公开(公告)号：US06215809B1

公开(公告)日：2001-04-10

申请号：US09197062

申请日：1998-11-20

申请人： Mehrdad Ziari ,  Robert G. Waarts ,  Robert J. Lang ,  John DeAndrea ,  Michael L. Bortz ,  Brian F. Ventrudo

发明人： Mehrdad Ziari ,  Robert G. Waarts ,  Robert J. Lang ,  John DeAndrea ,  Michael L. Bortz ,  Brian F. Ventrudo

IPC分类号： H01S308

CPC分类号： H01S3/094003 ,  H01S5/0652 ,  H01S5/146

摘要： Apparatus for providing a laser source optically coupled to an optical waveguide, such as an optical fiber, having a reflective grating positioned from the output facet of the laser source a distance equal to or greater than the coherence length of the laser source providing a portion of reflective feedback into the laser source optical cavity to maintain wavelength operation of the laser source in spite of changes in the laser operating temperature or drive current based upon coherence collapse in the laser operation. In cases where the fiber grating is positioned in the fiber within the coherence length of the laser source, intermittent coherence collapse, as opposed to continuous coherence collapse, is unavoidable. In cases where such a laser source is a pumping source for a solid state gain medium, such as an optical amplifier or laser having an active gain element, e.g., an Er doped amplifier, undesirable perturbations in the laser source output are present which have a deleterious effect on the operation of the solid state gain medium. The effect of these undesirable perturbations are substantially removed by a small, continuous variation or dither in the driving current of the laser source having a rate of variation that exceeds the active gain element excited state lifetime thereby controlling the switching of the laser source operation between states of coherency and coherence collapse. As a result, the effects of laser source perturbations are avoided so as not to have an effect on the operation of the coupled solid state gain medium so that its gain stability is improved. Various embodiments of dither circuits are disclosed. In addition, polarization-maintaining behavior is induced in optical waveguides to further improve laser source stability.

摘要翻译： 用于提供光学耦合到诸如光纤的光波导的激光源的设备，其具有从激光源的输出小面定位的反射光栅，距离等于或大于激光源的相干长度，该距离提供一部分 反射反射到激光源光学腔中以保持激光源的波长操作，尽管激光器工作温度或驱动电流基于激光器操作中的相干性崩溃而发生变化。 在光纤光栅位于激光源的相干长度内的纤维光纤的情况下，与连续相干塌陷相反，间歇性相干塌陷是不可避免的。 在这种激光源是用于固态增益介质的泵浦源的情况下，例如具有有源增益元件（例如，Er掺杂放大器）的光放大器或激光器，存在激光源输出中的不期望的扰动，其具有 对固态增益介质的操作有害的影响。 这些不期望的扰动的效果通过在激光源的驱动电流中的小的连续变化或抖动基本上消除，其具有超过有源增益元件激发态寿命的变化率，从而控制状态之间的激光源操作的切换 的一致性和一致性崩溃。 结果，避免了激光源扰动的影响，从而不会对耦合的固态增益介质的操作产生影响，从而提高了其增益稳定性。 公开了抖动电路的各种实施例。 此外，在光波导中引起偏振保持行为以进一步提高激光源的稳定性。

公开(公告)号：US20140056593A1

公开(公告)日：2014-02-27

申请号：US13950482

申请日：2013-07-25

申请人： John DeAndrea ,  Massimo Di Blassio

发明人： John DeAndrea ,  Massimo Di Blassio

IPC分类号： H04B10/40

CPC分类号： H04B10/40 ,  H04B10/291

摘要： A linecard includes at least one pluggable device, a linecard processor, and a centralized host processor. The linecard also includes an interface that supports a pluggable device. A pluggable device is electrically coupled to the interface and is controlled by the centralized host processor. A flash memory stores data for the pluggable device. The pluggable device can include at least one of an optical amplifier and a ROADM pluggable device.

摘要翻译： 线卡包括至少一个可插拔设备，线卡处理器和集中式主机处理器。 线卡还包括支持可插拔设备的接口。 可插拔设备电耦合到接口并由中央主机处理器控制。 闪存存储可插拔设备的数据。 可插拔设备可以包括光放大器和ROADM可插拔设备中的至少一个。

公开(公告)号：US09397754B2

公开(公告)日：2016-07-19

申请号：US13950482

申请日：2013-07-25

申请人： John DeAndrea ,  Massimo Di Blassio

发明人： John DeAndrea ,  Massimo Di Blassio

IPC分类号： H04B10/00 ,  H04B10/06 ,  H04B10/40 ,  H04B10/291

CPC分类号： H04B10/40 ,  H04B10/291

摘要： A linecard includes at least one pluggable device, a linecard processor, and a centralized host processor. The linecard also includes an interface that supports a pluggable device. A pluggable device is electrically coupled to the interface and is controlled by the centralized host processor. A flash memory stores data for the pluggable device. The pluggable device can include at least one of an optical amplifier and a ROADM pluggable device.

摘要翻译： 线卡包括至少一个可插拔设备，线卡处理器和集中式主机处理器。 线卡还包括支持可插拔设备的接口。 可插拔设备电耦合到接口并由中央主机处理器控制。 闪存存储可插拔设备的数据。 可插拔设备可以包括光放大器和ROADM可插拔设备中的至少一个。