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    • 1. 发明公开
    • Multiplexer with additional optical filtering
    • Multiplexer mitzusätzlicheroptischer Filterung
    • EP2117148A1
    • 2009-11-11
    • EP08155322.4
    • 2008-04-29
    • LUCENT TECHNOLOGIES INC.
    • Raddatz, LutzLiu, XiangSethumadhavan, Chandrasekhar
    • H04J14/02
    • G02B6/29382H04J14/0204H04J14/0206H04J14/0212
    • The invention relates to on optical network element (20a) for multiplexing single wavelength optical signals, the optical network element (20a) comprising: at least one input interface (201) for an input optical wavelength division multiplexed signal; at least one output interface (202) for an output optical wavelength division multiplexed signal; at least one tributary interface (203, 204) forgot least one single wavelength optical signal to be added to a pass-through optical wavelength division multiplexed signal or to be dropped from the input optical wavelength division multiplexed signal; and at least one wavelength selective element (207) connecting the tributary interface (203, 204) with the input interface (201) or the output interface (202), wherein the optical network element (20a) further comprises of least one optical filtering element (208) with a filter bandwidth which is narrower than the filler bandwidth of the wavelength selective element (207), The invention further relates to a wavelength division multiplexing optical communication system (1b) and to a method for multiplexing single wavelength optical signals in a wavelength division multiplexing optical communication system (1b).
    • 本发明涉及用于复用单波长光信号的光网元件(20a),该光网元件(20a)包括:用于输入光波分复用信号的至少一个输入接口(201) 用于输出光波分复用信号的至少一个输出接口(202); 至少一个支路接口(203,204)忘记要添加到直通光波分复用信号中的最少一个单波长光信号或从输入光波分复用信号中丢弃; 以及连接所述支路接口(203,204)与所述输入接口(201)或所述输出接口(202)的至少一个波长选择元件(207),其中所述光网络元件(20a)还包括至少一个光学滤波元件 (208),其滤波器带宽比波长选择元件(207)的填充带宽窄。本发明还涉及一种波分复用光通信系统(1b)和一种用于将单波长光信号复用于 波分复用光通信系统(1b)。
    • 8. 发明公开
    • Optical add/drop multiplexer having a banded channel configuration
    • Optischer Add / Drop-Multiplexer mitbändigerKanalkonfiguration
    • EP1608097A2
    • 2005-12-21
    • EP05253423.7
    • 2005-06-03
    • LUCENT TECHNOLOGIES INC.
    • Fishman, Daniel A.Liu, XiangSilverio, Vincent JohnThompson, William A.Ying, Jinpin
    • H04J14/02G02B6/34
    • H04J14/0221H04J14/0204H04J14/0205H04J14/0208H04J14/0213H04J14/0219
    • An optical add/drop multiplexer (OADM) adapted to route optical signals having at least two different bit rates. The OADM has at least two sets of DWDM channels, e.g., with channels in a first set having a first bandwidth value suitable for the transmission of 10-Gb/s signals and channels in a second set having a second bandwidth value suitable for the transmission of 40-Gb/s signals. The first and second sets occupy two different spectral bands and the first set has two subsets of interleaved channels. In one embodiment, the OADM has first and second optical branches adapted to process optical signals corresponding to first and second groups of channels, respectively. The first group includes a first subset from the first set while the second group includes the second set and a second subset from the first set. Advantageously, OADMs of the invention may be used to create independent processing paths for different groups of channels. As a result, a communication system having those OADMs can be upgraded, e.g., to add a new 40-Gb/s service and/or to populate additional 10-Gb/s channels substantially without interrupting the 10-Gb/s service already in place.
    • 适于路由具有至少两个不同比特率的光信号的光分插复用器(OADM)。 OADM具有至少两组DWDM信道,例如,具有适合于传输10Gb / s信号的第一带宽值的信道和具有适合于传输的第二带宽值的第二集合中的信道的至少两组DWDM信道 的40 Gb / s信号。 第一组和第二组占用两个不同的频谱带,第一组具有两个交织信道子集。 在一个实施例中,OADM具有分别适于处理对应于第一和第二组信道的光信号的第一和第二光分支。 第一组包括来自第一组的第一子集,而第二组包括第二组,而第二组包括第一组。 有利地,本发明的OADM可以用于为不同的信道组创建独立的处理路径。 因此,可以升级具有这些OADM的通信系统,例如,为了增加新的40Gb / s服务和/或基本上添加10Gb / s信道,而不会中断10Gb / s的服务 地点。
    • 10. 发明公开
    • System and method for alternate mark inversion and duobinary optical transmission
    • 交替markinvertierenden和双二进制光传输的方法和装置
    • EP1482662A1
    • 2004-12-01
    • EP04252937.0
    • 2004-05-18
    • LUCENT TECHNOLOGIES INC.
    • Leuthold, JuergLiu, XiangWei, Xing
    • H04B10/155
    • H04B10/516H04B10/505H04B10/5051H04B10/5167H04B2210/517
    • An optical transmitter is disclosed including a laser source, a modulator for generating a differential phase shift keyed signal, and a delay interferometer having at least one optical input and at least one optical output. The delay interferometer is adapted to provide a time delay of about one bit period. Also disclosed is a method of transmitting alternate mark inversion and/or duobinary signals. The method includes the steps of providing a differential phase shift keyed signal, inputting the differential phase shift keyed signal into a delay device adapted to split the differential phase shift keyed signal into at least two signals on at least two arms and to delay the signal on at least one arm by about one bit period, and coherently combining the signals on the arms to produce alternate mark inversion and/or duobinary signals.
    • 发射器具有差分编码器(10)和马赫 - 曾德尔调制器(20),用于产生差分相移键控信号。 的光学延迟干涉计(30),拆分差分相移键控信号转换成两个臂(35,36),并提供了有关一个位周期的时间延迟。 该延迟干涉仪在交替反转和双二进制信号键控信号的差分相移转换。 因此独立权利要求中包括了以下内容:(a)至光传输系统,包括光发射器的(b)发送交替反转和双二进制信号的方法。