公开(公告)号：US20060209394A1

公开(公告)日：2006-09-21

申请号：US10520277

申请日：2004-09-28

申请人： Sergueil Papernyi ,  Vladimir Karpov ,  Vladimir Ivanov ,  Wallace Clements

发明人： Sergueil Papernyi ,  Vladimir Karpov ,  Vladimir Ivanov ,  Wallace Clements

IPC分类号： H01S3/00

CPC分类号： H04B10/291 ,  H04B10/2916

摘要： A method for pumping remote optically-pumped fiber amplifiers (ROPAs) in fiber-optic telecommunication systems is disclosed which uses cascaded Raman amplification to increase the maximum amount of pump power that can be delivered to the ROPA. According to the prior art, high power at the ROPA pump wavelength, λp, is launched directly into the fiber and the maximum launch power is limited by the onset of pump depletion by Raman noise and oscillations due to the high Raman gain at ˜(λp+100) nm. In preferred embodiments of the present invention, a ‘primary’ pump source of wavelength shorter than λp is launched into the delivery fiber along with two or more significantly lower-power ‘seed’ sources, among which is included one at λp. The wavelength and power of the seed source(s) are chosen such that, when combined with the high-power primary source, a series, n, where n≧2, of Raman conversions within the fiber ultimately leads to the development of high power at λp. In another embodiment, one or more of the seed sources at wavelengths shorter than λp are replaced by reflecting means to return, into the fiber, backward-travelling amplified spontaneous Raman scattered light resulting from high power in the fiber at a wavelength one Raman shift below the particular seed wavelength. In either case, the high power at λp is developed over a distributed length of the fiber, reaching its maximum some distance into the fiber and exceeding the maximum power possible at that point with the prior art.

公开(公告)号：US07508575B2

公开(公告)日：2009-03-24

申请号：US10520277

申请日：2004-09-28

申请人： Serguei Papernyi ,  Vladimir Karpov ,  Vladimir Ivanov ,  Wallace Clements

发明人： Serguei Papernyi ,  Vladimir Karpov ,  Vladimir Ivanov ,  Wallace Clements

IPC分类号： H04B10/17 ,  H04B10/12

CPC分类号： H04B10/291 ,  H04B10/2916

摘要： A method for pumping remote optically-pumped fiber amplifiers (ROPAs) in fiber-optic telecommunication systems is disclosed which uses cascaded Raman amplification to increase the maximum amount of pump power that can be delivered to the ROPA. According to the prior art, high power at the ROPA pump wavelength, λp, is launched directly into the fiber and the maximum launch power is limited by the onset of pump depletion by Raman noise and oscillations due to the high Raman gain at ˜(λp+100) nm. In preferred embodiments of the present invention, a ‘primary’ pump source of wavelength shorter than λp is launched into the delivery fiber along with two or more significantly lower-power ‘seed’ sources, among which is included one at λp. The wavelength and power of the seed source(s) are chosen such that, when combined with the high-power primary source, a series, n, where n≧2, of Raman conversions within the fiber ultimately leads to the development of high power at λp. In another embodiment, one or more of the seed sources at wavelengths shorter than λp are replaced by reflecting means to return, into the fiber, backward-travelling amplified spontaneous Raman scattered light resulting from high power in the fiber at a wavelength one Raman shift below the particular seed wavelength. In either case, the high power at λp is developed over a distributed length of the fiber, reaching its maximum some distance into the fiber and exceeding the maximum power possible at that point with the prior art.

摘要翻译： 公开了一种用于在光纤通信系统中泵浦远程光泵浦光纤放大器（ROPA）的方法，其使用级联拉曼放大来增加可以传送到ROPA的最大泵浦功率量。 根据现有技术，ROPA泵浦波长（Lambdap）的高功率直接发射到光纤中，并且最大发射功率受到拉曼噪声泵浦耗尽的启动以及由于〜（羔羊皮）处的高拉曼增益引起的振荡 +100）nm。 在本发明的优选实施例中，波长短于lambdap的“初级”泵浦源与两个或更多个明显较低功率的“种子”源一起发射到输送纤维中，其中包括一个在羔羊皮上。 种子源的波长和功率被选择为使得当与大功率初级源组合时，光纤内的拉曼转换的n> = 2的系列n最终导致高的发展 权力在羔羊 在另一个实施例中，波长短于lambdap的一个或多个种子源被反射装置所取代，以将光纤中的大功率产生的向后移动的放大自发拉曼散射光返回到光纤中，波长为一拉曼转换低于 特定的种子波长。 在任一种情况下，在光纤的分布长度上开发出lambdap上的高功率，在现有技术中达到其在光纤中的最大距离，并超过了该点可能的最大功率。

公开(公告)号：US06480326B2

公开(公告)日：2002-11-12

申请号：US09899544

申请日：2001-07-06

申请人： Serguei Papernyi ,  Vladimir Karpov ,  Wallace Clements

发明人： Serguei Papernyi ,  Vladimir Karpov ,  Wallace Clements

IPC分类号： H01S300

CPC分类号： H04B10/2916

摘要： A pumping scheme for distributed Raman amplification (DRA) in optical fiber telecommunication systems is disclosed in which pump energy at the wavelength(s) required for DRA of the transmitted optical signal(s) is developed within the transmission fiber through a series, n, where n≧1, of Raman conversions. In preferred embodiments, a ‘primary’ pump source of wavelength shorter than the ultimately desired pump wavelength(s) is launched into the fiber along with one or more significantly lower-power secondary ‘seed’ sources. The wavelength and power of the secondary source(s) are chosen such that, when combined with the high-power primary source, Raman conversions within the fiber ultimately lead to the development of high power at the desired pump wavelength(s). In another embodiment, one or more seed sources are replaced by reflecting means to return, into the fiber, backward-travelling amplified spontaneous Raman scattered light resulting from high power in the fiber at a wavelength one Raman shift below the desired seed wavelength. In either case, the high power at the wavelength(s) required for DRA of the signal(s) is developed over a distributed length of the fiber rather than being launched from a terminal point, as in the prior art. Consequently, the maximum power at the desired pump wavelength(s), and the peak signal gain, occur some distance into the fiber from the launch terminal. In one exemplary embodiment, a distributed Raman preamplifier, improved noise performance results, since the Raman gain occurs, on average, at a greater distance from the receiving terminal than with the standard pumping scheme.

摘要翻译： 公开了一种用于光纤通信系统中的分布式拉曼放大（DRA）的泵浦方案，其中通过一系列传输光信号在传输光纤内形成所发射的光信号的DRA所需波长的泵浦能量， 其中n> = 1，拉曼转换。 在优选实施例中，与一个或多个显着较低功率的次级“种子”源一起，将长度短于最终期望的泵浦波长的“初级”泵浦源发射到光纤中。 选择次级源的波长和功率使得当与高功率初级源组合时，光纤内的拉曼转换最终导致在期望的泵浦波长下的高功率的发展。 在另一个实施例中，一个或多个种子源被反射装置所代替，以将纤维中的高功率产生的反向行进放大的自发拉曼散射光返回到低于期望种子波长的波长为一个拉曼位移。 在任一种情况下，信号DRA所需的波长的高功率在光纤的分布长度上展开，而不是像现有技术那样从终端发射。 因此，在期望的泵浦波长（s）的最大功率和峰值信号增益从发射端子发射到光纤的一定距离。 在一个示例性实施例中，分布式拉曼前置放大器具有改善的噪声性能，因为平均来说，拉曼增益在距离接收终端更远的地方比标准泵送方案发生。