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1. 发明授权

US6141468A Method of apparatus for remotely pumping a rare-earth doped optical fiber amplifier and a communication system employing same 有权
标题翻译：用于远程泵浦稀土掺杂光纤放大器的装置的方法和采用它的通信系统
公开(公告)号：US6141468A
公开(公告)日：2000-10-31
申请号：US250333
申请日：1999-02-16
申请人： Howard David Kidorf , Karsten Rottwitt
发明人： Howard David Kidorf , Karsten Rottwitt
IPC分类号： H04B10/17 , G02B6/28
CPC分类号： H04B10/2916
摘要： A method and apparatus is provided for providing pump energy to a doped optical fiber located along an optical transmission path. The doped optical fiber imparts amplification to an optical signal when pumped at a pump wavelength. In accordance with the method, pump energy is generated in the transmission fiber by introducing a power at a wavelength one Raman Stokes order below the desired pump wavelength. The pump energy is transmitted along the transmission path such that first order Raman Stokes-shifted light is applied to the doped optical fiber. For example, if the optical fiber is doped with erbium, which has a pump wavelength of about 1485 nm, pump energy is provided at a wavelength of 1390 nm.
摘要翻译：提供了一种方法和装置，用于向位于光传输路径的掺杂光纤提供泵浦能量。当泵浦波长泵浦时，掺杂的光纤对光信号进行放大。根据该方法，通过将波长为一拉曼斯托克斯次数的功率引入到低于期望的泵波长的范围内，在传输光纤中产生泵浦能量。泵浦能量沿着传输路径传输，使得一阶拉曼斯托克斯位移的光被施加到掺杂的光纤。例如，如果光纤掺杂有具有约1485nm的泵浦波长的铒，则在1390nm的波长处提供泵浦能量。

2. 发明授权

US6052219A Wide bandwidth Raman amplifier capable of employing pump energy spectrally overlapping the signal 有权
标题翻译：宽带宽拉曼放大器能够采用泵浦能量与信号频谱重叠
公开(公告)号：US6052219A
公开(公告)日：2000-04-18
申请号：US250343
申请日：1999-02-16
申请人： Howard David Kidorf , Karsten Rottwitt
发明人： Howard David Kidorf , Karsten Rottwitt
IPC分类号： H01S3/30 , H01S3/00
CPC分类号： H01S3/302
摘要： A Raman amplifier is provided that includes at least a portion of optical fiber in which an optical signal travels. The optical fiber portion may encompass all or part of the optical transmission path of an optical communication system. A pump energy unit is provided that includes first and second pump sources providing pump power at first and second wavelengths, respectively. The first and second wavelengths generate first and second overlapping gain profiles in the optical fiber portion. An optical circulator has a first port receiving the pump power, a second port providing the pump power to the optical fiber and receiving the optical signal, and a third port transmitting the optical signal received from the second port. As a result of this arrangement, a Raman amplifier is provided in which the bandwidth is substantially increased over the bandwidth that can be achieved by the previously mentioned Raman amplifier.
摘要翻译：提供了拉曼放大器，其包括光信号行进的光纤的至少一部分。光纤部分可以包括光通信系统的全部或部分光传输路径。提供了泵能量单元，其包括分别在第一和第二波长处提供泵浦功率的第一和第二泵浦源。第一和第二波长在光纤部分中产生第一和第二重叠增益分布。光循环器具有接收泵功率的第一端口，向光纤提供泵浦功率并接收光信号的第二端口，以及传输从第二端口接收的光信号的第三端口。作为这种布置的结果，提供了一种拉曼放大器，其中带宽在先前提到的拉曼放大器可以实现的带宽上显着增加。

3. 发明授权

US6081366A Optical fiber communication system with a distributed Raman amplifier and a remotely pumped er-doped fiber amplifier 失效
标题翻译：具有分布式拉曼放大器和远程泵浦铒掺杂光纤放大器的光纤通信系统
公开(公告)号：US6081366A
公开(公告)日：2000-06-27
申请号：US921984
申请日：1997-08-28
申请人： Howard David Kidorf , Kenneth Lee Walker
发明人： Howard David Kidorf , Kenneth Lee Walker
IPC分类号： H01S3/10 , G03F7/004 , G03F7/039 , H01S3/06 , H01S3/094 , H01S3/23 , H01S3/30 , H04B10/17 , H01S3/00
CPC分类号： H04B10/2916 , G03F7/0045 , G03F7/0392 , H04B2210/003
摘要： The disclosed optical fiber communication system comprises a remotely pumped erbium-doped fiber amplifier (EDFA). The pump radiation is de-tuned with respect to wavelength, the wavelength being selected longer than both the optimal wavelengths for pumping the EDFA and for producing Raman gain in the transmission fiber, respectively. Such de-tuning results in improved over-all system performance through reduced multi-path interference. Exemplarily, the pump radiation has wavelength in the range 1490-1510 nm.
摘要翻译：所公开的光纤通信系统包括远程泵浦掺铒光纤放大器（EDFA）。泵浦辐射相对于波长被去调谐，波长选择的时间长于用于泵浦EDFA的最佳波长并且分别在传输光纤中产生拉曼增益。这种去调谐通过减少的多路径干扰导致改进的全部系统性能。示例性地，泵浦辐射具有在1490-1510nm范围内的波长。

4. 发明授权

US06181464B2 Low noise Raman amplifier employing bidirectional pumping and an optical transmission system incorporating same 有权
标题翻译：采用双向泵浦的低噪声拉曼放大器和并入其的光传输系统
公开(公告)号：US06181464B2
公开(公告)日：2001-01-30
申请号：US09204035
申请日：1998-12-01
申请人： Howard David Kidorf , Xiaobing Ma , Morten Nissov
发明人： Howard David Kidorf , Xiaobing Ma , Morten Nissov
IPC分类号： H01S330
CPC分类号： H01S3/302 , H01S3/06754 , H01S3/094011 , H01S2301/02
摘要： A method and apparatus provides pump energy to an optical fiber located along an optical transmission path. The optical fiber imparts Raman amplification to an optical signal traveling therein when pumped at a pump wavelength. In accordance with the method, a first beam of pump energy is generated at the pump wavelength of the optical signal and a second beam of pump energy at a wavelength one Raman Stokes order below the pump wavelength. The first beam of pump energy is introduced to the optical fiber so that it contrapropagates with respect to the optical signal. The second beam of pump energy is introduced to the optical fiber so that it co-propagates with respect to the optical signal. The second beam of pump energy does not pump the signal (thus minimizing noise) but rather serves to pump the first pump beam by the production of Raman Stokes- shifted light.
摘要翻译：方法和装置向位于光传输路径的光纤提供泵浦能量。当以泵浦波长泵浦时，光纤向其中行进的光信号施加拉曼放大。根据该方法，在光信号的泵浦波长处产生第一波束能量，并且在波长为一个拉曼斯托克斯次序的泵浦波长下的第二波束泵浦能量产生。泵浦能量的第一个光束被引入到光纤中，使得它相对于光信号相反地传播。泵浦能量的第二束被引入到光纤中，使得它相对于光信号共传播。泵浦能量的第二波束不会泵浦信号（从而使噪声最小化），而是通过产生拉曼斯托克斯偏移光来泵浦第一泵浦光束。

5. 发明授权

US6147796A Method for determining transmission parameters for the data channels of a WDM optical communication system 有权
标题翻译：用于确定WDM光通信系统的数据信道的传输参数的方法
公开(公告)号：US6147796A
公开(公告)日：2000-11-14
申请号：US228732
申请日：1999-01-12
申请人： Xiabing Ma , Morten Nissov , Howard David Kidorf
发明人： Xiabing Ma , Morten Nissov , Howard David Kidorf
IPC分类号： H04B10/17 , H01S3/00
CPC分类号： H04B10/2935
摘要： A method is provided for determining at least one optical transmission parameter for achieving a prescribed operating characteristic of an optical transmission system that includes at least one optical amplifier. The optical transmission parameter to be determined may include, for example, the channel wavelengths that are employed, the channel powers, and/or the spacing between adjacent channels.The method begins by transmitting through the transmission system a plurality of saturating optical wavelengths such that the optical amplifiers operate at a desired operating point within a region of gain compression. A plurality of probe wavelengths are transmitted through the transmission system. The probe wavelengths have a total power insufficient to substantially change the desired operating point of the optical amplifiers. The plurality of probe wavelengths are characterized by at least one optical transmission parameter. Next, an initial operating characteristic of the transmission system is determined. The optical transmission parameter of the plurality of probe wavelengths is then varied to determine a second operating characteristic of the transmission system. The steps of determining an initial operating characteristic and varying the optical transmission parameter is repeated until a resulting operating characteristic of the transmission system is substantially equal to the prescribed operating characteristic.
摘要翻译：提供了一种用于确定至少一个光传输参数以实现包括至少一个光放大器的光传输系统的规定操作特性的方法。要确定的光传输参数可以包括例如采用的信道波长，信道功率和/或相邻信道之间的间隔。该方法开始于通过传输系统传输多个饱和光波长，使得光放大器在增益压缩区域内的期望工作点处工作。多个探测波长通过传输系统传输。探测波长具有不足以基本上改变光放大器的期望工作点的总功率。多个探测波长的特征在于至少一个光传输参数。接下来，确定传输系统的初始操作特性。然后改变多个探测波长的光传输参数以确定传输系统的第二操作特性。重复确定初始操作特性和改变光传输参数的步骤，直到传输系统的最终操作特性基本上等于规定的操作特性。

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