公开(公告)号：US11460639B2

公开(公告)日：2022-10-04

申请号：US16445033

申请日：2019-06-18

申请人： Lawrence Livermore National Security, LLC

发明人： Graham S. Allen ,  Diana C. Chen ,  Matthew J. Cook ,  Robert P. Crist ,  Derrek R. Drachenberg ,  Jay W. Dawson ,  Victor V. Khitrov ,  Leily Kiani ,  Michael J. Messerly ,  Paul H. Pax ,  Nick Schenkel

IPC分类号： G02B6/293 ,  G02B6/30

摘要： An all fiber wavelength selective coupler provides wavelength selective transfer of optical energy between two or more separated waveguides. The coupler includes signal cores that are separated enough that they can be fusion spliced to standard fibers as lead-in and lead-out pigtails. A bridge between the signal cores facilitates transfer of the optical energy through a process of evanescent coupling. In one example, the bridge is formed of a series of graded index cores.

公开(公告)号：US10222253B2

公开(公告)日：2019-03-05

申请号：US15175423

申请日：2016-06-07

申请人： LAWRENCE LIVERMORE NATIONAL SECURITY, LLC

发明人： Jay W. Dawson ,  Graham S. Allen ,  Michael R. Carter ,  John E. Heebner ,  Michael J. Messerly ,  Paul H. Pax ,  Alexander M. Rubenchik

IPC分类号： G01D5/58 ,  G01H9/00

摘要： A system for aerially surveying an area where a plane may have crashed in water and locating pings from the plane's black box using a laser on an aerial platform that produces laser pulses; using a launch telescope to direct the laser pulses to the water producing scattering from the laser pulses and a continuous stream of backscatter; using a receiving telescope to collect the continuous stream of backscatter; using an interferometer operatively connected to the receiving telescope to produce two outputs, wherein one output is the continuous stream of backscatter, and wherein the other output is a delayed replica of the first output; and using a data collection and analysis unit operatively connected to the interferometer to produce a measurement of the sound.

公开(公告)号：US20180045544A1

公开(公告)日：2018-02-15

申请号：US15175423

申请日：2016-06-07

申请人： LAWRENCE LIVERMORE NATIONAL SECURITY, LLC

发明人： Jay W. Dawson ,  Graham S. Allen ,  Michael R. Carter ,  John E. Heebner ,  Michael J. Messerly ,  Paul H. Pax ,  Alexander M. Rubenchik

IPC分类号： G01D5/58

CPC分类号： G01H9/00

摘要： A system for aerially surveying an area where a plane may have crashed in water and locating pings from the plane's black box using a laser on an aerial platform that produces laser pulses; using a launch telescope to direct the laser pulses to the water producing scattering from the laser pulses and a continuous stream of backscatter; using a receiving telescope to collect the continuous stream of backscatter; using an interferometer operatively connected to the receiving telescope to produce two outputs, wherein one output is the continuous stream of backscatter, and wherein the other output is a delayed replica of the first output; and using a data collection and analysis unit operatively connected to the interferometer to produce a measurement of the sound.

公开(公告)号：US09124066B2

公开(公告)日：2015-09-01

申请号：US13791563

申请日：2013-03-08

申请人： Lawrence Livermore National Security, LLC

发明人： Arun K. Sridharan ,  Paul H. Pax ,  John E. Heebner ,  Derrek R. Drachenberg ,  James P. Armstrong ,  Jay W. Dawson

IPC分类号： H01S3/10 ,  H01S3/13 ,  H01S3/23 ,  H01S3/067 ,  H01S3/00

CPC分类号： H01S3/10007 ,  G02B5/1814 ,  H01S3/005 ,  H01S3/0085 ,  H01S3/06729 ,  H01S3/10015 ,  H01S3/10023 ,  H01S3/10053 ,  H01S3/1307 ,  H01S3/2333 ,  H01S3/2383

摘要： Spatial mode conversion modules are described, with the capability of efficiently transforming a given optical beam profile, at one plane in space into another well-defined optical beam profile at a different plane in space, whose detailed spatial features and symmetry properties can, in general, differ significantly. The modules are comprised of passive, high-efficiency, low-loss diffractive optical elements, combined with Fourier transform optics. Design rules are described that employ phase retrieval techniques and associated algorithms to determine the necessary profiles of the diffractive optical components. System augmentations are described that utilize real-time adaptive optical techniques for enhanced performance as well as power scaling.

摘要翻译： 描述空间模式转换模块，其具有在空间中的一个平面处有效地将给定光束轮廓变换成空间中不同平面上的另一个明确定义的光束轮廓的能力，其一般的空间特征和对称性可以一般 ，差别很大。 这些模块包括与傅里叶变换光学器件相结合的无源，高效，低损耗衍射光学元件。 描述了使用相位检索技术和相关联的算法来确定衍射光学部件的必要轮廓的设计规则。 描述了利用实时自适应光学技术来提高性能和功率缩放的系统增强。

公开(公告)号：US11462878B2

公开(公告)日：2022-10-04

申请号：US16881388

申请日：2020-05-22

申请人： Lawrence Livermore National Security, LLC

发明人： Paul H. Pax ,  Diana C. Chen ,  Michael J. Messerly

IPC分类号： G02B6/00 ,  H01S3/067 ,  G02B6/02

摘要： An all solid hybrid waveguiding structure provides large mode area, acceptable losses of the desired core mode and very high losses of the undesired next higher order mode in the core. Embodiments of the waveguide include a hybrid of low index barriers providing confinement by total internal reflection, and further include high index rings that support guided modes only at effective indices different from that of the desired core mode.

公开(公告)号：US20190310420A1

公开(公告)日：2019-10-10

申请号：US16445033

申请日：2019-06-18

申请人： Lawrence Livermore National Security, LLC

发明人： Graham S. Allen ,  Diana C. Chen ,  Matthew J. Cook ,  Robert P. Crist ,  Derrek R. Drachenberg ,  Jay W. Dawson ,  Victor V. Khitrov ,  Leily Kiani ,  Michael J. Messerly ,  Paul H. Pax ,  Nick Schenkel

IPC分类号： G02B6/293

摘要： An all fiber wavelength selective coupler provides wavelength selective transfer of optical energy between two or more separated waveguides. The coupler includes signal cores that are separated enough that they can be fusion spliced to standard fibers as lead-in and lead-out pigtails. A bridge between the signal cores facilitates transfer of the optical energy through a process of evanescent coupling. In one example, the bridge is formed of a series of graded index cores.

公开(公告)号：US20190199050A1

公开(公告)日：2019-06-27

申请号：US15854468

申请日：2017-12-26

申请人： Lawrence Livermore National Security, LLC

发明人： Derrek R. Drachenberg ,  Jay W. Dawson ,  Michael J. Messerly ,  Paul H. Pax

IPC分类号： H01S3/042 ,  H01S3/16 ,  H01S3/067

CPC分类号： H01S3/042 ,  H01S3/0672 ,  H01S3/06729 ,  H01S3/1603

摘要： A uniform temperature profile is provided across the width of the core of a ribbon fiber laser or amplifier by the use of insulating elements at the core edges and a spatially variable gain in the fiber core. High average power ribbon fibers, enable a variety of applications such as practical laser cutting and beam combining.

公开(公告)号：US20170229834A1

公开(公告)日：2017-08-10

申请号：US15288590

申请日：2016-10-07

申请人： Lawrence Livermore National Security, LLC

发明人： Paul H. Pax ,  Graham S. Allen ,  Jay W. Dawson ,  Derrek Reginald Drachenberg ,  Victor V. Khitrov ,  Michael J. Messerly ,  Nick Schenkel

IPC分类号： H01S3/067 ,  G02B6/14 ,  H01S3/16 ,  G02B6/02

CPC分类号： H01S3/06741 ,  G02B6/02338 ,  G02B6/02347 ,  G02B6/0238 ,  G02B6/14 ,  H01S3/06716 ,  H01S3/06733 ,  H01S3/08045 ,  H01S3/094007 ,  H01S3/1603 ,  H01S3/1611

摘要： Rare earth doped fiber lasers can be robust and efficient sources of high quality light, but are usually limited to the highest gain transitions of the active species. But rare earths typically possess a multitude of potentially useful transitions that might be accessed if the dominant transition can be suppressed. In fiber lasers this suppression is complicated by the very high net gain the dominant transitions exhibit; effective suppression requires some mechanism distributed along the length of the fiber. We have developed a novel waveguide with resonant leakage elements that frustrate guidance at well-defined and selectable wavelengths. Based on this waveguide, we have fabricated a Large Mode Area Neodymium doped fiber with suppression of the four-level transition around 1060 nm, and demonstrated lasing on the three-level transition at 930 nm with good efficiency.

公开(公告)号：US09373928B2

公开(公告)日：2016-06-21

申请号：US14797003

申请日：2015-07-10

申请人： Lawrence Livermore National Security, LLC

发明人： Arun K. Sridharan ,  Paul H. Pax ,  John E. Heebner ,  Derrek R. Drachenberg ,  James P. Armstrong ,  Jay W. Dawson

IPC分类号： H01S3/10 ,  H01S3/067 ,  G02B5/18 ,  H01S3/00 ,  H01S3/13 ,  H01S3/23

CPC分类号： H01S3/10007 ,  G02B5/1814 ,  H01S3/005 ,  H01S3/0085 ,  H01S3/06729 ,  H01S3/10015 ,  H01S3/10023 ,  H01S3/10053 ,  H01S3/1307 ,  H01S3/2333 ,  H01S3/2383

摘要： Spatial mode conversion modules are described, with the capability of efficiently transforming a given optical beam profile, at one plane in space into another well-defined optical beam profile at a different plane in space, whose detailed spatial features and symmetry properties can, in general, differ significantly. The modules are comprised of passive, high-efficiency, low-loss diffractive optical elements, combined with Fourier transform optics. Design rules are described that employ phase retrieval techniques and associated algorithms to determine the necessary profiles of the diffractive optical components. System augmentations are described that utilize real-time adaptive optical techniques for enhanced performance as well as power scaling.

公开(公告)号：US09172208B1

公开(公告)日：2015-10-27

申请号：US13771770

申请日：2013-02-20

申请人： Lawrence Livermore National Security, LLC

发明人： Jay W. Dawson ,  Graham S. Allen ,  Paul H. Pax ,  John E. Heebner ,  Arun K. Sridharan ,  Alexander M. Rubenchik ,  Chrisopher B. J. Barty

IPC分类号： G01C3/08 ,  H01S3/30

CPC分类号： H01S3/302 ,  H01S3/005 ,  H01S3/0625 ,  H01S3/094042 ,  H01S3/09408 ,  H01S3/2308 ,  H01S3/30

摘要： An optical source capable of enhanced scaling of pulse energy and brightness utilizes an ensemble of single-aperture fiber lasers as pump sources, with each such fiber laser operating at acceptable pulse energy levels. Beam combining involves stimulated Raman scattering using a Stokes' shifted seed beam, the latter of which is optimized in terms of its temporal and spectral properties. Beams from fiber lasers can thus be combined to attain pulses with peak energies in excess of the fiber laser self-focusing limit of 4 MW while retaining the advantages of a fiber laser system of high average power with good beam quality.

摘要翻译： 能够增强脉冲能量和亮度的缩放的光源利用单孔光纤激光器的集合作为泵浦源，每个这样的光纤激光器以可接受的脉冲能量级运行。 光束组合涉及使用斯托克斯移位种子束的受激拉曼散射，后者根据其时间和光谱特性进行优化。 光纤激光器的光束可以组合起来，获得超过光纤激光自聚焦极限4兆帕的峰值能量的脉冲，同时保持具有良好光束质量的高平均功率的光纤激光系统的优点。