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1. 发明授权

US06961522B1 Automatic raman gain and tilt control for ultra-long-distance dense WDM optical communication system 失效
标题翻译：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
申请人： Roberta Castagnetti , Fabrizio Di Pasquale , Giorgio Grasso , Fausto Meli , Giovanni Sacchi
发明人： Roberta Castagnetti , Fabrizio Di Pasquale , Giorgio Grasso , Fausto Meli , Giovanni Sacchi
IPC分类号： H04B10/00 , H04B10/17 , H04J14/02
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。

2. 发明授权

US06657777B1 Interleaved lumped raman amplifier structure based on highly nonlinear fibers for densely spaced WDM channels 有权
标题翻译：基于高度非线性光纤的交错集中拉曼放大器结构，用于密集间隔的WDM通道
公开(公告)号：US06657777B1
公开(公告)日：2003-12-02
申请号：US10006741
申请日：2001-12-05
申请人： Fausto Meli , Fabrizio Di Pasquale , Giovanni Sacchi
发明人： Fausto Meli , Fabrizio Di Pasquale , Giovanni Sacchi
IPC分类号： H04J1402
CPC分类号： H04B10/2916 , H01S3/06708 , H01S3/2383 , H01S3/302
摘要： A modular interleaved Raman amplifier structure is exploited to reap the advantages provided by the high Raman gain coefficient and small effective area of highly nonlinear fibers without incurring penalties caused by nonlinear effects and double-Rayleigh backscattering noise. Very tight WDM channel spacings may be accommodated. The amplifier structure may be implemented at very low initial cost and with high reliability, scalability, and modularity.
摘要翻译：利用模块交错拉曼放大器结构，可以获得高拉曼增益系数和高非线性光纤有效面积的优势，而不会产生由非线性效应和双瑞利后向散射噪声引起的惩罚。可能容纳非常紧密的WDM通道间隔。放大器结构可以以非常低的初始成本和高可靠性，可扩展性和模块化来实现。

3. 发明授权

US06621626B1 Modular optical amplifier structure for highly dense interleaved WDM systems 有权
标题翻译：用于高密度交错WDM系统的模块化光放大器结构
公开(公告)号：US06621626B1
公开(公告)日：2003-09-16
申请号：US10010015
申请日：2001-12-05
申请人： Fausto Meli , Fabrizio Di Pasquale , Giovanni Sacchi
发明人： Fausto Meli , Fabrizio Di Pasquale , Giovanni Sacchi
IPC分类号： H01S300
CPC分类号： H04B10/294 , H04B2210/258
摘要： An advantageous amplification architecture for DWDM systems including systems with very high capacity is provided. A modular interleaved structure for amplification is provided. Advantages include robustness to non-linear effects, modular as-needed deployment of system capacity, and low noise figure in implementations that incorporate Raman amplification technology.
摘要翻译：提供了包括具有非常高容量的系统的DWDM系统的有利的放大架构。提供了用于放大的模块化交错结构。优点包括对非线性效应的鲁棒性，系统容量的模块化的必要部署以及结合拉曼放大技术的实现中的低噪声系数。

4. 发明授权

US06556346B1 Optical amplifying unit and optical transmission system 失效
标题翻译：光放大单元和光传输系统
公开(公告)号：US06556346B1
公开(公告)日：2003-04-29
申请号：US09400275
申请日：1999-09-21
申请人： Fabrizio Di Pasquale , Fausto Meli , Giovanni Sacchi , Silvia Turolla
发明人： Fabrizio Di Pasquale , Fausto Meli , Giovanni Sacchi , Silvia Turolla
IPC分类号： H01S300
CPC分类号： H04B10/291 , G02B6/03633 , H01S3/06716 , H01S3/06758 , H01S3/0677 , H01S3/1003 , H01S3/1608 , H01S3/1618 , H01S2301/04
摘要： An optical amplifying unit (100; 100′) for amplifying optical signals in an optical transmission system has an amplification wavelength band with a lower wavelength limit greater than 1570 nm and includes an input (101) for the input of optical signals, an output (102) for the output of optical signals and an optical amplifier (104) interposed between the input (101) and the output (102) to amplify the optical signals. The optical amplifier (104) includes an amplification fiber (108) co-doped with erbium and ytterbium, at least a pump source (109, 110) to generate pump radiation and at least an optical coupler (111, 112) optically coupling the pump sources (109, 110) to the amplification fiber (108). The optical amplifying unit has a power gain of at least 31 dB when the optical signals have an input power of at least −10.5 dBm and wavelengths within the amplification wavelength band.
摘要翻译：用于在光传输系统中放大光信号的光放大单元（100; 100'）具有大于1570nm的较低波长极限的放大波段，并包括用于输入光信号的输入（101），输出（ 102）和插入在输入（101）和输出（102）之间的光放大器（104）以放大光信号。光放大器（104）包括与铒和镱共掺杂的放大光纤（108），至少一个泵浦源（109,110）以产生泵浦辐射，并且至少一个光耦合器（111,112）将泵源（109,110）到放大光纤（108）。当光信号具有至少-10.5dBm的输入功率和放大波段内的波长时，光放大单元具有至少31dB的功率增益。

5. 发明授权

US06697193B1 Shared variable gain amplifier for WDM channel equalization 有权
标题翻译：用于WDM信道均衡的共享可变增益放大器
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。

6. 发明授权

US07006281B1 Shared variable gain amplifier for WDM channel equalization 有权
标题翻译：用于WDM信道均衡的共享可变增益放大器
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。

7. 发明授权

US06646786B1 Copropagating Raman pump unit to suppress four-wave mixing crosstalk between pump modes and WDM signals 有权
标题翻译：用于抑制泵浦模式和WDM信号之间的四波混频串扰的大浪拉曼泵单元
公开(公告)号：US06646786B1
公开(公告)日：2003-11-11
申请号：US10139467
申请日：2002-05-06
申请人： Fausto Meli , Fabrizio Di Pasquale
发明人： Fausto Meli , Fabrizio Di Pasquale
IPC分类号： H01S300
CPC分类号： H04B10/2916 , H01S3/302 , H04B10/2563
摘要： Four-wave mixing crosstalk between co-propagating Raman amplification pump sources and WDM channels is suppressed. Therefore, co-propagating pumping may be applied to Raman amplification without incurring penalties due to four-wave mixing crosstalk. Pump power need not be substantially increased to accommodate use of the present invention. Also, the use of lower cost Fabry-Perot pump sources is facilitated. In one implementation, the advantageous suppression of four-wave mixing crosstalk between pump signals and WDM channels is accomplished by imposing chromatic dispersion on the co-propagating pump sources.
摘要翻译：共传播拉曼放大泵浦源和WDM通道之间的四波混频串扰被抑制。因此，可以将共传播泵送到拉曼放大，而不会由于四波混频串扰而引起惩罚。泵功率不需要大幅增加以适应本发明的使用。此外，更便宜的使用较低成本的法布里 - 珀罗泵浦源。在一个实现中，通过在共同传播的泵浦源上施加色散来实现对泵浦信号和WDM信道之间的四波混频串扰的有利抑制。

8. 发明授权

US07692850B1 Lumped-Raman amplification structure for very wideband applications 有权
标题翻译：用于非常宽带应用的集中拉曼放大结构
公开(公告)号：US07692850B1
公开(公告)日：2010-04-06
申请号：US12400470
申请日：2009-03-09
申请人： Fausto Meli , Rosanna Pastorelli , Roberta Castagnetti
发明人： Fausto Meli , Rosanna Pastorelli , Roberta Castagnetti
IPC分类号： H04B10/17 , H04B10/12
CPC分类号： H04B10/2916 , H01S3/06758 , H01S3/06766 , H01S3/0677 , H01S3/094015 , H01S3/094096 , H01S3/302 , H01S2301/04
摘要： Improved lumped Raman amplification systems are disclosed. A lumped Raman amplification structure provides optimized efficiency, low noise figure over a range of gain settings, and a high saturation threshold. Responsibility for amplifying different portions of the spectrum is divided among multiple stages. In one particular implementation, two outer stages amplify a first band and two inner stages amplify a second band. The two inner stages also apply a small amount of amplification to the first band. A modification improves noise figure in the second band by adding some amplification in the second band to the first stage.
摘要翻译：公开了改进的集总拉曼放大系统。集中拉曼放大结构提供优化的效率，在一定范围的增益设置下的低噪声系数和高饱和阈值。放大光谱不同部分的责任分为多个阶段。在一个具体实现中，两个外部级放大第一频带，两个内部级放大第二频带。两个内部阶段也对第一个波段施加少量的放大。修改通过将第二频带中的一些放大增加到第一级来改善第二频带中的噪声系数。

9. 发明授权

US07054059B1 Lumped Raman amplification structure for very wideband applications 有权
标题翻译：用于非常宽带应用的集中拉曼放大结构
公开(公告)号：US07054059B1
公开(公告)日：2006-05-30
申请号：US10437496
申请日：2003-05-14
申请人： Fausto Meli , Rosanna Pastorelli , Roberta Castagnetti
发明人： Fausto Meli , Rosanna Pastorelli , Roberta Castagnetti
IPC分类号： H04B10/12
CPC分类号： H04B10/2916 , H01S3/06758 , H01S3/06766 , H01S3/0677 , H01S3/094015 , H01S3/094096 , H01S3/302 , H01S2301/04
摘要： Improved lumped Raman amplification systems are disclosed. A lumped Raman amplification structure provides optimized efficiency, low noise figure over a range of gain settings, and a high saturation threshold. Responsibility for amplifying different portions of the spectrum is divided among multiple stages. In one particular implementation, two outer stages amplify a first band and two inner stages amplify a second band. The two inner stages also apply a small amount of amplification to the first band. A modification improves noise figure in the second band by adding some amplification in the second band to the first stage.
摘要翻译：公开了改进的集总拉曼放大系统。集中拉曼放大结构提供优化的效率，在一定范围的增益设置下的低噪声系数和高饱和阈值。放大光谱不同部分的责任分为多个阶段。在一个具体实现中，两个外部级放大第一频带，两个内部级放大第二频带。两个内部阶段也对第一个波段施加少量的放大。修改通过将第二频带中的一些放大增加到第一级来改善第二频带中的噪声系数。

10. 发明授权

US5943151A Mehtod of selectively compensating for the chromatic dispersion of optical signals 失效
标题翻译：选择性地补偿光信号的色散
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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