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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

US07417790B2 Looped optical network with ASE light recirculation and link and network survivability control system 失效
标题翻译：环光光网络采用ASE光循环和链路和网络生存性控制系统
公开(公告)号：US07417790B2
公开(公告)日：2008-08-26
申请号：US10571506
申请日：2004-09-10
申请人： Antonella Bogoni , Giovanni Sacchi , Antonio D'Errico , Fabrizio Di Pasquale
发明人： Antonella Bogoni , Giovanni Sacchi , Antonio D'Errico , Fabrizio Di Pasquale
IPC分类号： H01S3/00
CPC分类号： H04B10/27 , H04B10/275
摘要： A looped WDM optical network comprises an optical loop with optical amplifiers (12,16) between the sections of the loop (11) and with ASE recirculation in the loop. At a point of the loop a laser beam is injected and allowed to circulate in the loop with the laser beam being centered around a λLINK wavelength where it is desired that a lasing peak be generated. This supplies high network strength in terms of section loss variations and greatly improves the OSNR of the WDM signal. High network survivability is also achievable.
摘要翻译：环路WDM光网络包括在环路（11）的部分之间的光放大器（12,16）和环路中的ASE再循环的光环路。在循环的一个点，激光束被注入并允许在环路中循环，激光束以波长为中心的波长为中心，期望产生激光峰。这在节段损耗变化方面提供了很高的网络强度，并大大提高了WDM信号的OSNR。高网络生存性也是可以实现的。

6. 发明授权

US06437906B1 All-optical gain controlled L-band EDFA structure with reduced four-wave mixing cross-talk 有权
标题翻译：全光增益控制L波段EDFA结构，减少了四波混频串扰
公开(公告)号：US06437906B1
公开(公告)日：2002-08-20
申请号：US09717005
申请日：2000-11-22
申请人： Fabrizio Di Pasquale , Giovanni Sacchi , Alberto Zermani , Silvia Turolla
发明人： Fabrizio Di Pasquale , Giovanni Sacchi , Alberto Zermani , Silvia Turolla
IPC分类号： H01S300
CPC分类号： H01S3/06754 , H01S3/06716 , H01S3/094011 , H01S3/102 , H01S3/1608 , H01S2301/02
摘要： An approach for minimizing four-wave mixing (FWM) cross-talk (XT) in a WDM (wavelength division multiplexing) optical communication system is disclosed. An Erbium doped Fiber Amplifier (EDFA) includes a pre-amplifier that receives an input optical signal and outputs an amplified input optical signal. The pre-amplifier includes the following components: a first active fiber that carries WDM signals corresponding to a particular operating band (e.g., L-band); a co-propagating pump laser that induces high inversion in a portion of the first active fiber; a filter that is coupled to the first active fiber and slightly inverts the gain tilt of the WDM signals and suppresses the amplified spontaneous emission (ASE) lights accumulated at wavelengths shorter than the signal bandwidth; a second active fiber that is coupled to the filter; and a counter-propagating pump laser that induces high inversion in a portion of the second active fiber. An optical unit (e.g., an optical add/drop module, a gain equalizing filter (GEF), or a dispersion compensating fiber (DCF)) may be coupled to the pre-amplifier and receives the amplified input signal, in which the optical unit introduces a prescribed loss to the WDM system. A booster amplifier is coupled to the optical unit and is configured to amplify a signal that is output from the optical unit. An automatic optical gain control (AOGC) mechanism of the EDFA provides nearly constant gain that is independent of the number of channels utilized in the WDM system and also minimizes system penalties due to fast relaxation oscillations induced by adding/dropping of channels.
摘要翻译：公开了一种在WDM（波分复用）光通信系统中最小化四波混频（FWM）串扰（XT）的方法。掺铒光纤放大器（EDFA）包括前置放大器，其接收输入光信号并输出放大的输入光信号。前置放大器包括以下组件：承载对应于特定工作频带（例如，L频带）的WDM信号的第一有源光纤; 共同传播的泵激光器，其在第一有源光纤的一部分中引起高反转; 滤波器，耦合到第一有源光纤并稍微反转WDM信号的增益倾斜，并抑制在比信号带宽短的波长处累积的放大的自发发射（ASE）光; 耦合到所述滤波器的第二有源光纤; 以及在第二有源光纤的一部分中引起高反转的反向传播泵激光器。光学单元（例如，光学分插模块，增益均衡滤波器（GEF）或色散补偿光纤（DCF））可以耦合到前置放大器并接收放大的输入信号，其中光学单元向WDM系统引入规定的损失。升压放大器耦合到光学单元，并被配置为放大从光学单元输出的信号。 EDFA的自动光增益控制（AOGC）机制提供几乎恒定的增益，独立于WDM系统中使用的信道数量，并且还可以最大限度地减少因加入/丢弃通道引起的快速弛豫振荡引起的系统惩罚。

7. 发明申请

US20080297883A1 Raman Amplifier Structure 审中-公开
标题翻译：拉曼放大器结构
公开(公告)号：US20080297883A1
公开(公告)日：2008-12-04
申请号：US11996354
申请日：2006-07-11
申请人： Stefano Faralli , Gabriele Bolognini , Giovanni Sacchi , Fabrizio Di Pasquale
发明人： Stefano Faralli , Gabriele Bolognini , Giovanni Sacchi , Fabrizio Di Pasquale
IPC分类号： H01S3/30
CPC分类号： H04B10/2916 , H01S3/06754 , H01S3/094046 , H01S3/094073 , H01S3/094096 , H01S3/302 , H01S5/12 , H01S5/146
摘要： A Raman amplifier structure (121, 221) for optically amplifying an input optical signal comprises an optical means (22) through which the optical signal is propagated, a first pump optical source (10) for generating a first pump radiation and at least one second pump optical source (24, 27) for generating a second pump radiation. The first and second pump optical radiations are combined and propagated in optical transmission means (22) for supplying an optical amplification of the signal through the Raman effect. The first pump optical source (10) comprises a first laser source (12) for generating a radiation with relatively low noise and relatively low power and a Raman amplifier (13) for amplifying the radiation coming from the first laser source for generating the first pump radiation. The Raman amplifier (13) comprises a second laser source (14) for generating an optical radiation having relatively higher power and noise than the first laser source and the radiation coming from the second laser source is used for counter-pumping the radiation coming from the first laser source (12) for generating the first pump radiation. This limits the amount of noise transferred from the second source (14) to the first pump radiation.
摘要翻译：用于光学放大输入光信号的拉曼放大器结构（121,221）包括光学信号传播的光学装置（22），用于产生第一泵浦辐射的第一泵浦光源（10）和至少一个第二泵浦光源（24,27），用于产生第二泵浦辐射。第一和第二泵浦光辐射在光传输装置（22）中组合和传播，用于通过拉曼效应提供信号的光放大。第一泵浦光源（10）包括用于产生具有相对较低噪声和相对较低功率的辐射的第一激光源（12）和用于放大来自第一激光源的辐射的拉曼放大器（13），用于产生第一泵辐射。拉曼放大器（13）包括用于产生具有比第一激光源相对更高的功率和噪声的光辐射的第二激光源（14），并且来自第二激光源的辐射用于反向泵浦来自用于产生第一泵浦辐射的第一激光源（12）。这限制了从第二源（14）传递到第一泵辐射的噪声量。

8. 发明申请

US20070064305A1 Looped optical network with ase light recirculation and link and network survivability control system 失效
标题翻译：环路光网络与光再循环和链路和网络生存性控制系统
公开(公告)号：US20070064305A1
公开(公告)日：2007-03-22
申请号：US10571506
申请日：2004-09-10
申请人： Antonella Bogoni , Giovanni Sacchi , Antonio D'Errico , Fabrizio Di Pasquale
发明人： Antonella Bogoni , Giovanni Sacchi , Antonio D'Errico , Fabrizio Di Pasquale
IPC分类号： H01S3/00
CPC分类号： H04B10/27 , H04B10/275
摘要： A looped WDM optical network comprises an optical loop with optical amplifiers (12,16) between the sections of the loop (11) and with ASE recirculation in the loop. At a point of the loop a laser beam is injected and allowed to circulate in the loop with the laser beam being centered around a λLINK wavelength where it is desired that a lasing peak be generated. This supplies high network strength in terms of section loss variations and greatly improves the OSNR of the WDM signal. High network survivability is also achievable.
摘要翻译：环路WDM光网络包括在环路（11）的部分之间的光放大器（12,16）和环路中的ASE再循环的光环路。在循环的一个点，激光束被注入并允许循环循环，激光束以波长为中心的波长为中心，期望产生激光峰。这在节段损耗变化方面提供了很高的网络强度，并大大提高了WDM信号的OSNR。高网络生存性也是可以实现的。

9. 发明授权

US06519080B2 Optical amplifier and optical transmission system 失效
标题翻译：光放大器和光传输系统
公开(公告)号：US06519080B2
公开(公告)日：2003-02-11
申请号：US09794033
申请日：2001-02-28
申请人： Paolo Vavassori , Paolo Gurnari , Giovanni Sacchi , Fabrizio Di Pasquale
发明人： Paolo Vavassori , Paolo Gurnari , Giovanni Sacchi , Fabrizio Di Pasquale
IPC分类号： H01S330
CPC分类号： H01S3/06758 , H01S3/06754 , H01S3/0677 , H01S3/094003 , H01S3/094011 , H01S3/1608 , H01S2303/00
摘要： An optical transmission system includes an optical transmitting unit (10) to transmit optical signals in a transmission wavelength band above 1570 nm; an optical receiving unit to receive the optical signals; an optical fiber link optically coupling the transmitting unit to the receiving unit, at least an optical amplifying unit (100) coupled along the link and adapted to amplify the optical signals; the optical amplifying unit (100) having an amplification wavelength band including the transmission wavelength band and comprising: an input (101) for the input of the optical signals, an output (102) for the output of the optical signals, at least an erbium-doped active fiber (103a, 103b) for the amplification of the optical signals, having a first end optically coupled to the input (101) and a second end optically coupled to the output (102), a pump source (104, 106) for generating a pump radiation having a wavelength greater than 1400 nm and lower than 1470 nm, and an optical coupler (105, 107) optically coupling the pump source (104) to the active fiber (103a, 103b).
摘要翻译：光传输系统包括：光传输单元（10），用于传输1570nm以上的传输波段的光信号; 光接收单元，用于接收光信号; 至少一个光纤放大单元（100），其沿着所述链路耦合并适于放大所述光信号; 所述光放大单元（100）具有包括所述透射波长带的放大波长带，并且包括：用于输入所述光信号的输入（101），用于输出所述光信号的输出（102），至少铒用于放大光信号的有源光纤（103a，103b），具有光耦合到输入端（101）的第一端和光耦合到输出端（102）的第二端，泵浦源（104,106）用于产生波长大于1400nm且低于1470nm的泵浦辐射;以及将泵浦源（104）光学耦合到有源光纤（103a，103b）的光耦合器（105,107）。

10. 发明申请

US20070285764A1 Counter-Pumped Distributed Raman Amplification in Wavelength Division Multiplex Optical Communication Systems 有权
标题翻译：波分复用光通信系统中的反泵浦分布式拉曼放大
公开(公告)号：US20070285764A1
公开(公告)日：2007-12-13
申请号：US10554193
申请日：2004-04-23
申请人： Simone Sugliani , Giovanni Sacchi , Fabrizio Di Pasquale
发明人： Simone Sugliani , Giovanni Sacchi , Fabrizio Di Pasquale
IPC分类号： H01S3/00
CPC分类号： H04B10/2916 , H01S3/094003 , H01S3/302
摘要： A Raman pump module for generating pump radiation having a pump wavelength (λp) for coupling into a transmission fiber of an optical wavelength division multiplex (WDM) communication system to provide Raman amplification of WDM radiation counter propagating therethrough is disclosed. The pump module is for use in a communications system in which the WDM radiation has a transmission waveband (λs) and wherein the transmission fiber has a zero dispersion wavelength (λm) lying midway between the transmission waveband and the pump wavelength. The module comprises a Raman pump laser for generating the pump radiation and a de-correlator for de-correlating the longitudinal modes of the pump radiation before it is coupled into the transmission fiber.
摘要翻译：一种拉曼泵模块，用于产生具有泵浦波长（λλp）的泵浦辐射，用于耦合到光波分复用（WDM）通信系统的传输光纤，以提供通过其传播的WDM辐射计数器的拉曼放大被披露。泵模块用于其中WDM辐射具有传输波段（λS）的通信系统中，并且其中传输光纤具有零色散波长（λ< ）位于传输波段和泵浦波长之间的中间。该模块包括用于产生泵浦辐射的拉曼泵激光器和用于在耦合到传输光纤之前将泵浦辐射的纵向模式解相关的去相关器。

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