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1.发明授权Automatic raman gain and tilt control for ultra-long-distance dense WDM optical communication system 失效超长距离密集WDM光通信系统的自动拉曼增益和倾斜控制公开(公告)号：US06961522B1
公开(公告)日：2005-11-01
申请号：US09717036
申请日：2000-11-22
CPC分类号： H04B10/2931 , H04B10/2916 , H04J14/0221
摘要： An approach for automatic Raman gain and tilt control for a WDM (Wavelength Division Multiplexing) optical communication systems is disclosed. An optical fiber carries a plurality of optical signals, in which at least one of the optical signals are reference signals. An optical gain unit (e.g., Raman pump unit) couples to the optical fiber and adjusts the reference signals to compensate, in part, for losses associated with the optical fiber and gain tilt accumulation. Upon detecting and analyzing the reference signals, a controller controls the optical gain unit and outputs a control signal to the optical gain unit based upon the analyzed reference signals. An optical amplifier is connected to the optical fiber and amplifies the optical signals. The optical gain unit provides a nearly constant power per channel at an input of the optical amplifier. Under this approach, a Raman gain control mechanism, combined with the use of gain controlled EDFA (Erbium Doped Fiber Amplifier), allows high transmission capacity over ultra-long distances without optical regeneration and with high flexibility.
摘要翻译： 公开了一种用于WDM（波分复用）光通信系统的自动拉曼增益和倾斜控制的方法。 光纤携带多个光信号，其中至少一个光信号是参考信号。 光增益单元（例如，拉曼泵单元）耦合到光纤并且调整参考信号以部分地补偿与光纤相关联的损耗和增益倾斜积累。 在检测和分析参考信号时，控制器控制光学增益单元，并且基于分析的参考信号向光学增益单元输出控制信号。 光放大器连接到光纤并放大光信号。 光学增益单元在光放大器的输入处提供每通道几乎恒定的功率。 在这种方法下，拉曼增益控制机制与增益控制EDFA（掺铒光纤放大器）结合使用，可实现超长距离的高传输容量，无需光学再生和高灵活性。
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公开(公告)号：US06697193B1
公开(公告)日：2004-02-24
申请号：US09876533
申请日：2001-06-06
申请人： Fausto Meli , Roberta Castagnetti , Giorgio Grasso
发明人： Fausto Meli , Roberta Castagnetti , Giorgio Grasso
IPC分类号： H01S300
CPC分类号： H04B10/2942 , H04J14/0221
摘要： An amplification architecture for WDM receiver systems. The WDM channel grid is divided into groups of adjacent channels. A separate optical amplifier is provided for each channel with a single pump being shared among the channels of each group. The gain experienced by channels of a given group may be adjusted by varying the power of the group's pump. This approach allows equalization of received channel power such that all channels fall within the desired dynamic range. The amplification architecture may be implemented in a space-efficient manner at low cost.
摘要翻译： WDM接收机系统的放大架构。 WDM信道网格分为相邻信道组。 为每个通道提供单独的光放大器，每个通道的通道之间共享单个泵。 可以通过改变组的泵的功率来调整给定组的通道所获得的增益。 这种方法允许接收信道功率的均衡，使得所有信道落在所需的动态范围内。 放大架构可以以低成本的空间效率的方式来实现。
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公开(公告)号：US07006281B1
公开(公告)日：2006-02-28
申请号：US10757970
申请日：2004-01-14
申请人： Fausto Meli , Roberta Castagnetti , Giorgio Grasso
发明人： Fausto Meli , Roberta Castagnetti , Giorgio Grasso
IPC分类号： H01S3/00
CPC分类号： H04B10/2942 , H04J14/0221
摘要： An amplification architecture for WDM receiver systems. The WDM channel grid is divided into groups of adjacent channels. A separate optical amplifier is provided for each channel with a single pump being shared among the channels of each group. The gain experienced by channels of a given group may be adjusted by varying the power of the group's pump. This approach allows equalization of received channel power such that all channels fall within the desired dynamic range. The amplification architecture may be implemented in a space-efficient manner at low cost.
摘要翻译： WDM接收机系统的放大架构。 WDM信道网格分为相邻信道组。 为每个通道提供单独的光放大器，每个通道的通道之间共享单个泵。 可以通过改变组的泵的功率来调整给定组的通道所获得的增益。 这种方法允许接收信道功率的均衡，使得所有信道落在所需的动态范围内。 放大架构可以以低成本的空间效率的方式来实现。
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4.发明授权Suppression of double rayleigh backscattering and pump reuse in a raman amplifier 有权在拉曼放大器中抑制双重雷利反向散射和泵重新使用公开(公告)号：US06862132B1
公开(公告)日：2005-03-01
申请号：US09929738
申请日：2001-08-13
CPC分类号： H01S3/302 , H01S3/094015 , H01S3/094096 , H01S2301/02
摘要： Systems and methods for ameliorating double Rayleigh backscattering induced impairments are provided. Raman amplification is divided among two or more stages. Optical energy from a single counter-propagating pump may traverse multiple stages while optical energy at the frequency of the signal to be amplified is permitted to propagate in the forward direction only. In this way the pump power can be effectively distributed over the entire amplifier length. The scheme may be implemented in a simple configuration employing a closed circulator and a fiber Bragg grating. Multiple wavelength pump operation may be accommodated as well as either discrete or distributed Raman amplification.
摘要翻译： 提供了改善双瑞利后向散射诱发损伤的系统和方法。 拉曼放大分为两个或多个阶段。 来自单个反向传播泵的光能可以横越多个阶段，而被放大的信号的频率的光能仅允许沿正向传播。 以这种方式，泵功率可以在整个放大器长度上有效分布。 该方案可以采用采用封闭循环器和光纤布拉格光栅的简单配置来实现。 可以适应多波长泵操作以及离散或分布式拉曼放大。
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5.发明授权
公开(公告)号：US5943151A
公开(公告)日：1999-08-24
申请号：US807240
申请日：1997-02-28
申请人： Giorgio Grasso , Fausto Meli
发明人： Giorgio Grasso , Fausto Meli
IPC分类号： G02B6/34 , H04B10/2519 , H04B10/00
CPC分类号： G02B6/4246 , G02B6/12007 , G02B6/2932 , G02B6/29394 , H04B10/2519
摘要： A method of selectively compensating for the chromatic dispersion of optical signals in an optical telecommunication network, comprising the steps of transmitting at least two signals over a common portion of said network, separating at least one of the signals from the remaining signals at at least one point of the network, compensating for the chromatic dispersion of this signal and recombining said signal with the remaining signals at said one point of the network. Preferably this method further comprises the steps of detecting the chromatic dispersion of each of the signals at at least one point of the network, identifying, among the signals, the signals to be compensated, for which the detected dispersion value does not fall within a range of predetermined values and compensating for the dispersion of said signals so as to make them fall within this range of predetermined values.
摘要翻译： 一种选择性地补偿光通信网络中的光信号的色散的方法，包括以下步骤：在所述网络的公共部分上传送至少两个信号，将至少一个信号与剩余的信号分开至少一个 以补偿该信号的色散，并将所述信号与网络的所述一个点处的剩余信号重新组合。 优选地，该方法还包括以下步骤：在网络的至少一个点处检测每个信号的色散，在信号中识别要被补偿的信号，其中检测到的色散值不在范围内 并补偿所述信号的色散，使其落入该预定值的范围内。
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公开(公告)号：US06288810B1
公开(公告)日：2001-09-11
申请号：US09202270
申请日：1999-05-07
IPC分类号： H04J1402
CPC分类号： H04J14/0209 , H04J14/0206 , H04J14/0212 , H04J14/0213 , H04J14/0216 , H04J14/0221
摘要： A multi-channel optical telecommunication system and method for transmitting optical signals having distinct wavelengths. Spectral selection is provided for the optical signals to add or drop signals of predetermined wavelengths. The signals are divided into at least two series of different wavelengths. The signals of each series are dropped or signals of corresponding wavelengths are added, and the signals are then combined.
摘要翻译： 一种用于发送具有不同波长的光信号的多声道光通信系统和方法。 为光信号提供光谱选择以添加或丢弃预定波长的信号。 信号被分成至少两个不同波长的系列。 每个系列的信号被丢弃或相应波长的信号相加，然后信号被组合。
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7.发明授权
公开(公告)号：US5946117A
公开(公告)日：1999-08-31
申请号：US569655
申请日：1995-12-08
申请人： Fausto Meli , Giorgio Grasso
发明人： Fausto Meli , Giorgio Grasso
CPC分类号： H04B10/2525 , H04B10/25077 , H04B10/25253 , H04B10/2563
摘要： An optical telecommunication system has at least two sources of optical modulated signals at different wavelengths in a predetermined transmission wavelength band, together with a multiplexer for the signals, an optical fibre line connected at one end to the multiplexer, and a demultiplexer/receiver for the signals. The line comprises an optical fibre having a chromatic dispersion value lower than a predetermined value in the transmission wavelength band and increasing as wavelength increases. The fibre also has a zero value of chromatic dispersion at a wavelength lower than the minimum wavelength of the transmission wavelength band by such an amount that no local wavelength zero value of the chromatic dispersion present in the fibre and capable of generating a four-wave-mixing phenomenon is included in the band.
摘要翻译： 光通信系统在预定的传输波长带中具有不同波长的至少两个光调制信号源，以及用于信号的多路复用器，一端连接到多路复用器的光纤线路和用于该多路复用器的解复用器/接收器 信号。 该线包括在透射波长带中具有低于预定值的色散值的光纤，并且随着波长的增加而增加。 该光纤在波长比发送波长带的最小波长低的波长处具有零色散值，使得光纤中不存在色散的局部波长零值并且能够产生四波 - 混合现象包括在乐队中。
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公开(公告)号：US06437888B1
公开(公告)日：2002-08-20
申请号：US09900185
申请日：2001-07-09
IPC分类号： H04J1402
CPC分类号： H04J14/0209 , H04J14/0206 , H04J14/0212 , H04J14/0213 , H04J14/0216 , H04J14/0221
摘要： Device for adding/dropping optical signals into/from an optical transmission path, including input means for at least two optical signals with distinct wavelengths, comprising spectral selection means for sending at least a first signal to a first optical path and at least a second signal to a second optical path, at least a wavelength selective switching means along at least one of said first and second optical paths, for adding and dropping at least one optical signal having a predetermined wavelength selected from the optical signal wavelengths.
摘要翻译： 用于将光信号添加到/从光传输路径中的装置，包括用于具有不同波长的至少两个光信号的输入装置，包括用于将至少第一信号发送到第一光路和至少第二信号的光谱选择装置 至少沿着所述第一和第二光路中的至少一个的波长选择性切换装置，用于添加和丢弃具有从光信号波长选择的预定波长的至少一个光信号。
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公开(公告)号：US5809196A
公开(公告)日：1998-09-15
申请号：US768129
申请日：1996-12-17
申请人： Fausto Meli , Giorgio Grasso
发明人： Fausto Meli , Giorgio Grasso
CPC分类号： G02B6/02271 , G02B6/0228 , H04B10/2525 , H04B10/2563 , G02B6/03611 , G02B6/03688
摘要： An optical telecommunication system has at least two sources of optical modulated signals at different wavelengths in a predetermined transmission wavelength band, together with a multiplexer for the signals, an optical fiber line connected at one end to the multiplexer, and a demultiplexer/receiver for the signals. The line comprises an optical fiber having a chromatic dispersion value lower than a predetermined value in the transmission wavelength band and increasing as wavelength increases. The fiber also has a zero value of chromatic dispersion at a wavelength lower than the minimum wavelength of the transmission wavelength band by such an amount that no local wavelength zero value of the chromatic dispersion present in the fiber and capable of generating a four-wave-mixing phenomenon is included in the band.
摘要翻译： 光通信系统在预定的传输波长带中具有不同波长的至少两个光调制信号源，以及用于信号的多路复用器，一端连接到多路复用器的光纤线路和用于该多路复用器的解复用器/接收器 信号。 该线包括在透射波长带中具有低于预定值的色散值的光纤，并且随着波长的增加而增加。 该光纤在波长比发送波长带的最小波长低的波长处具有零色散值，使得光纤中不存在色散的局部波长零值并且能够产生四波 - 混合现象包括在乐队中。
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10.发明授权Optical power amplifier with Al.sub.2 O.sub.3 and erbium doped active fiber 失效具有Al2O3和掺铒有源光纤的光功率放大器
公开(公告)号：US5638204A
公开(公告)日：1997-06-10
申请号：US156880
申请日：1993-11-23
申请人： Giorgio Grasso , Aldo Righetti , Fausto Meli
发明人： Giorgio Grasso , Aldo Righetti , Fausto Meli
CPC分类号： H01S3/06708 , H01S3/094011 , H01S3/1693
摘要： An optical fiber power amplifier, particularly for telecommunication lines with optical fibers, including an active fiber doped with Erbium as a fluorescing substance, and with Al.sub.2 O.sub.3 as refraction index modifying dopant. The fiber is pumped with a laser providing a wavelength higher than 520 nm and preferably, 980 nm. The amplifier has a particularly high amplification efficiency close to the theoretical maximum efficiency.
摘要翻译： 一种光纤功率放大器，特别是用于具有光纤的电信线路，包括掺杂有铒作为荧光物质的有源光纤，以及Al 2 O 3作为折射率修饰掺杂剂。 纤维用提供高于520nm，优选980nm的波长的激光器泵送。 该放大器具有接近理论最大效率的特别高的放大效率。
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