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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

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。

3. 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。

4. 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。

5. 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。

6. 发明授权

US06359728B1 Pump device for pumping an active fiber of an optical amplifier and corresponding optical amplifier 有权
标题翻译：用于泵浦光放大器和对应的光放大器的有源光纤的泵装置
公开(公告)号：US06359728B1
公开(公告)日：2002-03-19
申请号：US09400274
申请日：1999-09-21
申请人： Marco Angellieri , Roberta Castagnetti , Giovanni Sacchi
发明人： Marco Angellieri , Roberta Castagnetti , Giovanni Sacchi
IPC分类号： H01S300
CPC分类号： H01S3/06758 , H01S3/094011 , H01S2301/04
摘要： A pump device to couple a pump radiation to an active optical fiber adapted to amplify optical signals, includes a first optical coupler (150) that optically couples a first fraction of the pump radiation (145) to the active fiber (130) and has an insertion loss for the optical signals less than or equal to 0,2 dB; and a second optical coupler (160) that is optically coupled to the first coupler (150) to receive from the first coupler (150) a second fraction of the pump radiation, that is further optically coupled to the active fiber (130) for feeding to the active fiber (130) at least part of the second fraction of the pump radiation and that has a coupling efficiency for the pump radiation of at least 70%.
摘要翻译：将泵浦辐射耦合到适于放大光学信号的有源光纤的泵装置包括将泵浦辐射（145）的第一部分光学耦合到有源光纤（130）的第一光耦合器（150），并且具有光信号的插入损耗小于或等于0.2dB; 和光耦合到所述第一耦合器（150）以从所述第一耦合器（150）接收所述泵浦辐射的第二部分的第二光耦合器（160），其进一步光耦合到所述有源光纤（130）以供馈电到所述有源纤维（130）至少部分所述泵浦辐射的第二部分并且具有至少70％的泵浦辐射的耦合效率。

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