amplifier is compensated over a practical operating temperature range. In essence, the amplifier comprises a length of optical waveguide for transmitting optical signals, a rare earth doped amplifying region in the waveguide for amplifying the transmitted optical signals, a pumping source for optically pumping the amplifying region, and a temperature-dependent loss filter. A typical design compensates an EFDA to a variation of less than 1 dB over a temperature range of -40°C to 85°C and a spectral range of at least 20 nm.

    Arrangement for mitigating first-order and second-order polarization mode dispersion in optical fiber communication systems
    14.
    发明公开
    Arrangement for mitigating first-order and second-order polarization mode dispersion in optical fiber communication systems 审中-公开
    安排用于减少光传输系统的第一和第二阶的偏振模色散

    公开(公告)号：EP1087245A3

    公开(公告)日：2002-06-05

    申请号：EP00307836.7

    申请日：2000-09-11

    Applicant: LUCENT TECHNOLOGIES INC.

    Inventor： Strasser, Thomas Andrew ,  Wagener, Jefferson Lynn

    IPC: G02B6/34 ,  G02B6/293 ,  H04B10/18

    CPC classification number: G02B6/278 ,  H04B10/2569

    Abstract: A compensation arrangement for addressing the problem of first-order and second-order polarization mode dispersion (PMD) in an optical fiber communication system includes separate, independent elements for each type of PMD. First-order PMD may be compensated using conventional techniques related to adjusting the transit time differential between the polarization states. The second-order polarization mode dispersion is compensated by recognizing the separate sources of second-order PMD (pulse broadening analogous to chromatic dispersion, additional pulse broadening due to optical filtering (narrowing), and coupling of a portion of the optical signal into the orthogonal polarization relative to the main pulse with a different transmit time). A chirped fiber grating with a variable temperature gradient, a complementary optical filter with variable spectral transmission and a polarizer, respectively, can be used to compensate for these three sources of second-order PMD.

    Optical fiber gratings with index matched polymer coatings for cladding mode suppression
    15.
    发明公开
    Optical fiber gratings with index matched polymer coatings for cladding mode suppression 审中-公开
    Glasfasergitter，welting einen Polymermantel mit angepasstem Brechungsindex zurMantelmodenunterdrückungbeinhaltet

    公开(公告)号：EP1146357A2

    公开(公告)日：2001-10-17

    申请号：EP01301461.8

    申请日：2001-02-19

    Applicant: LUCENT TECHNOLOGIES INC.

    Inventor： Hale, Arturo ,  Strasser, Thomas Andrew ,  Westbrook, Paul Stephen

    IPC: G02B6/16

    CPC classification number: G02B6/02104 ,  G02B6/02033

    Abstract: In accordance with the invention, an optical fiber Bragg grating comprises a length of gloss optical fiber having a core, a Bragg grating formed along the core, a glass cladding and a polymer coating on the cladding having an index of refraction matched to that the cladding. Such index matching can reduce the cladding mode loss by a factor of four over current levels. A preferred coating material comprises fluorinated urethane acrylate.

    Abstract translation: 根据本发明，光纤布拉格光栅包括具有芯的长度的光泽光纤，沿着芯形成的布拉格光栅，玻璃包层和包层上的聚合物涂层，其折射率与包层匹配 。 这种折射率匹配可以将包层模式损耗降低四倍以上的电流水平。 优选的涂料包括氟化聚氨酯丙烯酸酯。

    Optical communication system with Raman amplification
    16.
    发明公开
    Optical communication system with Raman amplification 有权
    OptischesÜbertragungssystemmit Raman-Verstärkung

    公开(公告)号：EP1130704A2

    公开(公告)日：2001-09-05

    申请号：EP01301417.0

    申请日：2001-02-19

    Applicant: LUCENT TECHNOLOGIES INC.

    Inventor： Ackerman, David Alan ,  Bacher, Kenneth L. ,  Dautremont-Smith, William Crossley ,  Du, Mei ,  Rottwitt, Karsten ,  Stentz, Andrew John ,  Strasser, Thomas Andrew ,  Zhang, Liming

    IPC: H01S3/30 ,  H04B10/17

    CPC classification number: H04B10/2916 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/09408 ,  H01S3/094096 ,  H01S3/302 ,  H01S5/1096 ,  H01S2301/03

    Abstract: A fiber Raman amplifier is configured to use a co-propagating Raman pump source, which may be beneficial in a variety of system configurations (for example, in bidirectional communication systems). By carefully configuring the pump source characteristics, sufficient optical gain can be achieved in the co-propagating arrangement, the characteristics including: (1) using an optical pump power of at least 50mW, (2) having a relatively large spectral bandwidth within the pump (to suppress SBS); and (3) a frequency difference between all longitudinal pump modes of each pump laser being separated by at least the walk-off frequency between the pump laser frequency and the signal frequency, and all intense longitudinal modes between different pump lasers being separated by at least the electrical bandwidth of the communication system.

    Abstract translation: 光纤拉曼放大器被配置为使用共同传播的拉曼泵浦源，其可以在各种系统配置（例如，双向通信系统）中是有益的。 通过仔细配置泵浦源特性，可以在共同传播装置中实现足够的光学增益，其特征包括：（1）使用至少50mW的光泵功率，（2）在泵内具有相对较大的光谱带宽 （抑制SBS）; 和（3）每个泵浦激光器的所有纵向泵浦模式之间的频率差异至少被泵浦激光器频率和信号频率之间的离散频率分开，并且不同泵浦激光器之间的所有强烈纵向模式至少被分离 通信系统的电气带宽。

    Article comprising a bragg grating in a few-moded optical waveguide
    20.
    发明公开
    Article comprising a bragg grating in a few-moded optical waveguide 有权
    einem wenig-modigen optischen Wellenleiter的Vorrichtung mit einem Bragg-Gitter

    公开(公告)号：EP1160596A1

    公开(公告)日：2001-12-05

    申请号：EP00310955.0

    申请日：2000-12-08

    Applicant: LUCENT TECHNOLOGIES INC.

    Inventor： Strasser, Thomas Andrew ,  Westbrook, Paul Stephen

    IPC: G02B6/293 ,  G02B6/124 ,  G02B6/14

    CPC classification number: G02B6/03633 ,  G02B6/02052 ,  G02B6/02119 ,  G02B6/03638 ,  G02B6/0365 ,  G02B6/03694 ,  G02B6/12007 ,  G02B6/14

    Abstract: Disclosed is an article that comprises an optical waveguide mode converter for converting light of wavelength λ in a few-moded optical waveguide from a given guided mode (e.g., LP 01.f ) to another guided mode (e.g., LP 02.b ). The converter comprises a tilted refractive index grating in the core of the waveguide. Appropriate choice of the refractive index profile n(r), photosensitivity p(r) and tilt angleθ makes possible substantial nulling of the coupling between some guided modes (e.g., LP 01.f to LP 01.b , and LP 01.f to LP 11.b ), and substantial maximization of the coupling between other guided modes (e.g., LP 01.f to LP 02.b ). Mode converters according to the invention can be advantageously used in optical fiber communication systems in add/drop multiplexers.

    Abstract translation: 公开了一种物品，其包括用于将几个光波导中的波长λ的光从给定的引导模式（例如，LP01.f）转换到另一个引导模式（例如LP02.b）的光波导模式转换器。 该转换器包括在波导芯体中的倾斜折射率光栅。 适当选择折射率分布n（r），光敏度p（r）和倾斜角度; 使一些引导模式（例如，LP01.f到LP01.b和LP01.f到LP11.b）之间的耦合可能基本上为零，以及其他引导模式（例如，LP01.f到LP02之间的耦合）的实质最大化 .B）。 根据本发明的模式转换器可以有利地用于分插复用器中的光纤通信系统中。

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