公开(公告)号：US20050157760A1

公开(公告)日：2005-07-21

申请号：US10761723

申请日：2004-01-20

Applicant: Robert Rice ,  Michael Wickham ,  Eric Cheung ,  Hiroshi Komine ,  Joshua Rothenberg

Inventor： Robert Rice ,  Michael Wickham ,  Eric Cheung ,  Hiroshi Komine ,  Joshua Rothenberg

IPC: G02F1/37 ,  H01S3/067 ,  H01S3/10 ,  H01S3/108 ,  H01S3/23 ,  H01S3/30

CPC classification number: H01S3/1083 ,  G02F1/3534 ,  H01S3/06754 ,  H01S3/10015 ,  H01S3/10023 ,  H01S3/2383

Abstract: A laser array architecture scalable to very high powers by fiber amplifiers, but in which the output wavelength is selectable, and not restricted by the wavelengths usually inherent in the choice of fiber materials. A pump beam at a first frequency is amplified in the fiber amplifier array and is mixed with a secondary beam at a second frequency to yield a frequency difference signal from each of an array of optical parametric amplifiers. A phase detection and correction system maintains the array of outputs from the amplifiers in phase coherency, resulting in a high power output at the desired wavelength. A degenerate form of the architecture is disclosed in an alternate embodiment, and a third embodiment employs dual wavelength fiber amplifiers to obtain an output at a desired difference frequency.

Abstract translation: 激光阵列架构由光纤放大器可扩展到非常高的功率，但其中输出波长是可选择的，而不受通常选择光纤材料固有的波长的限制。 第一频率的泵浦光束在光纤放大器阵列中被放大，并且以第二频率与次级光束混合，以产生来自光学参量放大器阵列中的每一个的频差信号。 相位检测和校正系统保持来自放大器的输出阵列的相位一致性，导致在所需波长处的高功率输出。 在替代实施例中公开了该架构的简并形式，并且第三实施例采用双波长光纤放大器以期望的差频获得输出。

公开(公告)号：US20080025356A1

公开(公告)日：2008-01-31

申请号：US11895571

申请日：2007-08-24

Applicant: Joshua Rothenberg

Inventor： Joshua Rothenberg

IPC: H01S3/04

CPC classification number: H01S3/0941 ,  H01S3/0606 ,  H01S3/063 ,  H01S3/08095 ,  H01S3/2308 ,  H01S3/2333 ,  H01S3/2341 ,  H01S3/2383 ,  H01S2301/02

Abstract: A high power laser system is provided having a master oscillator for generating a reference laser beam of desired beam quality, means for dividing the reference beam into multiple sub-beams, a multi-slab gain module positioned to receive the multiple sub-beams as input beams, and means for adjusting the sub-beams in phase to allow the output sub-beams to be coherently combined as a single composite output beam. Optionally, additional multi-slab gain modules similar to the first multi-slab gain module may be positioned to receive amplified output sub-beams from the first multi-slab gain module. The additional multi-slab gain modules generate further amplified output sub-beams of high aggregate power.

Abstract translation: 提供了一种高功率激光系统，其具有用于产生所需光束质量的参考激光束的主振荡器，用于将参考光束分成多个子光束的装置，多平板增益模块，定位成接收多个子光束作为输入 光束，以及用于相位调整子光束以使输出子光束相干地组合为单个复合输出光束的装置。 可选地，可以将类似于第一多板增益模块的附加多板增益模块定位成从第一多板增益模块接收放大的输出子光束。 附加的多板增益模块产生具有高聚集功率的进一步放大的输出子光束。

公开(公告)号：US20070201518A1

公开(公告)日：2007-08-30

申请号：US11361347

申请日：2006-02-24

Applicant: Joshua Rothenberg ,  Stephen Brosnan ,  Paul Epp

Inventor： Joshua Rothenberg ,  Stephen Brosnan ,  Paul Epp

IPC: H01S3/30 ,  H01S3/04

CPC classification number: H01S3/06754 ,  H01S3/0407 ,  H01S3/094003 ,  H01S3/0941 ,  H01S3/1608 ,  H01S3/1616 ,  H01S3/2383 ,  H01S5/02423

Abstract: A fiber laser system and a related method for its use, in which one or more fiber laser amplifiers are cryogenically cooled and optimized to operate at a desirably high efficiency. Versions of the laser system using either thulium or erbium doped fibers are disclosed. In a high power version of the system, the outputs of multiple fiber lasers are coherently combined. Cooling by a selected liquefied gas, such as nitrogen, is applied to the fiber laser amplifiers and, optionally, to pump diodes and to optical elements used to combine the outputs of the fiber laser amplifiers.

Abstract translation: 一种光纤激光系统及其使用方法，其中一个或多个光纤激光放大器经低温冷却和优化以期望的高效率运行。 公开了使用ium或掺铒光纤的激光系统的版本。 在系统的高功率版本中，多个光纤激光器的输出被相干地组合。 通过选择的液化气体（例如氮气）的冷却被施加到光纤激光放大器，并且可选地用于泵浦二极管和用于组合光纤激光放大器的输出的光学元件。

公开(公告)号：US20070086010A1

公开(公告)日：2007-04-19

申请号：US11256282

申请日：2005-10-19

Applicant: Joshua Rothenberg

Inventor： Joshua Rothenberg

IPC: G01B9/02

CPC classification number: H01S3/06754 ,  B23K26/0613 ,  B23K26/705 ,  H01S3/1301 ,  H01S3/1307 ,  H01S3/2383

Abstract: A method for combining beams from multiple laser emitters, which may be optical fibers or bulk amplifiers, to form a composite output beam with desirable beam characteristics, as measured, for example, by Strehl ratio. Beams from the multiple emitters are interferometrically combined in the near field, and the phases of the beams are controlled to provide optimal phase coherence, and thereby to minimize losses. Various techniques are disclosed for controlling the phase angles of the emitted beams, using either a separate phase detector for each emitter beam, or a single detector for the composite output beam, or nulling detectors in spurious outputs from the beam combining optics. All of these techniques achieve an improvement in Strehl, largely because the interferometric combination of beams is independent of the array fill factor.

Abstract translation: 用于组合来自多个激光发射器的光束的方法，其可以是光纤或体放大器，以形成具有期望的光束特性的复合输出光束，例如通过Strehl比测量。 来自多个发射器的光束在近场中被干涉地组合，并且控制光束的相位以提供最佳相位相干性，从而使损耗最小化。 公开了各种技术，用于使用用于每个发射器束的单独的相位检测器或用于复合输出光束的单个检测器或来自光束组合光学器件的伪输出中的归零检测器来控制发射的光束的相位角。 所有这些技术在Strehl实现了改进，主要是因为光束的干涉组合与阵列填充因子无关。

公开(公告)号：US20070019918A1

公开(公告)日：2007-01-25

申请号：US11186480

申请日：2005-07-20

Applicant: Joshua Rothenberg

Inventor： Joshua Rothenberg

IPC: G02B6/02

CPC classification number: G02B6/022

Abstract: A technique for suppressing stimulated Brillouin scattering (SBS) in fibers intended to handle high powers. A fiber is embedded in an elongated embedding material to form an embedded fiber structure. The embedded fiber structure is formed either as a cantilevered beam or as one or more turns around a circular or elliptical path, and then the entire structure is deformed to apply a desired strain that varies along the fiber length and results in suppression of SBS. In one embodiment, the embedded fiber structure is deformed by applying lateral and generally diametric force across the turns of the structure, resulting in changes to its curvature. In another embodiment the embedded fiber structure initially has a helical shape, which is deformed by stretching or twisting to change its radius. In either embodiment, a desired strain profile is obtained by selecting the position of the fiber with respect to a neutral axis.

Abstract translation: 用于抑制用于处理高功率的纤维中受激布里渊散射（SBS）的技术。 将纤维嵌入细长的嵌入材料中以形成嵌入的纤维结构。 嵌入式光纤结构形成为悬臂梁或围绕圆形或椭圆形路径的一个或多个匝，然后整个结构变形以施加沿着光纤长度变化的期望应变并导致SBS的抑制。 在一个实施例中，嵌入的纤维结构通过在结构的匝上施加横向和大体直径的力而变形，导致其曲率的变化。 在另一个实施例中，嵌入式光纤结构最初具有螺旋形状，其通过拉伸或扭转而变形以改变其半径。 在任一实施例中，通过选择纤维相对于中性轴的位置来获得期望的应变分布。

公开(公告)号：US20050249258A1

公开(公告)日：2005-11-10

申请号：US10841588

申请日：2004-05-07

Applicant: Joshua Rothenberg ,  William Long ,  Gregory Goodno ,  Paul Epp

Inventor： Joshua Rothenberg ,  William Long ,  Gregory Goodno ,  Paul Epp

IPC: H01S3/00 ,  H01S3/042 ,  H01S3/06 ,  H01S3/0941 ,  H01S3/13 ,  H01S3/16 ,  H01S3/23 ,  H01S3/091

CPC classification number: H01S3/0606 ,  H01S3/005 ,  H01S3/042 ,  H01S3/0612 ,  H01S3/0625 ,  H01S3/08095 ,  H01S3/0941 ,  H01S3/1301 ,  H01S3/1618 ,  H01S3/1643 ,  H01S3/2333

Abstract: A solid state zig-zag slab laser amplifier in which depolarization occurring at total internal reflection from opposed lateral faces of the amplifier slab is controlled by selecting a complex evanescent coating that provides a selected phase retardance that results in minimization of depolarization. Without use of the complex coating, small changes in incidence angles can result in phase retardance changes large enough to increase depolarization significantly, especially when the amplifier is operated at higher powers. Appropriate selection of the complex evanescent coating allows a desired phase retardance angle to be maintained relatively constant over a small range of angles of incidence, at a given wavelength, and therefore permits minimization of depolarization and birefringence effects.

Abstract translation: 通过选择提供选择的相位延迟以导致去极化最小化的复数渐逝涂层来控制在放大器板的相对侧面处的全内反射处发生去极化的固态锯齿形板激光放大器。 不使用复杂的涂层，入射角的小变化可导致相位延迟变化足够大以显着增加去极化，特别是当放大器在较高功率下工作时。 适当选择复杂的消逝涂层允许期望的相位延迟角度在给定波长的小入射角范围内保持相对恒定，因此允许最小化去极化和双折射效应。

公开(公告)号：US20070201795A1

公开(公告)日：2007-08-30

申请号：US11361352

申请日：2006-02-24

Applicant: Robert Rice ,  Michael Wickham ,  Joshua Rothenberg

Inventor： Robert Rice ,  Michael Wickham ,  Joshua Rothenberg

IPC: G02B6/26 ,  G02B6/42

CPC classification number: H01S3/06754 ,  H01S3/005 ,  H01S3/10007 ,  H01S3/1307 ,  H01S3/2383

Abstract: An optical beam combiner and a related method for its operation, in which multiple coherent input beams are directed onto a diffractive optical element (DOE) along directions corresponding to diffraction orders of the DOE, such that the DOE generates a single output beam in a direction corresponding to a desired diffraction order, and suppresses outputs in directions corresponding to unwanted diffraction orders. The phases of the input beams are actively controlled to ensure and maintain the condition that only a single diffraction mode is present in the output of the DOE.

Abstract translation: 一种用于其操作的光束组合器和相关方法，其中多个相干输入光束沿着与DOE的衍射级相对应的方向被引导到衍射光学元件（DOE）上，使得DOE沿着方向产生单个输出光束 对应于期望的衍射级，并且抑制与不想要的衍射级相对应的方向的输出。 输入光束的相位被主动地控制，以确保和保持在DOE的输出中仅存在单个衍射模式的条件。

公开(公告)号：US20060109878A1

公开(公告)日：2006-05-25

申请号：US10997415

申请日：2004-11-23

Applicant: Joshua Rothenberg

Inventor： Joshua Rothenberg

IPC: H01S3/04 ,  H01S3/091

CPC classification number: H01S3/0941 ,  H01S3/0606 ,  H01S3/063 ,  H01S3/08095 ,  H01S3/2308 ,  H01S3/2333 ,  H01S3/2341 ,  H01S3/2383 ,  H01S2301/02

Abstract: A solid state laser amplifier architecture in which multiple zig-zag slab laser amplifiers (50) are stacked together, side-pumped using a common pump source (52, 54), and cooled with a common cooling system. The stack of zig-zag slabs (50) produces an array of sub-beams (62) that can be combined coherently into a single composite output beam. Variations in pump power absorption through the stack are mitigated by selection of doping levels for the slabs (50). The composite output beam is sufficiently symmetrical to be directed through conventional optics of circular cross section. Multiple stacks may be arranged in a two-dimensional array to obtain even higher output powers.

Abstract translation: 一种固态激光放大器架构，其中多个锯齿形平板激光放大器（50）堆叠在一起，使用公共泵浦源（52,54）进行侧泵抽并用公共冷却系统冷却。 之字形板（50）堆叠产生可以相干地组合成单个复合输出光束的子光束（62）的阵列。 通过对板坯（50）的掺杂水平的选择来减轻通过堆叠的泵浦功率吸收的变化。 复合输出光束是足够对称的，可以通过圆形横截面的常规光学元件。 多个堆叠可以被布置成二维阵列以获得更高的输出功率。

公开(公告)号：US20050157761A1

公开(公告)日：2005-07-21

申请号：US10761747

申请日：2004-01-20

Applicant: Joshua Rothenberg ,  Eric Cheung ,  Hiroshi Komine ,  Robert Rice ,  Michael Wickham

Inventor： Joshua Rothenberg ,  Eric Cheung ,  Hiroshi Komine ,  Robert Rice ,  Michael Wickham

IPC: G02F1/37 ,  H01S3/067 ,  H01S3/08 ,  H01S3/10 ,  H01S3/23 ,  H01S3/30 ,  H01S5/14

CPC classification number: H01S5/14 ,  G02F1/37 ,  H01S3/06754 ,  H01S3/2383

Abstract: A laser array architecture scalable to very high powers by closely stacking fiber amplifiers, but in which the output wavelength is selectable to be in the visible or ultraviolet region, without being restricted by the wavelengths usually inherent in the choice of fiber materials. A pump signal at a fundamental frequency is amplified in the fiber amplifier array and input to an array of nonlinear crystals that function as harmonic generators, producing an output array at a desired harmonic of the fundamental frequency. A phase detection and correction system maintains the array of outputs in phase coherency, resulting in a high power output with high beam quality, at the desired frequency. The array of nonlinear crystals may a single array to produce a second harmonic output frequency, or a combination of multiple cascaded arrays configured to produce a selected higher order harmonic frequency.

Abstract translation: 通过紧密地堆叠光纤放大器，但其中输出波长可选择在可见光或紫外区域的激光阵列结构可以扩展到非常高的功率，而不受光纤材料选择中通常固有的波长的限制。 基频的泵浦信号在光纤放大器阵列中被放大并输入到作为谐波发生器的非线性晶体阵列，产生基频的期望谐波的输出阵列。 相位检测和校正系统维持相位一致性的输出阵列，从而产生具有所需频率的高光束质量的高功率输出。 非线性晶体阵列可以是单个阵列以产生二次谐波输出频率，或者被配置为产生选定的较高次谐波频率的多个级联阵列的组合。