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1. 发明授权

US06178040B1 Laser with two orthogonal zig-zag slab gain media for optical phase distortion compensation 失效
标题翻译：激光器具有两个正交的Z形板式增益介质，用于光学相位失真补偿
公开(公告)号：US06178040B1
公开(公告)日：2001-01-23
申请号：US09104477
申请日：1998-06-25
申请人： Hagop Injeyan , Randall J. St. Pierre , Stephen P. Palese
发明人： Hagop Injeyan , Randall J. St. Pierre , Stephen P. Palese
IPC分类号： H01S300
CPC分类号： H01S3/08095 , H01S3/0606 , H01S3/07 , H01S3/08072 , H01S3/2316
摘要： An optical amplifier for use with a solid state laser which includes a pair of elongated slabs of a solid state lasing material, such as a rare earth doped yttrium-aluminum-garnet (YAG) crystal. Two embodiments of the invention are disclosed. In both embodiments of the invention, each of the elongated slabs is formed with a square or generally rectangular cross-section. The slabs are configured such that the longitudinal axes of the slabs are generally co-axial aligned and the slabs are orientated such that the major axis of the slabs are generally orthogonal. By configuring the two slabs to be orthogonal with respect to one another, the integrated thermal lens becomes azimuthally symmetric and can be compensated by a simple external lens. In addition, the negative lensing affect along the major axis of one slab is used to compensate for the positive lensing affect along the minor axis of the other slab and vice versa, thus minimizing the affects of the astigmatism. In an alternate embodiment of the invention, a dove prism is used to rotate the beam instead of rotation of the slabs.
摘要翻译：一种用于固态激光器的光放大器，其包括一对固体激光材料的细长板，例如稀土掺杂的钇铝石榴石（YAG）晶体。公开了本发明的两个实施例。在本发明的两个实施例中，每个细长板形成有方形或大致矩形的横截面。板坯构造成使得板坯的纵向轴线大体上同轴对齐，并且板坯被定向成使得板坯的长轴线大致正交。通过将这两个平板相互配合，集成的热透镜变为方位角对称的，并且可以通过简单的外部透镜进行补偿。此外，沿着一个板坯的长轴的负透镜影响用于补偿沿着另一个板坯的短轴的正透镜影响，反之亦然，从而最小化散光的影响。在本发明的替代实施例中，使用鸽子棱镜来旋转梁而不是板的旋转。

2. 发明授权

US5646773A Solid-state zig-zag slab optical amplifier 失效
标题翻译：固态曲折平板光学放大器
公开(公告)号：US5646773A
公开(公告)日：1997-07-08
申请号：US541540
申请日：1995-10-10
申请人： Hagop Injeyan , Randall J. St. Pierre , Rodger C. Hilyard , George M. Harpole , Carolyn S. Hoefer
发明人： Hagop Injeyan , Randall J. St. Pierre , Rodger C. Hilyard , George M. Harpole , Carolyn S. Hoefer
IPC分类号： G02F1/35 , H01S3/04 , H01S3/042 , H01S3/06 , H01S3/08 , H01S3/0941 , H01S3/10 , H01S3/109 , H01S3/23 , H01S3/09
CPC分类号： H01S3/2316 , H01S3/042 , H01S3/0606 , H01S3/0941 , H01S3/0407 , H01S3/0621 , H01S3/0625 , H01S3/08072 , H01S3/08095 , H01S3/10076 , H01S3/109
摘要： A solid-state laser architecture producing a beam of extremely high quality and brightness, including a master oscillator operating in conjunction with a zig-zag amplifier, an image relaying telescope and a phase conjugation cell. One embodiment of the laser architecture compensates for birefringence that is thermally induced in the amplifier, but injects linearly polarized light into the phase conjugation cell. Another embodiment injects circularly polarized light into the phase conjugation cell and includes optical components that eliminate birefringence effects arising in a first pass through the amplifier. Optional features permit the use of a frequency doubler assembly to provide output at twice optical frequencies, and an electro-optical switch or Faraday rotator to effect polarization angle rotation if the amplifier material can only be operated at one polarization. The zig-zag amplifier is cooled by flow of cooling liquid, preferably using longitudinal flow to minimize temperature gradients in a vertical direction, and has cooling channel seals disposed in dead zones that receive no light, to minimize optical damage to the seals. Light is input to the amplifier at a near normal angle of incidence, to minimize polarization by reflection and to permit a polarizer to be used to extract an output beam from the amplifier. Antireflective coatings on edges and on sides of the amplifier eliminate parasitic oscillations, and wedge-shaped windows provide uniform pumping by eliminating gaps between diode arrays.
摘要翻译：一种固态激光器架构，产生了极高质量和亮度的光束，包括与之前的Zig放大器，图像中继望远镜和相位共轭单元结合操作的主振荡器。激光器结构的一个实施例补偿了在放大器中热感应的双折射，但是将线偏振光注入到相位共轭单元中。另一实施例将圆偏振光注入到相位共轭单元中，并且包括消除在第一次通过放大器中产生的双折射效应的光学部件。可选功能允许使用倍频器组件提供两倍光频率的输出，以及如果放大器材料只能在一个极化下操作，则电光开关或法拉第旋转器可实现偏振角旋转。锯齿形放大器通过冷却液体的流动来冷却，优选地使用纵向流动以使垂直方向上的温度梯度最小化，并且具有设置在不受光照射的死区中的冷却通道密封件，以最小化对密封件的光学损伤。光以接近的正常入射角输入到放大器，以通过反射使偏振最小化，并允许使用偏振器从放大器提取输出光束。在放大器的边缘和侧面上的抗反射涂层消除了寄生振荡，楔形窗口通过消除二极管阵列之间的间隙来提供均匀的泵浦。

3. 发明授权

US5467214A Birefringence-compensated alignment-insensitive frequency doubler 失效
标题翻译：双折射补偿对准不敏感倍频器
公开(公告)号：US5467214A
公开(公告)日：1995-11-14
申请号：US152647
申请日：1993-11-12
申请人： Lee O. Heflinger , William W. Simmons , Randall J. St. Pierre , Hagop Injeyan
发明人： Lee O. Heflinger , William W. Simmons , Randall J. St. Pierre , Hagop Injeyan
IPC分类号： G02F1/35 , G02F1/355 , G02F1/37 , H01S3/10 , H01S3/109 , G01J1/20
CPC分类号： G02F1/37 , H01S3/109 , H01S3/10076
摘要： Apparatus and a related method for generating a second harmonic frequency optical output from a fundamental frequency input beam, without significant birefringence. The apparatus includes two Type II doubler crystals of equal length arranged with their corresponding axes parallel to each other, and a polarization rotator positioned between the doubler crystals, to rotate the polarization angle of a residual fundamental frequency component of an output beam from one of the crystals by 90.degree. or an odd multiple of 90.degree.. Random birefringence introduced into one of the doubler crystals is virtually canceled in the other, and the assembly of the two crystals and the polarization rotator may be angularly adjusted as needed for phase matching or tuning, without detracting from the birefringence compensation capability. The invention is also disclosed in the context of a phase conjugated master oscillator power amplifier (PC MOPA) system.
摘要翻译：用于从基频输入光束产生二次谐波频率光输出的装置和相关方法，没有显着的双折射。该装置包括两个相等长度的II型倍频晶体，它们的对应的轴线彼此平行，并且偏振旋转器位于倍晶晶体之间，以使输出光束的剩余基频分量的偏振角从晶体90°或90°的奇数倍。引入到倍晶晶体之一中的随机双折射在另一个实际上被消除，并且两个晶体和偏振旋转器的组装可以根据需要进行角度调整，以进行相位匹配或调谐，而不会降低双折射补偿能力。在相位共轭主振荡器功率放大器（PC MOPA）系统的上下文中也公开了本发明。

4. 发明授权

US6034977A Optical path difference control system and method for solid state lasers 失效
标题翻译：固态激光器光路差分控制系统及方法
公开(公告)号：US6034977A
公开(公告)日：2000-03-07
申请号：US24137
申请日：1998-02-17
申请人： Randall J. St. Pierre
发明人： Randall J. St. Pierre
IPC分类号： H01S3/04 , H01S3/042 , H01S3/06 , H01S3/08 , H01S3/131
CPC分类号： H01S3/131 , H01S3/042 , H01S3/0405 , H01S3/0606 , H01S3/08072 , H01S3/1317
摘要： A method of controlling the thermal optical path difference (OPD) in a lasing medium in a solid state laser during pumping of a lasing medium 10 including a pair of side faces 12 for receiving radiation during pumping and a pair of edge faces 16, comprises the steps of determining a temperature difference, .DELTA.T.sub.min, between the side faces and the edge faces that corresponds with approximately a minimum, OPD.sub.min, in the OPD, and maintaining about .DELTA.T.sub.min during pumping of the lasing medium, such that the OPD is maintained at approximately OPD.sub.min. The temperature difference is maintained by controlling heat transfer at the edge faces of the lasing medium. The temperature difference between the edge faces and the side faces can be actively controlled such that the method can be automated.
摘要翻译：在激光激发介质10的激励期间控制固态激光器的激光介质中的热光程差（OPD）的方法，该激光介质10包括用于在泵送期间接收辐射的一对侧面12和一对边缘面16，在OPD中确定对应于大约最小值OPDmin的侧面和边缘面之间的温差（DELTA Tmin）的步骤，并且在激光介质的泵送期间保持约DELTA Tmin，使得OPD保持在大约OPDmin。通过控制激光介质的边缘面处的热传递来维持温差。边缘面和侧面之间的温差可以被主动地控制，使得该方法可以自动化。

5. 发明授权

US5949805A Passive conductively cooled laser crystal medium 失效
标题翻译：被动导电冷却激光晶体介质
公开(公告)号：US5949805A
公开(公告)日：1999-09-07
申请号：US935265
申请日：1997-09-22
申请人： David W. Mordaunt , Randall J. St. Pierre , George M. Harpole , James M. Zamel
发明人： David W. Mordaunt , Randall J. St. Pierre , George M. Harpole , James M. Zamel
IPC分类号： H01S3/04 , H01S3/042 , H01S3/06 , H01S3/0941
CPC分类号： H01S3/042 , H01S3/0405 , H01S3/0606 , H01S3/08095 , H01S3/0941
摘要： There is provided an optically pumped laser apparatus 10 which includes a heat conductive assembly 14 which is affixed to a solidstate yag laser crystal medium for generating a laser beam 49 within the laser crystal medium 12. The heat conductive assembly 14 comprises a heat diffusing element 32 which serves to diffuse the heat that is generated through the cooling surfaces 24 and 26. It includes a heat discharging structure 33 for removing the heat from the system. The efficiency of the laser system is improved by the geometry of pumping the crystal laser medium along the paths shown by the arrow 40 and to directing heat removed by the heat conductive assembly along the arrows 42, which paths are normal to one another and which provide an effective geometry that minimizes temperature variations within the laser crystal 12 to provide a low value for the OPD of the system. The heat conductive assembly 14 may include a liquid type heat exchanger 43, or heat pipes 33 to facilitate removal of the heat from the diffuser 32.
摘要翻译：提供了一种光泵浦激光装置10，其包括导热组件14，该导热组件14固定到固态YAG激光晶体介质上，用于在激光晶体介质12内产生激光束49.导热组件14包括热扩散元件32 其用于扩散通过冷却表面24和26产生的热量。其包括用于从系统去除热量的排热结构33。通过沿着箭头40所示的路径泵送晶体激光介质的几何形状来改善激光系统的效率，并且引导通过导热组件沿着箭头42移除的热量，这些路径彼此垂直并且提供这是有效的几何形状，其使得激光晶体12内的温度变化最小化，以为系统的OPD提供低的值。导热组件14可以包括液体型热交换器43或热管33，以便于从扩散器32去除热量。

6. 发明授权

US5825791A Variable coherence length high brightness laser architecture 失效
标题翻译：可变相干长度高亮度激光器架构
公开(公告)号：US5825791A
公开(公告)日：1998-10-20
申请号：US520349
申请日：1995-08-28
申请人： Hagop Injeyan , Lawrence J. Lembo , Randall J. St. Pierre , Marcy M. Valley
发明人： Hagop Injeyan , Lawrence J. Lembo , Randall J. St. Pierre , Marcy M. Valley
IPC分类号： H01S3/05 , G02F1/03 , H01S3/00 , H01S3/10 , H01S3/16 , H01S3/23
CPC分类号： H01S3/0057 , H01S3/10076 , H01S3/2333
摘要： A high power laser source having a preselected broad bandwidth, including a master oscillator providing a single-mode laser beam, a resonant electro-optical modulator and a source of radio-frequency (rf) modulation voltage, to produce a modulator output beam having sidebands spaced on each side of the nominal frequency of the single-mode laser beam. The bandwidth and the number of modes may be varied by controlling the voltage applied to the modulator. At least one additional modulator in series with the first provides for the addition of other sidebands overlaying those generated with just one modulator. In another embodiment of the invention, the modulator is installed in a PC MOPA (phase conjugated master oscillator power amplifier) configuration to provide modulation only on the return path of the beam from a phase conjugation device having a stimulated Brillouin scattering (SBS) medium. Because the electro-optical modulator is sensitive to polarization direction, it can be oriented to be effective only for the return beam, which has a different direction of polarization from that of the single-mode laser beam, thus optimizing the performance of the SBS medium.
摘要翻译：具有预选宽带宽的高功率激光源，包括提供单模激光束的主振荡器，谐振电光调制器和射频（RF）调制电压源），以产生具有边带的调制器输出光束在单模激光束的标称频率的每一侧隔开。可以通过控制施加到调制器的电压来改变带宽和模式数量。与第一个串联的至少一个附加调制器提供了与仅用一个调制器产生的边带重叠的其他边带的添加。在本发明的另一个实施例中，调制器安装在PC MOPA（相位共轭主振荡器功率放大器）配置中，以仅提供来自具有受激布里渊散射（SBS）介质的相位共轭装置的波束的返回路径的调制。因为电光调制器对极化方向敏感，所以它可以被定向为仅对于具有与单模激光束的偏振方向不同的返回光束有效，从而优化SBS介质的性能。

7. 发明授权

US5818856A Ozone compatible stimulated brillouin scattering materials 失效
标题翻译：臭氧兼容刺激的布里渊散射物质
公开(公告)号：US5818856A
公开(公告)日：1998-10-06
申请号：US697649
申请日：1996-08-28
申请人： Hagop Injeyan , Randall J. St. Pierre
发明人： Hagop Injeyan , Randall J. St. Pierre
IPC分类号： G02F1/35 , G02F1/361 , H01S3/10 , H01S3/30
CPC分类号： H01S3/307 , H01S3/10076
摘要： A device for producing phase conjugation of electromagnetic radiation using stimulated Brillouin scattering (SBS), comprising an SBS cell having a liquid perfluorocarbon as an SBS medium. The liquid perfluorocarbon is selected from the group of compounds having the formula C.sub.x F.sub.y, wherein x>1 and y>4. Preferably, x>4 and y 1 and y>4. Preferably, x>4 and y
摘要翻译：一种使用受激布里渊散射（SBS）产生电磁辐射相位共轭的装置，包括具有液体全氟化碳作为SBS介质的SBS电池。液体全氟化碳选自具有式C x F y的化合物，其中x> 1且y> 4。优选x> 4且y <16，最优选4 1且y> 4。优选x> 4且y <16，最优选4

8. 发明授权

US06069730A Phase conjugated master oscillator-power amplifier breakdown control 有权
标题翻译：相位共振主振荡器 - 功率放大器击穿控制
公开(公告)号：US06069730A
公开(公告)日：2000-05-30
申请号：US134466
申请日：1998-08-14
申请人： Hagop Injeyan , Randall J. St. Pierre , Mark E. Weber
发明人： Hagop Injeyan , Randall J. St. Pierre , Mark E. Weber
IPC分类号： H01S3/30 , H01S3/00 , H01S3/10 , H01S3/13 , H01S3/131 , H01S3/23
CPC分类号： H01S3/10076 , H01S3/1303 , H01S3/131 , H01S3/2333
摘要： A system and method for monitoring the mode of an input beam to a phase conjugated master oscillator power amplifier (PC MOPA). In order to prevent catastrophic optical damage to the MOPA components, the method and system shuts down the master oscillator when a multi-mode input beam is detected.
摘要翻译：一种用于监视输入光束到相位共振主振荡器功率放大器（PC MOPA）的模式的系统和方法。为了防止对MOPA组件的灾难性光学损坏，当检测到多模式输入光束时，该方法和系统关闭主振荡器。

9. 发明授权

US5640406A Birefringence compensated laser architecture 失效
标题翻译：双折射补偿激光器架构
公开(公告)号：US5640406A
公开(公告)日：1997-06-17
申请号：US415880
申请日：1995-04-03
申请人： Hagop Injeyan , Randall J. St. Pierre
发明人： Hagop Injeyan , Randall J. St. Pierre
IPC分类号： G02F1/35 , H01S3/04 , H01S3/042 , H01S3/06 , H01S3/08 , H01S3/0941 , H01S3/10 , H01S3/109 , H01S3/23 , H01S3/00
CPC分类号： H01S3/2316 , H01S3/042 , H01S3/0606 , H01S3/0941 , H01S3/0407 , H01S3/0621 , H01S3/0625 , H01S3/08072 , H01S3/08095 , H01S3/10076 , H01S3/109
摘要： Apparatus, and a related method, for compensating for birefringence introduced in a birefringent medium, such as a solid-state amplifier. The invention includes the combination of a quarter-wave plate, a Faraday rotator and a mirror, which may be a phase conjugation cell. Light passing through the quarter-wave plate is substantially circularly polarized, which is advantageous if the mirror is a phase conjugation cell using stimulated Brillouin scattering (SBS). A second pass through the quarter-wave plate provides a linearly polarized beam of which the polarization angle is orthogonally related to that of the original beam, to facilitate out-coupling of energy from the apparatus. The Faraday rotator effects a total polarization angle rotation of 90.degree. in two passes and helps compensate for birefringence when the beam is passed through the birefringent medium again on the return pass. The combination of the quarter-wave plate and the Faraday rotator provides better birefringence cancellation than either element acting alone.
摘要翻译：用于补偿在双折射介质（例如固态放大器）中引入的双折射的装置和相关方法。本发明包括四分之一波片，法拉第旋转器和反射镜的组合，其可以是相位共轭单元。通过四分之一波片的光基本上是圆偏振的，如果反射镜是使用受激布里渊散射（SBS）的相位共轭单元，这是有利的。通过四分之一波片的第二次通过提供线性偏振光束，其偏振角与原始光束正交相关，以促进来自该装置的能量的外耦合。法拉第旋转器在两次通过中实现90°的总偏振角旋转，并且当光束在返回通道上再次通过双折射介质时有助于补偿双折射。四分之一波片和法拉第旋转器的组合提供比单独作用的任一元件更好的双折射消除。

10. 发明授权

US5555254A High brightness solid-state laser with zig-zag amplifier 失效
标题翻译：具有锯齿形放大器的高亮度固态激光器
公开(公告)号：US5555254A
公开(公告)日：1996-09-10
申请号：US148758
申请日：1993-11-05
申请人： Hagop Injeyan , Randall J. St. Pierre , Rodger C. Hilyard , George M. Harpole , Carolyn S. Hoefer
发明人： Hagop Injeyan , Randall J. St. Pierre , Rodger C. Hilyard , George M. Harpole , Carolyn S. Hoefer
IPC分类号： G02F1/35 , H01S3/04 , H01S3/042 , H01S3/06 , H01S3/08 , H01S3/0941 , H01S3/10 , H01S3/109 , H01S3/23
CPC分类号： H01S3/2316 , H01S3/042 , H01S3/0606 , H01S3/0941 , H01S3/0407 , H01S3/0621 , H01S3/0625 , H01S3/08072 , H01S3/08095 , H01S3/10076 , H01S3/109
摘要： A solid-state laser architecture producing a beam of extremely high quality and brightness, including a master oscillator operating in conjunction with a zig-zag amplifier, an image relaying telescope and a phase conjugation cell. One embodiment of the laser architecture compensates for birefringence that is thermally induced in the amplifier, but injects linearly polarized light into the phase conjugation cell. Another embodiment injects circularly polarized light into the phase conjugation cell and includes optical components that eliminate birefringence effects arising in a first pass through the amplifier. Optional features permit the use of a frequency doubler assembly to provide output at twice optical frequencies, and an electro-optical switch or Faraday rotator to effect polarization angle rotation if the amplifier material can only be operated at one polarization. The zig-zag amplifier is cooled by flow of cooling liquid, preferably using longitudinal flow to minimize temperature gradients in a vertical direction, and has cooling channel seals disposed in dead zones that receive no light, to minimize optical damage to the seals. Light is input to the amplifier at a near normal angle of incidence, to minimize polarization by reflection and to permit a polarizer to be used to extract an output beam from the amplifier. Antireflective coatings on edges and on sides of the amplifier eliminate parasitic oscillations, and wedge-shaped windows provide uniform pumping by eliminating gaps between diode arrays.
摘要翻译：一种固态激光器架构，产生了极高质量和亮度的光束，包括与之前的Zig放大器，图像中继望远镜和相位共轭单元结合操作的主振荡器。激光器结构的一个实施例补偿了在放大器中热感应的双折射，但是将线偏振光注入到相位共轭单元中。另一实施例将圆偏振光注入到相位共轭单元中，并且包括消除在第一次通过放大器中产生的双折射效应的光学部件。可选功能允许使用倍频器组件提供两倍光频率的输出，以及如果放大器材料只能在一个极化下操作，则电光开关或法拉第旋转器可实现偏振角旋转。锯齿形放大器通过冷却液体的流动来冷却，优选地使用纵向流动以使垂直方向上的温度梯度最小化，并且具有设置在不受光的死区中的冷却通道密封件，以最小化对密封件的光学损伤。光以接近的正常入射角输入到放大器，以通过反射使偏振最小化，并允许使用偏振器从放大器提取输出光束。在放大器的边缘和侧面上的抗反射涂层消除了寄生振荡，楔形窗口通过消除二极管阵列之间的间隙来提供均匀的泵浦。

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