Optical fiber telecommunication system
    81.
    发明公开
    Optical fiber telecommunication system 失效
    Faseroptischer电信系统

    公开(公告)号:EP0883217A1

    公开(公告)日:1998-12-09

    申请号:EP97109212.7

    申请日:1997-06-06

    发明人: Sniadower, Lucjan

    IPC分类号: H01S3/06 H04B10/17

    摘要: The present invention relates to an optical fiber telecommunication system and more in particular to an optical telecommunication system having a high loss transmission line. It relates also to an optical fiber amplifier doped with a rare earth, such as erbium, for use in said system.
    The optical fiber telecommunication system comprising:

    a transmission station (104) producing at least one transmission optical signal in a predetermined wavelength band carrying the information;
    a receiving station (108) for receiving said transmission optical signal;
    an optical fiber line (106) connecting said transmission station and said receiving station, and
    at least one optical fiber amplifier (105) connected along said line for amplifying said transmission optical signal, said amplifier having a total optical output power greater than 20dBm.

    The optical fiber amplifier for amplifying a transmission optical signal comprising:

    a first stage and a second stage;
    an isolator (8) placed between the first stage and the second stage;
    in which the second stage comprises:

    an erbium doped fiber;
    pump means comprising two pump sources (10,11) at different wavelengths in a second stage pump wavelengths band;
    a WDM coupling means coupling said different wavelengths as a composite second stage pump signal;
    a coupler (13) coupling said composite second stage pump signal and said transmission optical signal to said erbium doped fiber.

    摘要翻译: 光纤通信系统技术领域本发明涉及光纤通信系统,更具体地涉及具有高损耗传输线路的光通信系统。 它还涉及掺杂有诸如铒的稀土的光纤放大器,用于所述系统中。 所述光纤通信系统包括:发送站(104),其在携带所述信息的预定波长带中产生至少一个传输光信号; 接收站(108),用于接收所述传输光信号; 连接所述发送站和所述接收站的光纤线路(106)以及沿所述线路连接的用于放大所述传输光信号的至少一个光纤放大器(105),所述放大器的总光输出功率大于20dBm。 用于放大传输光信号的光纤放大器,包括:第一级和第二级; 放置在第一级和第二级之间的隔离器(8) 其中第二级包括:掺铒光纤; 泵装置包括在第二级泵波长带中具有不同波长的两个泵浦源(10,11); 将所述不同波长耦合的WDM耦合装置作为复合第二级泵浦信号; 将所述复合第二级泵浦信号和所述传输光信号耦合到所述掺铒光纤的耦合器(13)。

    Optical arrangement for amplifying WDM signals
    82.
    发明公开
    Optical arrangement for amplifying WDM signals 失效
    Optische Anordnung zurVerstärkungvon WDM Signalen

    公开(公告)号:EP0851617A2

    公开(公告)日:1998-07-01

    申请号:EP97310379.9

    申请日:1997-12-19

    申请人: AT&T Corp.

    发明人: Glance, Bernard

    IPC分类号: H04B10/24 H04B10/17

    摘要: An amplification circuit for amplifying wavelength-division-multiplexed (WDM) optical signals in a fiber-optic network is presented. The amplification circuit amplifies WDM signals propagating simultaneously in both directions through a fiber-optic link with a single unidirectional optical amplifier.

    摘要翻译: 放大电路,用于放大光纤网络中多个波分复用信号,具有多个用于同时双向传播信号数量的链路。 该电路包括一个光放大器。 频率路由器电路耦合到网络的第一部分,放大器和网络的第二部分。 频率路由器电路从网络的第一部分接收信号的第一子数,并从网络的第二部分接收信号的第二子数,复用信号的两个子数,并且路由 多路复用信号到放大器。 放大器放大多路复用信号。 频率路由器电路从放大器接收放大的信号子数,将其解复用并将放大的第一子信号路由到网络的第二部分,并将放大的第二子信号路由到 网络的第一部分。

    Device and method to suppress q-switching in an optical amplifying device
    83.
    发明公开
    Device and method to suppress q-switching in an optical amplifying device 失效
    设备和方法,用于货物电路在光放大器器件的抑制

    公开(公告)号:EP0840469A2

    公开(公告)日:1998-05-06

    申请号:EP97118489.0

    申请日:1997-10-24

    IPC分类号: H04B10/24

    摘要: An improved four-port dichroic WDM, for use in a multiwavelength, bi-directional optical amplifier, having a dichroic filter for substantially reflecting a first wavelength band input to the WDM to an output of the WDM for the first wavelength band and for substantially transmitting a second wavelength band input to the WDM to an output of the WDM for the second wavelength band, in which some of a first 3dB wavelength in the first wavelength band is transmitted by the filter and some of a second 3 dB wavelength in the second wavelength band is reflected by the filter, includes another dichroic filter having a filter function different than the filter function of the WDM filter providing an insertion loss for the first or the second 3 dB wavelengths sufficient to reflect and transmit, respectively, substantially all of the first and second 3 dB wavelengths. Additional dichroic filters for suppressing 3 dB light are used to prevent Q-switching in an optical gain cavity in a multiwavelength, bi-directional optical amplifier formed by a reflection point in an optical path connected to the amplifier.

    摘要翻译: 一种改进的四端口分色WDM,一种用于在多波长双向光放大器使用,具有二向色滤光片基本上反射带输入到WDM的第一波长对WDM的输出为所述第一波长带以及用于基本上发射 的波长带输入的第二到WDM对WDM的第二波长带,其中一些在第一波长带中的第一3dB波长的反式由过滤器和mitted的输出一些中第二3dB波长的第二波长 带由滤光器反射,包括:具有比所述WDM滤光器的第一或第二3dB波长的充分提供插入损耗的滤波器函数的不同的滤波器函数分别以反射和透射,基本上所有的第一的另一二向色滤光片 和第二3dB波长。 用于抑制3分贝光附加分色滤光器是用来防止Q开关在光学增益腔中多波长,通过反射FORMED双向光放大器,连接到放大器的光路指向英寸

    Amplified telecommunication system for wavelength-division multiplexing transmissions capable of limiting variations in the output power
    86.
    发明公开
    Amplified telecommunication system for wavelength-division multiplexing transmissions capable of limiting variations in the output power 失效
    增强Telecommunikationssystem用于波长多路传输用补偿输出功率

    公开(公告)号:EP0695050A1

    公开(公告)日:1996-01-31

    申请号:EP95111505.4

    申请日:1995-07-21

    IPC分类号: H04B10/17 H01S3/06

    摘要: An optical telecommunication system comprising means (37, 38, 39, 40) for generating optical signals of different wavelengths, an optical-fibre line with amplifying means (45, 45', 45'', 45'''), a pre-amplifier (47), and receiving means (54, 55, 56, 57), wherein the pre-amplifier (47) comprises an optical waveguide (5,7,9) doped with a rare earth material, differential-attenuation means (8) located at a first position along the doped waveguide and capable of causing an attenuation in the signal band which is greater than the attenuation caused at the pumping wavelength, and filtering means (6) located at a second position and adapted to attenuate by a value higher than a predetermined minimum, the spontaneous emission in a wavelength band contiguous with the signal band. The position and attenuation of the differential-attenuation means and filtering means and the wavelength band are selected in a functional relation with respect to each other in order to limit the output power variations from the pre-amplifier.

    摘要翻译: 用于与放大装置(45,45“ 45' ”,45' ‘’),预生成不同波长的光信号,向光纤线路的光通信系统包括:装置(37,38,39,40) 放大器(47),和接收装置(54,55,56,57),其中,所述前置放大器(47)包括掺杂有稀土材料,差动衰减装置的光学波导(5,7,9)(8 位于)在沿搀杂的波导管的第一位置和能够在信号频带的所有比在泵波长引起的衰减更大曹景伟(衰减的和过滤位于装置6)在第二位置和angepasst由值来衰减 大于预定的最小更高,在一个波长带邻接于该信号带的自发发射。 差动衰减和滤波装置的装置和所述波长带的位置和衰减相对于彼此的函数关系,以限制从所述前置放大器的输出功率的变化选择。

    Optical amplifier and optical communication system provided with the optical amplifier
    88.
    发明公开
    Optical amplifier and optical communication system provided with the optical amplifier 失效
    OptischeVerstärkerund optischesÜbertragungssystemdamit。

    公开(公告)号:EP0675610A1

    公开(公告)日:1995-10-04

    申请号:EP95107617.3

    申请日:1990-08-31

    申请人: FUJITSU LIMITED

    发明人: Suyama, Masuo

    IPC分类号: H04B10/16

    摘要: An optical amplifier amplifying a received optical signal, comprising:

    a) a pumping light source emitting a pumping light beam;
    b) an optical fiber, doped with a rare earth element, having an input and an output;
    c) a first optical coupler for introducing a received optical signal and the pumping light beam to the input of said optical fiber;
    d) an optical receiver for receiving the received optical signal amplified resulting from propagation through the optical fiber and output from the output of said optical fiber; and,
    e) an optical isolator for preventing the received optical signal from propagating in a direction from said receiver to the output of said optical fiber; and
    An optical transmission system for transmitting an optical signal, comprising:

    a) a first terminal station for transmitting an optical signal to an optical fiber line;
    b) a second terminal station, having an optical receiver, for receiving the optical signal;
    c) an optical amplifier, optically connected to the optical fiber line, for amplifying the optical signal from the optical fiber, including,
       an rare earth element doped optical fiber having an input and an output;
       means for receiving the optical signal from the optical fiber line and for inputting the optical signal to the input of said rare earth element doped optical fiber;
       a pumping light source, optically coupled to either the input or the output of the rare earth element doped optical fiber, emitting a pumping light beam introduced to either the input or the output of the rare earth element doped optical fiber;
       means for inputting the optical signal amplified resulting from propagation through the optical fiber to the optical receiver and for preventing the the optical signal from propagating in a direction from said optical receiver to the output of said optical fiber.

    摘要翻译: 一种用于放大光信号的光放大器,包括掺杂有稀土元素的光纤(28; 54),其具有输入端的光信号和输出端; 以及发射被引入所述光纤的输入端或输出端的泵浦光束的泵浦光源(30; 68); 其中所述光信号通过所述光纤的传播被放大; 并且所述泵浦光源被提供用于输出监控信息。 此外,光传输系统包括光放大器和用于通过光传输线将光信号发送到光放大器的发射台(21; 50)。 此外,一种放大光信号的方法,包括从泵浦光源发射被引入到掺杂有稀土元素的光纤的输入端或输出端的泵浦光束的步骤; 以及从泵浦光源输出监视信息的步骤。

    Optische Übertragungseinrichtung für die Übertragung optischer Signale im Wellenlängenmultiplex auf einer Vielzahl benachbarter optischer Trägerwellenlängen
    89.
    发明公开
    Optische Übertragungseinrichtung für die Übertragung optischer Signale im Wellenlängenmultiplex auf einer Vielzahl benachbarter optischer Trägerwellenlängen 失效
    光传输装置,用于光信号的在波分复用上相邻光载波波长的多重传输。

    公开(公告)号:EP0590379A1

    公开(公告)日:1994-04-06

    申请号:EP93114514.8

    申请日:1993-09-09

    IPC分类号: H01S3/06 H04B10/16

    摘要: 2.1 Es soll eine optische Übertragungseinrichtung für die genannte Übertragung optischer Signale angegeben werden, mit der die durch nichtlineare Effekte verursachte Leistungsgrenze in Bezug auf den Datendurchsatz nach oben verschiebbar ist.
    2.2 Dazu wird eine optisch verstärkend wirkende dotierte Faser verwendet, in die Pumpstrahlung zum Pumpen einkoppelbar ist, wobei eine den Grad der optischen Verstärkung bestimmende Konzentration des Dotierstoffes in der Faser über der Länge der Faser ein derartiges Profil aufweist, daß ein Signalpegel der in die Faser eingekoppelten optischen Signale beim Durchgang durch die gepumpte Faser in wenigstens einer Übertragungsrichtung konstant bleibt oder zumindest einen im Vergleich zur ungepumpten Faser verminderten Abfall des Signalpegels aufweist.
    2.3 Anwendung für leistungsfähige Weitverkehrs-Übertragungsstrecken, Unterseekabel.

    摘要翻译: 2.1意图指定光传输装置上的光信号的传输所述,借助于该功率极限的所有其由非线性效应造成的向上可以相对于所述的数据吞吐量被移位。 2.2的掺杂光纤,其作用到光放大的方式用于此目的,在其中泵激辐射可以耦合用于泵送掺杂剂的浓度(光放大的哪确定性地雷的水平)的纤维,其超过的长度的轮廓 纤维搜索没有通过泵浦光纤通过期间,其耦合到所述光纤的光信号的信号电平保持在至少一个传输方向上恒定或至少具有在所述信号电平的下降的所有这是在比较与未泵浦减小 纤维。 2.3对于高功率中继线(远距离)的传输路径,水下电缆(海底电缆)的情况下使用。

    Optical fiber amplifier with filter
    90.
    发明公开
    Optical fiber amplifier with filter 失效
    FaseroptischerVerstärkermit Filter。

    公开(公告)号:EP0522201A1

    公开(公告)日:1993-01-13

    申请号:EP91121964.0

    申请日:1991-12-20

    摘要: Disclosed is a fiber amplifier system including a gain fiber having a single-mode core doped with active dopant ions capable of producing stimulated emission of light at wavelength λ s when pumped with light of wavelength λ p . Spliced to the gain fiber is a light-attenuating fiber having a core containing a dopant that attenuates light of wavelength λ p but not λ s . The amplifier is conventionally employed in a system including an incoming telecommunication fiber for introducing light of wavelength λ s into an end of the gain fiber, the amplified signal being connected to an outgoing telecommunication fiber. The system further includes a pump source for introducing light of wavelength λ p into an end of the gain fiber. Elements of the system can be arranged for forward pumping, counter pumping and dual ended pumping.
    Various interconnection schemes are disclosed for forming a series arrangement including the gain fiber, the attenuating fiber and the outgoing fiber.

    摘要翻译: 公开了一种光纤放大器系统,其包括具有掺杂有活性掺杂离子的单模芯的增益光纤,当用波长λp的光泵浦时,能够产生波长λs的受激发射的光。 与增益光纤接合的是一种光衰减光纤,其具有含有掺杂物的核,该掺杂剂衰减波长λp而不是λs的光。 放大器通常用于包括用于将波长λ的光引入增益光纤的端部的入射电信光纤的系统中,放大的信号连接到输出电信光纤。 该系统还包括用于将波长λp的光引入增益光纤的端部的泵浦源。 系统的元件可以布置用于正向泵送,反向泵送和双端泵浦。 公开了用于形成包括增益光纤,衰减光纤和输出光纤的串联装置的各种互连方案。