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    Wide-band erbium-doped fiber amplifier and wavelength division multiplexing optical transmission system
    21.
    发明公开
    Wide-band erbium-doped fiber amplifier and wavelength division multiplexing optical transmission system 审中-公开
    Breitbandiger铒光纤激光器和WDM-optischesÜbertragungssystem

    公开(公告)号：EP1351415A2

    公开(公告)日：2003-10-08

    申请号：EP03006194.9

    申请日：2003-03-19

    申请人： SAMSUNG ELECTRONICS CO., LTD.

    发明人： Hwang, Seong-Taek ,  Joo, Young-Hoon

    IPC分类号： H04B10/17 ,  H04B10/00

    CPC分类号： H04B10/291 ,  H01S3/067 ,  H04B2210/256 ,  H04B2210/258

    摘要： An erbium-doped fiber amplifier and a wavelength division multiplexing optical transmission system equipped with the same are disclosed. The wavelength division multiplexing optical transmission system includes a transmission stage having a first C/L fiber amplifier for amplifying combined C and L-band optical signals, an optical repeater having at least one second C/L fiber amplifier for amplifying the optical signals transmitted from a single mode fiber of a predetermined length, and a dispersion compensating fiber of a predetermined length for compensating dispersions of the amplified optical signals. The system also includes a reception stage having a third C/L fiber amplifier for amplifying the optical signals transmitted from a single mode fiber of a predetermined length, and a receiver for separating the amplified optical signals from the third C/L fiber amplifier into C-band optical signals and L-band optical signals band by band and de-multiplexing the separated amplified optical signals.

    摘要翻译： 公开了掺铒光纤放大器和配备其的波分复用光传输系统。 波分复用光传输系统包括具有用于放大组合C和L波段光信号的第一C / L光纤放大器的发射级，具有至少一个第二C / L光纤放大器的光中继器，用于放大从 预定长度的单模光纤和预定长度的色散补偿光纤，用于补偿放大的光信号的分散。 该系统还包括具有第三C / L光纤放大器的接收级，用于放大从预定长度的单模光纤传输的光信号，以及用于将放大的光信号与第三C / L光纤放大器分离成C 带式光信号和L波段光信号，并对分离的放大光信号进行解复用。

    Optical fiber communication system employing wavelength converter for broadband transmission
    23.
    发明公开
    Optical fiber communication system employing wavelength converter for broadband transmission 有权
    使用波长转换器用于Breitbandübertrangung光纤传输系统

    公开(公告)号：EP1076428A3

    公开(公告)日：2003-08-27

    申请号：EP00306497.9

    申请日：2000-07-31

    申请人： LUCENT TECHNOLOGIES INC.

    发明人： Ranka, Jinendra Kumar ,  Stentz, Andrew John

    IPC分类号： H04B10/17 ,  G02F2/00 ,  H04J14/02 ,  G02F1/35

    CPC分类号： H04B10/291 ,  G02F1/353 ,  G02F1/3536 ,  H04B2210/258

    摘要： The present invention uses wavelength conversion to increase the bandwidth of optical communication systems. In an exemplary embodiment, a combination of wavelength conversion and amplification with a discrete optical amplifier (OA) to allow communications systems to operate in wavelength bands λ' outside the gain bandwidth of the OA. A transmitter launches signal channels (λ 1 ', λ 2 ',...,λ' N ) that are outside the gain bandwidth λ. A wavelength conversion device upstream of the amplifier maps channels λ' 1 , λ' 2 ,...λ' N to corresponding wavelengths λ 1 , λ 2 , ...λ N within λ. The OA directly amplifies the converted signals and a second wavelength conversion device downstream of the amplifier maps the amplified signals back to the original channels λ' 1 , λ' 2 ,...λ' N . This increases the capacity of the optical communication systems by facilitating the use of both signals that lie within the OA gain bandwidth λ and signals that can be converted to wavelengths within λ. Associated wavelength converters, transmitters and receivers are also described. This approach applies not only to the use of EDFAs, but also to gain-flattening elements, dispersion-compensating fibers, variable attenuators, and any intermediate components having bandwidths smaller than the transmission fiber.

    Attenuation devices
    24.
    发明公开
    Attenuation devices 审中-公开
    Dämpfungsvorrichtungen

    公开(公告)号：EP1317089A2

    公开(公告)日：2003-06-04

    申请号：EP02257841.3

    申请日：2002-11-13

    申请人： Nortel Networks Limited

    发明人： Janssen, Adrian P.

    IPC分类号： H04J14/02 ,  G02B6/34

    CPC分类号： H04B10/25073 ,  G02B6/12021 ,  G02B6/266 ,  H04B2210/258 ,  H04J14/0221

    摘要： In one embodiment of the invention, an optical attenuation device has an input/output 6 on which a multiplexed optical input stream is received. A multiplexer/de-multiplexer (MUX/DEMUX) 2 separates the received stream into individual optical signals on individual channels and has an output/return path 12 from the MUX/DEMUX 2 for each of the channels. Reflector means 4 in each output/return path 12 reflects all or a proportion of the optical signal on the respective channel back along the output/return path 12 to the MUX/DEMUX 2. At the MUX/DEMUX, the optical signals are combined into a multiplexed stream which is output on the input/output 6. In an alternative embodiment, the device has first and second MUX/DEMUX 2, 20, an output path 12 from the first MUX/DEMUX 2, attenuation means 40 at the end of each output path 12 and return paths 120 from the attenuation means 40 to the second MUX/DEMUX 20. The attenuation means attenuates the optical signals on the respective channels, and the attenuated signals are combined into a multiplexed stream at the second MUX/DEMUX 20. Both embodiments achieve attenuation of multiplexed optical streams by attenuating the component optical signals of the stream in parallel.

    摘要翻译： 在本发明的一个实施例中，光衰减装置具有输入/输出6，多路复用光输入流被接收在该输入/输出6上。 多路复用器/去多路复用器（MUX / DEMUX）2将接收到的流分离成各个信道上的各个光信号，并且对于每个信道具有来自MUX / DEMUX 2的输出/返回路径12。 每个输出/返回路径12中的反射器装置4将相应通道上的光信号的全部或一部分沿着输出/返回路径12反射到MUX / DEMUX 2.在MUX / DEMUX处，光信号被组合成 在输入/输出6上输出的多路复用流。在替代实施例中，该装置具有第一和第二MUX / DEMUX2,20，来自第一MUX / DEMUX 2的输出路径12，在末端的衰减装置40 每个输出路径12和从衰减装置40到第二MUX / DEMUX 20的返回路径120.衰减装置衰减各个信道上的光信号，并且衰减的信号在第二MUX / DEMUX 20处被组合成多路复用流 两个实施例通过平行地衰减流的分量光信号来实现复用光流的衰减。

    Method and device for shaping the waveform of an optical signal
    25.
    发明公开
    Method and device for shaping the waveform of an optical signal 有权
    用于整形光信号的波形的方法和设备

    公开(公告)号：EP1271810A2

    公开(公告)日：2003-01-02

    申请号：EP01129298.4

    申请日：2001-12-13

    申请人： FUJITSU LIMITED

    发明人： Futami, Fumio ,  Watanabe, Shigeki

    IPC分类号： H04B10/17

    CPC分类号： H04B10/299 ,  H04B10/671 ,  H04B2210/258

    摘要： In the method according to the present invention, an optical signal is input into a first optical gate to suppress a space-level noise of the optical signal. Subsequently, an optical signal output from the first optical gate is input into a second optical gate to suppress a mark-level noise of the optical signal output from the first optical gate. With this configuration, the waveform of the optical signal can be shaped without O/E conversion. For example, waveform shaping independent of the modulation rate and format of the optical signal can be performed.

    摘要翻译： 在根据本发明的方法中，光信号被输入到第一光闸中以抑制光信号的空间电平噪声。 随后，从第一光闸输出的光信号被输入到第二光闸，以抑制从第一光闸输出的光信号的标记电平噪声。 利用这种配置，光信号的波形可以被整形而不需要O / E转换。 例如，可以执行与光信号的调制速率和格式无关的波形整形。

    Wavelength division multiplexed transmission path and dispersion-compensating fiber used therein
    28.
    发明公开
    Wavelength division multiplexed transmission path and dispersion-compensating fiber used therein 有权
    Üen n g g aser aser aser aser aser aser aser aser aser aser aser aser aser aser

    公开(公告)号：EP1241810A2

    公开(公告)日：2002-09-18

    申请号：EP02290605.1

    申请日：2002-03-11

    申请人： FUJIKURA LTD.

    发明人： Saitou, Manabu, c/o Fujikura Ltd.,Sakura Works ,  Aikawa, Kazuhiko, c/o Fujikura Ltd.,Sakura Works ,  Matsuo, Shoichiro, c/o Fujikura Ltd.,Sakura Works

    IPC分类号： H04B10/18

    CPC分类号： G02B6/02019 ,  G02B6/02261 ,  G02B6/02271 ,  G02B6/0228 ,  G02B6/03611 ,  G02B6/03644 ,  G02B6/29377 ,  H04B10/25253 ,  H04B2210/258

    摘要： In a wavelength division multiplexed transmission path, the used waveband can be selected from the widest possible waveband among the S-band, C-band, and L-band. The wavelength division multiplexed transmission path has a dispersion-compensating transmission path (5) comprising a dispersion-shifted fiber (1), which has positive chromatic dispersion throughout a range of wavelengths from 1460 nm to 1630 nm, and one type of dispersion-compensating fiber, or two or more types of dispersion-compensating fiber having different chromatic dispersion (2b, 3b, 4b) having negative chromatic dispersion in a compensation waveband, selected from the abovementioned range; the residual chromatic dispersion of the wavelength division multiplexed transmission path is adjusted so as to be greater than -1.0 ps/nm/km or equal to and less than or equal to +1.0 ps/nm/km in a used waveband of the wavelength division multiplexed transmission path, which is selected from the abovementioned range.

    摘要翻译： 在波分复用传输路径中，可以从S波段，C波段和L波段中的最宽波段中选择使用的波段。 波分复用传输路径具有包括色散位移光纤（1）的色散补偿传输路径（5），其在1460nm至1630nm的波长范围内具有正色散，并且一种类型的色散补偿 光纤或两种以上的色散补偿光纤，其具有从上述范围中选择的补偿波段中具有负色散的不同色散（2b，3b，4b）的色散补偿光纤; 将波分复用传输路径的残余色散调整为大于-1.0ps / nm / km或等于并且小于或等于+1.0ps / nm / km的波分复用波段 复用传输路径，其从上述范围中选择。