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    Wider dynamic range to a FBG stabilized pump
    2.
    发明授权
    Wider dynamic range to a FBG stabilized pump 有权
    更宽的动态范围到FBG稳定泵

    公开(公告)号：US07016104B2

    公开(公告)日：2006-03-21

    申请号：US10610510

    申请日：2003-06-30

    申请人： Erji Mao ,  Stuart MacCormack ,  Greg Roth ,  Steven Sanders

    发明人： Erji Mao ,  Stuart MacCormack ,  Greg Roth ,  Steven Sanders

    IPC分类号： H01S3/00

    CPC分类号： H04B10/296 ,  H01S3/1305 ,  H01S3/1312 ,  H01S3/302 ,  H04B10/2916

    摘要： The present application relates to a Raman amplifier having an increased dynamic range, and particularly for laser pump sources and a method of pumping Raman fiber amplifiers over a greater dynamic range. In a multi-channel optical system, optical amplifiers must be able to provide gains over a large dynamic range, which is determined by the distribution of node-to-node distances in the network, as well as the number of channels. The present invention has found that the dynamic range of a Raman amplifier can be significantly increased by using pulse width modulation to pulse pump current at or near the minimum current stability threshold, in order to produce lower power output. The duty cycle of the pulsed current is selected to achieve a time-averaged operating condition, thus the time averaged pump power can be reduced in a linear fashion well below the capability of a continuous wave system.

    摘要翻译： 本申请涉及具有增加的动态范围的拉曼放大器，特别是用于激光泵浦源的拉曼放大器以及在更大动态范围内泵浦拉曼光纤放大器的方法。 在多通道光学系统中，光放大器必须能够在大的动态范围内提供增益，这取决于网络中节点到节点间距离的分布以及信道数量。 本发明已经发现，为了产生较低的功率输出，通过使脉冲宽度调制到等于或接近最小电流稳定阈值的脉冲泵电流，可以显着提高拉曼放大器的动态范围。 选择脉冲电流的占空比以实现时间平均的操作条件，因此可以以远低于连续波系统的能力的线性方式减小时间平均的泵浦功率。

    Automatic raman gain control
    3.
    发明授权
    Automatic raman gain control 有权
    自动拉曼增益控制

    公开(公告)号：US06963681B2

    公开(公告)日：2005-11-08

    申请号：US10611784

    申请日：2003-06-30

    申请人： Erji Mao ,  Stuart MacCormack ,  Greg Roth ,  Steven Sanders

    发明人： Erji Mao ,  Stuart MacCormack ,  Greg Roth ,  Steven Sanders

    IPC分类号： H01S3/13 ,  H01S3/131 ,  H01S3/30 ,  H04B10/17 ,  G02B6/26 ,  G02B6/42

    CPC分类号： H04B10/296 ,  H01S3/1305 ,  H01S3/1312 ,  H01S3/302 ,  H04B10/2916

    摘要： The invention relates to a method for automatic dynamic gain control in optical Raman amplifiers and an optical Raman amplifier adapted for the same. The present invention has found that in multiple pump Raman amplifiers a substantially linear relationship exists between total amplified signal power and pump power for each of different wavelength pumps, in order to maintain an original gain profile and gain levels for an optical link with a fully loaded channel configuration, in response to dropped channels. In accordance with the method, and an amplifier programmed to practice the method, a set of pump power values and signal level values required to maintain the characterized gain profile and gain levels for a plurality of channel loading configurations are pre-established for the each pump wavelength. A linear function from each set of pre-established values is derived for each pump wavelength. Advantageously, a single photodiode can replace a costly and complex channel monitor for providing signal responsive pump control.

    摘要翻译： 本发明涉及一种用于光学拉曼放大器中的自动动态增益控制的方法和适用于其的光学拉曼放大器。 本发明已经发现，在多个泵浦拉曼放大器中，对于每个不同波长的泵，总放大信号功率和泵浦功率之间存在基本上线性的关系，以便维持原始增益分布和具有满载的光链路的增益水平 频道配置，以响应丢失的频道。 根据该方法和被编程为实施该方法的放大器，为每个泵预先建立了维持多个通道加载配置的特征增益曲线和增益水平所需的一组泵功率值和信号电平值 波长。 从每个泵浦波长得到每组预先建立的值的线性函数。 有利地，单个光电二极管可以代替昂贵且复杂的通道监视器，以提供信号响应泵控制。

    Upconversion fiber laser
    5.
    发明授权
    Upconversion fiber laser 失效
    上变频光纤激光器

    公开(公告)号：US5677920A

    公开(公告)日：1997-10-14

    申请号：US572029

    申请日：1995-12-14

    申请人： Robert G. Waarts ,  David F. Welch ,  Steven Sanders ,  Donald R. Scifres

    发明人： Robert G. Waarts ,  David F. Welch ,  Steven Sanders ,  Donald R. Scifres

    IPC分类号： G02B6/036 ,  G02B6/42 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S5/10 ,  H01S5/40 ,  H01S3/30

    CPC分类号： G02B6/03638 ,  G02B6/03605 ,  G02B6/03633 ,  H01S3/06708 ,  H01S3/094003 ,  C03B2201/82 ,  C03B2203/12 ,  C03B2203/32 ,  G02B6/4204 ,  H01S3/06729 ,  H01S3/0675 ,  H01S3/094069 ,  H01S3/094092 ,  H01S3/0941 ,  H01S5/1064 ,  H01S5/4025

    摘要： An upconversion fiber laser uses a pump source which may be another fiber laser, such as a high power, diode-laser-pumped, fiber laser. The upconversion fiber laser includes an optical fiber whose core region is doped with an active lasing ionic species capable when optically pumped of undergoing upconversion excitation, such as certain rare earth ionic species, and which is embedded in a cladding of the optical fiber. Use of a fiber pump laser can improve coupling of pump light into the optical fiber, thereby achieving higher pump intensities in the core region and improved upconversion efficiency. The upconversion fiber laser's resonant laser cavity is defined by feedback means which can include at least one reflective grating formed in the optical fiber, as well as a reflective end face of the optical fiber. Any portion of the optical fiber that lies outside of the resonant laser cavity, such as any portion beyond the integral reflective grating, may act as an optical power amplifier for the upconverted laser output. The disclosure includes other embodiments in which pump brightness can be further increased with multiple pump sources.

    摘要翻译： 上转换光纤激光器使用可以是另一种光纤激光器的泵浦源，例如高功率，二极管激光泵浦的光纤激光器。 上转换光纤激光器包括光纤，其核心区域掺杂有当被泵浦经历上转换激发的活性激光离子物质，例如某些稀土离子物质，并且嵌入在光纤的包层中。 使用纤维泵浦激光器可以改善泵浦光与光纤的耦合，从而在芯区域实现更高的泵浦强度，并提高上转换效率。 上变频光纤激光器的谐振激光腔由反射装置限定，该反馈装置可以包括形成在光纤中的至少一个反射光栅以及光纤的反射端面。 位于谐振激光腔外部的光纤的任何部分，例如整个反射光栅之外的任何部分，都可以作为上变频激光输出的光功率放大器。 本公开包括其中可以使用多个泵浦源进一步增加泵亮度的其他实施例。

    High power, reliable optical fiber pumping system with high redundancy for use in lightwave communication system
    6.
    发明授权
    High power, reliable optical fiber pumping system with high redundancy for use in lightwave communication system 有权
    高功率，可靠的光纤泵浦系统，具有高冗余度用于光波通信系统

    公开(公告)号：US06356574B1

    公开(公告)日：2002-03-12

    申请号：US09240361

    申请日：1999-01-29

    申请人： Richard R. Craig ,  Robert L G. Waarts ,  David F. Welch ,  John G. Endriz ,  Dirk J. Kuizenga ,  Steven Sanders

    发明人： Richard R. Craig ,  Robert L G. Waarts ,  David F. Welch ,  John G. Endriz ,  Dirk J. Kuizenga ,  Steven Sanders

    IPC分类号： H01S30933

    CPC分类号： H01S3/094003 ,  H01S3/09408 ,  H01S3/2383 ,  H01S5/4025 ,  H01S5/4031

    摘要： A multistage optical amplifier pumping system with built-in redundant reliability for lightwave communication system provides plural levels of redundancy. A first level of redundancy deals with redundancy in the form of plural primary laser diode sources for pumping a single fiber laser pump source. A second level of redundancy deals with redundancy of a plurality of fiber laser pump sources for pumping a plurality of serially connected injection signal fiber amplifiers forming the multistage amplifier system. If one of fiber pump sources should fail, increased pumping power is available from the remaining fiber pump sources via their respectively connected amplifier stages. A third level of redundancy deals with redundancy in the employment of multiple single mode laser emitters on the same chip or bar sufficiently segmented and/or electrical isolated so as not to interfere with operation of or cause failure to adjacent or neighboring emitters on the same chip or bar.

    摘要翻译： 具有光波通信系统内置冗余可靠性的多级光放大器泵浦系统提供多级冗余。 第一级冗余处理用于泵浦单个光纤激光泵源的多个主激光二极管源的形式的冗余。 第二级冗余处理多个光纤激光泵浦源的冗余，用于泵浦形成多级放大器系统的多个串联连接的注入信号光纤放大器。 如果光纤泵浦源之一失效，则剩余的光纤泵浦源通过其分别连接的放大器级可以提供增加的泵浦功率。 第三级冗余处理在同一芯片或条上使用多个单模激光发射器的冗余，该芯片或条具有足够的分段和/或电隔离，以免干扰相同芯片上相邻或相邻发射器的操作或引起故障 或酒吧。

    Double-clad upconversion fiber laser
    8.
    发明授权
    Double-clad upconversion fiber laser 失效
    双层上转换光纤激光器

    公开(公告)号：US5530709A

    公开(公告)日：1996-06-25

    申请号：US301544

    申请日：1994-09-06

    申请人： Robert G. Waarts ,  David F. Welch ,  Steven Sanders ,  Donald R. Scifres

    发明人： Robert G. Waarts ,  David F. Welch ,  Steven Sanders ,  Donald R. Scifres

    IPC分类号： G02B6/036 ,  G02B6/42 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S5/10 ,  H01S5/40 ,  H01S3/30

    CPC分类号： G02B6/03638 ,  G02B6/03605 ,  G02B6/03633 ,  H01S3/06708 ,  H01S3/094003 ,  C03B2201/82 ,  C03B2203/12 ,  C03B2203/32 ,  G02B6/4204 ,  H01S3/06729 ,  H01S3/0675 ,  H01S3/094069 ,  H01S3/094092 ,  H01S3/0941 ,  H01S5/1064 ,  H01S5/4025

    摘要： An upconversion fiber laser with a double-clad fiber is pumped with a laser-diode-based laser pump source, the inner cladding of the fiber forming a low transmission loss waveguide for the pump light. The central core of the fiber is doped with an active lasing ionic species capable of undergoing upconversion excitation, such as certain rare earth ionic species. The use of a double-clad fiber permits the use of high power, high brightness laser diodes, including those with broad emitting apertures, as well as high power diode laser pumped fiber lasers, as the pump source, thereby achieving higher pump intensities within the upconversion laser fiber and improved upconversion efficiency. Pump brightness can be further increased with multiple pump schemes which use multiple pump wavelengths in different absorption bands, multiple pump wavelengths within the same absorption band, pump light from pairs of cross-polarized sources, and pumping from both ends of the fiber.

    摘要翻译： 具有双包层光纤的上转换光纤激光器用基于激光二极管的激光泵浦泵浦，纤维的内包层形成用于泵浦光的低传输损耗波导。 纤维的中心芯掺杂有能够经历上转换激发的活性激光离子物质，例如某些稀土离子物质。 使用双包层光纤允许使用大功率，高亮度激光二极管，包括具有广泛发射孔的激光二极管，以及作为泵浦源的大功率二极管激光泵浦光纤激光器，从而实现更高的泵浦强度 上转换激光光纤，提高转换效率。 泵浦亮度可以通过多种泵方案进一步提高，这些泵方案在不同吸收带内使用多个泵浦波长，在同一吸收带内的多个泵浦波长，来自成对的交叉极化源的泵浦光以及来自光纤两端的泵浦。