公开(公告)号：US20040196536A1

公开(公告)日：2004-10-07

申请号：US10791382

申请日：2004-03-03

Applicant: ALCATEL

Inventor： Ekaterina Bourova ,  Christian Simonneau ,  Catherine Martinelli ,  Lionel Provost

IPC: H01S003/00

CPC classification number: H01S3/06754 ,  H01S3/0672 ,  H01S3/1608 ,  H01S3/302 ,  H01S2301/04

Abstract: The amplifying optical fiber (1) comprises a single-mode core (10) and a multimode core (20) surrounding the single-mode core, the multimode core containing a doped layer referred to as a nulldoped ringnull (21) and having a certain concentration of active rare earth ions (6) to perform amplification by active rare earth ions on at least one optical signal for injection into the amplifying fiber. The fiber is dimensioned so that the product of its length multiplied by its Raman efficiency is greater than or equal to 0.5 Wnull1. In addition, the fiber presents absorption defined by an absorption coefficient expressed in dB/m, which absorption presents, at a certain wavelength, a maximum value referred to as the nullabsorption maximumnull, the fiber presents accumulated absorption, corresponding to the product of its length multiplied by the absorption maximum, that is greater than or equal to 100 dB. The invention also provides an amplifier including such a fiber, a single-mode pump, and a multimode pump.

Abstract translation: 放大光纤（1）包括单模核心（10）和围绕单模核心的多模核心（20），所述多模核心包含被称为“掺杂环”（21）的掺杂层，并且具有 一定浓度的活性稀土离子（6）通过活性稀土离子在至少一个光信号上进行放大以注入到放大光纤中。 纤维的尺寸使其长度乘以其拉曼效率的乘积大于或等于0.5W -1。 此外，纤维呈现由以dB / m表示的吸收系数定义的吸收，该吸收在一定波长处呈现称为“吸收最大值”的最大值，纤维呈现累积吸收，对应于 其长度乘以吸收最大值，即大于或等于100 dB。 本发明还提供一种包括这种光纤的放大器，单模式泵和多模式泵。

公开(公告)号：US20040141227A1

公开(公告)日：2004-07-22

申请号：US10752677

申请日：2004-01-08

Applicant: ALCATEL

Inventor： Gabriel Charlet ,  Christian Simonneau

IPC: H01S003/00

CPC classification number: H04B10/2941 ,  H01S3/094003 ,  H01S3/2375 ,  H01S3/302 ,  H04B10/2916

Abstract: An Optical transmission system (10) is presented that comprises at least one transmitter (12), at least one transmission line (14), at least one optical fiber amplifier (18), and at least one receiver (21), the optical fiber amplifier (18) being designed to show a flat characteristic of output power versus wavelength. The optical fiber amplifier (18) is designed to show the flat output characteristic in response to a flat characteristic of a first input power level versus wavelength. At least one coupler (28) for coupling at least one Raman amplifier (30) to the optical transmission system (10) is provided, the Raman amplifier (30) having a Raman gain that is tilted in a direction opposite to a tilt of the optical fiber amplifier (18) that would occur in response to a flat characteristic of a second input power level versus wavelength. Thereby, an optical transmission system (10) is presented that can be upgraded to improve OSNR while maintaining a flat output characteristic.

Abstract translation: 提供一种光传输系统（10），其包括至少一个发射器（12），至少一个传输线（14），至少一个光纤放大器（18）和至少一个接收器（21），所述光纤 放大器（18）被设计为显示输出功率对波长的平坦特性。 光纤放大器（18）被设计成响应于第一输入功率电平对波长的平坦特性来显示平坦输出特性。 提供了用于将至少一个拉曼放大器（30）耦合到光传输系统（10）的至少一个耦合器（28），所述拉曼放大器（30）具有在与所述光传输系统（10）的倾斜相反的方向上倾斜的拉曼增益 光纤放大器（18）将响应于第二输入功率电平对波长的平坦特性而发生。 因此，提供了一种光传输系统（10），其可以升级以改善OSNR，同时保持平坦的输出特性。

公开(公告)号：US20040240042A1

公开(公告)日：2004-12-02

申请号：US10827303

申请日：2004-04-20

Applicant: ALCATEL

Inventor： Gabriel Charlet ,  Christian Simonneau

IPC: H01S003/00

CPC classification number: H04B10/2941

Abstract: The invention discloses an optical amplifier (18) that amplifies signal light in a signal band in a fiber optic transmission system (10) having at least first and second optically pumped signal light gain amplifying stages (30), a tilt controller (40) linked to a control unit, a optical monitor (34) analyzing signal powers, characterized in that the amplified spontaneous emission of the optical amplifier (18) is measured at two extreme wavelengths of the signal band to derive control signals (44) for at least the tilt controller (40).

Abstract translation: 本发明公开了一种光放大器（18），其放大至少具有第一和第二光泵浦信号光增益放大级（30）的光纤传输系统（10）中的信号频带中的信号光，倾斜控制器（40）连接 控制单元，分析信号功率的光学监视器（34），其特征在于，在所述信号频带的两个极端波长处测量所述光放大器（18）的放大的自发发射以导出至少所述控制信号（44）的控制信号 倾斜控制器（40）。

公开(公告)号：US20040085623A1

公开(公告)日：2004-05-06

申请号：US10671482

申请日：2003-09-29

Applicant: ALCATEL

Inventor： Lionel Provost ,  Christian Simonneau ,  Isabelle Bongrand ,  Philippe Bousselet ,  Christine Moreau ,  Dominique Bayart ,  Laurent Gasca

IPC: H01S003/00

CPC classification number: H01S3/06708 ,  H01S3/06729 ,  H01S3/06754 ,  H01S3/094007

Abstract: An optical fiber amplifier is considered comprising a mono-mode core, a first cladding around said core and at least a further cladding around said first cladding while said first cladding includes a ring shaped active region doped with rare earth material surrounding said mono-mode core. Advantageously, the first cladding is designed with a radial refractive index following an almost continuous decreasing function for increasing radius. The use of a continuously decreasing refractive index for the cladding at the outer border of the ring shaped active medium optimize the efficiency of the coupling between the core and the cladding.

Abstract translation: 认为光纤放大器包括单模芯，围绕所述芯的第一包层和围绕所述第一包层的至少另一包层，而所述第一包层包括掺杂有围绕所述单模芯的稀土材料的环形有源区 。 有利地，第一包层被设计成具有径向折射率，跟随用于增加半径的几乎连续的减小函数。 在环形有源介质的外边界处对包层的连续降低的折射率的使用优化了芯和包层之间的耦合的效率。